[1.01-1]
Anzahl=12
1=MC;Is the welding procedure m gas-shielded metal arc-welding possible and what is the meaning of the letter m ?;m gas-shielded metal arc-welding is possible, since when using the gas-shielded metal arc-welding process the welding filler is added manually.;FALSE;m gas-shielded metal arc-welding is not possible, since when using the gas-shielded metal arc-welding process, welding filler is, due to the process principle, added from a roll.;TRUE;The letter m stands for mechanical welding.;FALSE;The letter m stands for manual welding.;TRUE;The letter m stands for mechanical manipulation of the torch.;FALSE;8
2=MC;How are the movement- and working-processes of fully mechanised TIG welding and gas-shielded metal arc-welding defined?;Mechanical manipulation of the torch.;TRUE;Manual manipulation of the torch.;FALSE;Manual filler metal feed.;FALSE;Mechanical filler metal feed.;TRUE;Manual handling of workpiece.;TRUE;8
3=MC;Which of the following statements concerning DIN 1910 part 2 are correct?;The terms of welding engineering are defined in DIN 1910 part 2.;FALSE;The processes for welding metals are defined in DIN 1910 part 2.;TRUE;Only the processes concerning pressure welding of metals are defined in DIN 1910 part 2.;FALSE;Only the processes concerning fusion welding of metals are defined in DIN 1910 part 2.;FALSE;In DIN 1910 part 2 the processes for welding of metals are subdivided into pressure and fusion welding processes.;TRUE;5
4=MC;In which standard is the term ”welding” defined?;DIN 1911 part1;FALSE;DIN 1910 part 2;FALSE;DIN 1910 part 1;TRUE;DIN EN 12345;FALSE;DIN 1901 part 1;FALSE;2
5=MC;DIN 1910 part 1 bears a classification of the purpose of welding. Which statements in relation to this are correct ?;The standard distinguishes between the joining by welding and the building-up welding.;TRUE;The standard distinguishes between the pressure and fusion welding process.;FALSE;Base and building-up materials are always different in case of building-up welding.;FALSE;Base and building-up materials can be different when building-up welding.;TRUE;In DIN 1910 part 1 there is no classification of the purpose of welding.;FALSE;6
6=MC;Which of the following terms belong to the production related terms of welding ?;Terms concerning the welding execution of welding.;TRUE;Terms concerning technical-physical values.;TRUE;Terms concerning auxiliaries.;TRUE;The term ”welding filler metal” is a production related term.;FALSE;The nomenclature of the welding groove, joint and seam are also production related terms.;FALSE;9
7=MC;Which of the symbols are used when fully mechanised TIG and gas-shielded metal arc-welding ?;m;FALSE;t;FALSE;mv;FALE;v;TRUE;vm;FALSE;8
8=MC;Which of the following statements concerning soldering are correct ?;The solidus temperature of the base material is exceeded when soldering.;FALSE;The solidus temperature of the base material is not exceeded when soldering.;TRUE;Soldering is also used for surfacing a material.;TRUE;Soldering cannot be used for surfacing a material.;FALSE;Soldering is a thermal process for joining and surfacing components.;FALSE;3
9=MC;DIN 1910 part 1 bears among others a classification of the ‘physical’ process of welding. Concerning this which statements are correct ?;The standard distinguishes between the joining by welding and the building-up welding.;FALSE;The standard distinguishes between pressure and fusion welding.;TRUE;Fillers are never used when pressure welding.;FALSE;Fillers are always used when fusion welding.;FALSE;Fusion welding processes are welding processes without the use of pressure.;TRUE;7
10=MC;Which of the following statements concerning welding are correct?;A filler is always used when welding.;FALSE;A filler is never used when pressure welding.;FALSE;When pressure welding a filler is always used.;FALSE;Welding is the joining of materials with application of heat and/or pressure, with or without the addition or welding filler.;TRUE;By welding consumables welding can be facilitated or rendered possible.;TRUE;2
11=MC;Which of the following statements concerning welding indexes are correct?;All arc-welding processes start with the index 3.;FALSE;All arc-welding processes start with the index 1.;TRUE;All gas-shielded metal arc-welding processes start with the index 13.;TRUE;All gas-shielded metal arc-welding processes start with the index 32.;FALSE;All submerged arc welding processes start with the index 12.;TRUE;10
12=MC;By which letters are the resistance welding processes according to DIN 1910 defined ?;R;TRUE;W;FALSE;WS;FALSE;RA;TRUE;RP;TRUE;10

[1.01-2]
Anzahl=4
1=MC;Which of the following welding processes are part of fusion welding processes?;Gas welding;TRUE;Friction welding;FALSE;Arc welding;TRUE;Resistance fusion welding;TRUE;Flash butt welding;FALSE;1
2=MC;Typical examples of pressure welding processes are:;Spot welding;TRUE;Projection welding;TRUE;Electro slag welding;FALSE;Hammer welding;TRUE;Autogenous welding;FALSE;3
3=MC;According to which criteria are the welding processes chosen?;Geometry of the production hall.;FALSE;Geometry of the component.;TRUE;Qualification of the inspector.;FALSE;Economic efficiency of the processes.;TRUE;Accessibility of the weld seam.;TRUE;6
4=MC;The arc is as an energy carrier used for the following processes:;TIG welding;TRUE;Seam welding;FALSE;Spot welding;FALSE;Gas welding;FALSE;Metal arc welding;TRUE;1

[1.02-1]
Anzahl=5
1=MC;Which of the following processes are part of the autogenous technique?;thermal separation of  concrete.;TRUE;flame hardening.;TRUE;plasma arc spraying.;FALSE;soldering and brazing.;TRUE;shielding gas welding.;FALSE;1
2=MC;Which of the following statements concerning the fuel gas acetylene are correct?;Acetylene is the most used fuel gas in the autogenous technique.;TRUE;The molecule acetylene easily falls apart into carbon and oxygen.;FALSE;Acetylene is stored in specially equipped steel cylinders. These cylinders contain a porous filling mass in order to avoid a possible falling apart of the acetylene.;TRUE;Acetylene is delivered in gas cylinders which generally are only allowed to be opened in a horizontal position if they are marked with a blue ring at the cylinder neck.;FALSE;With the acetylene regulator it is to consider that the back pressure should not exceed 1.5 bar.;TRUE;2
3=MC;Oxygen is saved compressed and in gaseous state in steel cylinders. Calculate in m3 the gas content according to the optimal gas law for the following values. A) volume 50 l, filling pressure 200 bar. B) volume 10 l, filling pressure 150 bar.;A has a gas content of 20 m3.;FALSE;A has a gas content of 10 m3.;TRUE;B has a gas content of 30 m3.;FALSE;B has a gas content of 24 m3.;FALSE;B has a gas content of 1.5 m3.;TRUE;5
4=MC;Which of the following statements concerning the acetylene supply system are correct?;The pressure regulator’s task is to set the working pressure, independent of the cylinder filling pressure and the amount of gas taken out and if possible to keep it constant.;TRUE;The back flow nozzle’s task is to protect from possible gas back flows.;TRUE;The flame blockade protects from a flame back flow. It is mostly combined in a supply line which raises the level of security.;FALSE;The flash back blockade closes the nozzle by melting the melting solder when heating up.;FALSE;An increase in the gas pressure triggers an immediate closure of the flash back source.;TRUE;3
5=MC;Which of the following statements concerning flame cleaning are correct?;It can be worked on surfaces of steel and concrete.;TRUE;It is a mechanical process to work on surfaces.;FALSE;It is a thermal process to work on surfaces.;TRUE;Mostly the torches have a width of up to 1 m.;TRUE;When flame cleaning a material upsetting is forced by local heating up and hindered heat expansion.;FALSE;1

[1.02-2]
Anzahl=7
1=MC;Which of the following statements concerning the oxyacetylene flame are correct?;With an acetylene surplus the flame shows a light blue inner flame cone.;FALSE;With an acetylene surplus the flame shows a yellowish-white inner flame cone.;TRUE;The relation of mixture of fuel gas and oxygen is at 1 to 4 in case of a neutral flame.;FALSE;The core of the oxygen-surplus flame has a slightly violet colour.;TRUE;Brass is welded with a great oxygen surplus.;TRUE;4
2=MC;Which statements correspond to the fuel gas C2H2?;It is heavier than air.;FALSE;This fuel gas has the lowest combustion temperature of all fuel gases.;FALSE;This fuel gas has the highest combustion temperature of all fuel gases.;TRUE;The flame temperature is at approx. 3500 °C.;TRUE;The combustion is effected via a high concentration area.;TRUE;2
3=MC;The operation area in an autogenous flame is used because:;The temperature is very low.;FALSE;It contains the highest temperatures.;TRUE;The temperature amounts approx. 2500 – 3000 °C.;TRUE;The reduced effect of the operating zone is used.;TRUE;The temperature amounts approx. 1500 – 2000 °C.;FALSE;2
4=MC;How can you recognise a flame that has acetylene surplus?;The flame is clear and has sharp outlines.;FALSE;The flame cone is yellowish-white.;TRUE;The flame cone is sharply separated from the external streamer.;FALSE;The flame core is slightly purple.;FALSE;The mixture relations of fuel gas and oxygen go from 1:1 to 1:1.2.;FALSE;4
5=MC;The handle of an autogenous welding torch mainly consists of:;A torch.;TRUE;Oxygen and fuel gas connection.;TRUE;Oxygen and fuel gas valve.;TRUE;Welding nozzle.;FALSE;Mixing nozzle.;FALSE;7
6=MC;When autogenous welding the rightward welding technique is preferentially used because:;It is good for welding thin plates.;FALSE;All materials can be welded.;FALSE;It can be worked without filler.;FALSE;Plates with a thickness of 3 to 7 mm can be welded safely.;TRUE;A visual control of the through-welding is possible via the keyhole.;TRUE;8
7=MC;Depending on the plate thickness, when autogenous joint welding it is distinguished between:;Leftward welding.;TRUE;Rightward welding.;TRUE;Carving (leading);FALSE;Gravity welding.;FALSE;Vertical-down welding.;FALSE;8

[1.04]
Anzahl=9
1=DD;Move with the left mouse button pressed one of the three pictures listed below in order to create a resistance circuits with a total resistance of 30 Ohm.;wider.png;wider1.png;wider2.png;wider3.png;631;299;2
2=DD;Move with the left mouse button pressed one of the three pictures listed below in order to create a resistance circuits with a total resistance of 2,5 Ohm.;wider_1.png;wider_1_1.png;wider_1_2.png;wider_1_3.png;650;369;4
3=PU;Move with the left mouse button pressed the pictures listed below in order to create a resistance circuit with a total resistance of 3 Ohm.;wider_2_1.png;wider_2_2.png;wider_2_3.png;wider_2_4.png;wider_2_5.png;wider_2_6.png;wider_2_7.png;wider_2_8.png;4
4=MC;Which of the following statements concerning transformer and induced voltage are correct?;Every current-carrying conductor is surrounded by a magnetic field.;TRUE;Only a DC conductor is surrounded by a magnetic field.;FALSE;Only an AC conductor is surrounded by a magnetic field.;FALSE;The magnetic field lines go by about the same amount through the bundle of laminations and the air.;FALSE;The illustrated current flow of the primary side creates the shown power on the secondary side.;FALSE;11;Stromverlauf.png
5=DD;Move with the left mouse button pressed one of the three pictures listed below in order to create a bridge rectifier circuit.;diode3.png;diode_a.png;diode_b.png;diode_c.png;680;307;26
6=PU;Move with the left mouse button pressed the pictures listed below in order to create a circuit of a three-phase bridge rectifier.;db1.png;db2.png;db3.png;db4.png;db5.png;db6.png;db7.png;db8.png;26
7=MC;Calculate the inactive power and the power factor in an AC with the following information: P = 100 W, Q = 40 var.;apparent power = 140.0 VA;FALSE;apparent power = 107.7 VA;TRUE;apparent power = 91.6 VA;FALSE;power factor = 0.93;TRUE;power factor = 0.71;FALSE;21;bild28.png
8=MC;Which of the following statements concerning the dynamic effect on current-carrying conductors in the magnetic field are correct?;If electric current flows through a conductor which is placed in a magnetic field a deflecting force is created which tries to deflect the conductor.;TRUE;The height of the deflecting force depends on the amperage.;FALSE;In the case of a motor principle the following line of influence is valid: current > creates > magnetic field > creates > power.;TRUE;The formula for the deflecting conductor is: F = B · L · v.;FALSE;The formula for the deflecting conductor is: F = B · L · I .;TRUE;12
9=MC;With a stretched resistance wire of L = 10 m a 50 Hz AC of 10 V creates a current flow of 10 A. The electric power of P = 100 W is completely converted into heat. If the wire is now formed to a coil it has the effect that:;When keeping the height of voltage the current adaptation decreases.;TRUE;The heat effect can be calculated by multiplying the current curve with the adapted current.;FALSE;The voltage and current flow do not cross the zero crossing simultaneously.;TRUE;In the voltage curve the time will be set to maximum while the current curve has its zero crossing.;FALSE;The flow of the current is leading.;FALSE;21

[1.04-a]
Anzahl=10
1=PU;Move with the left mouse button pressed one of the pictures listed below in order to create a resistance circuit with a total resistance of 3.8 Ohm.;wider_2_1.png;wider_2_2.png;wider_2_3.png;wider_2_4.png;wider_2_5.png;wider_2_6.png;wider_2_7.png;wider_2_8.png;4
2=MC;Which of the following statements concerning three-phase current are correct?;There are three different currents available.;FALSE;There are two different currents available.;TRUE;Instead of 3 and 4 there are 6 conductors used for the interlinking for the transfer of three-phase current.;TRUE;The three-phase voltages have  same frequencies.;TRUE;The three-phase voltages have three different frequencies.;FALSE;24
3=MC;Which of the following statements concerning thyristors are correct?;Thyristors are comparable to back pressure valves which control simultaneously the flow-trough time.;TRUE;By using the thyristors the area of the current time curve on the AC can be changed.;TRUE;By a quick application of a control voltage (ignition impulse) the thyristor can be converted from a high ohm into a low ohm state.;TRUE;Thyristors and transformers are due to their two main control connections exchangeable.;FALSE;Thyristors can be ignited during the positive and the negative half-wave.;FALSE;27
4=MC;Which of the following statements concerning transistors are correct?;Since diodes are comparable to back pressure valves, transistors can be compared to control valves.;TRUE;In the case of a transistor the main current is controlled by application of a control voltage.;TRUE;By a quick application of a control voltage (ignition impulse) the transistor can be converted from a high ohm into a low ohm state.;FALSE;Transistors have two main and control connections.;FALSE;Due to their principle transistors are controllable inductive resistances.;FALSE;28
5=MC;Which of the following statements concerning diodes and rectifier are correct?;Diodes have three connections.;FALSE;Their task is to change their resistance and therefore restrict the amperage in accordance with the height of the applied voltages.;FALSE;The resistance of a diode depends on the polarity of the applied voltage.;TRUE;In a rectifying circuit there are several diodes placed in a row in order to smoothen the created DC.;FALSE;By changing polarity of the diodes in a rectifying circuit DC can change to AC.;FALSE;25
6=MC;Which of the following statements concerning serial connection of different resistances are correct?;At all resistances there is the same voltage difference.;FALSE;The current is equal in all three resistances.;TRUE;The current is not equal in all three resistances.;FALSE;The total resistance is equal to the amount of single resistances.;TRUE;The total resistance is smaller than the smallest single resistance.;FALSE;2
7=MC;Which of the following statements concerning parallel circuits of three different resistances are correct?;Since the same voltage is used at every resistance the same current flows through every resistance.;FALSE;The total resistance is smaller than the smallest single resistance.;TRUE;If several consumers are connected to a multiple socket the consumers are parallel connected.;TRUE;The complete power absorption of several parallel connected consumers can be calculated by multiplying the total current with the voltage.;TRUE;The unit of electric work is KWh.;FALSE;4
8=MC;Which of the following statements concerning electric work are correct?;The counting device provided by energy supplying companies calculates the electric power.;FALSE;With the indication of Wel 40 KWh and the corresponding time indication t = 30 min the electric power can be calculated.;TRUE;The heat produced by the current can be calculated as follows:  Q = I² • R • t.;TRUE;The heat produced by the current can be calculated as follows:  Q = U² • R • t.;FALSE;The numeried values of the units Ws, Joule and Nm can only be compared with each other with conversion factors. ;FALSE;6
9=MC;Which of the following statements concerning capacitance and capacitor are correct?;The capacitor belongs to the semiconductor part of the electric engineering.;FALSE;The capacitor is mainly used for current heat creation.;FALSE;By applying AC the capacitor can save electric power in form of an electric field.;TRUE;If the capacitor is charged up to the charging voltage there can be no supplementary charging current flow by increasing the voltage.;FALSE;The illustrated signal course was drawn by an application of a capacitor.;TRUE;7;Spannung-Strom.png;
10=MC;Which of the following statements concerning inductivity and coil are correct?;Inductivity is the ability of intermediate storing of electric energy in form of a magnetic field.;TRUE;An electric conductor which is formed to a coil only creates inductivity if an iron core is placed in the middle of the coil.;FALSE;The inductivity of a coil is, among others, depending on the coil length.;TRUE;The inductivity of a coil is, among others, depending on the cross section of the coil conductor.;FALSE;The inductivity of a coil is, among others, depending on the amount of windings.;TRUE;8;spule.png;

[1.05-1]
Anzahl=12
1=MC;Which of the following statements concerning welding arcs are correct?;The arc cannot be ignited without any contact.;FALSE;The arc can only be ignited contactless with ignition devices.;FALSE;Arc welding can only be performed with direct current.;FALSE;Arc welding can be performed with alternating current.;FALSE;Arc welding can be performed with direct and alternating current.;TRUE;4
2=MC;Which mechanisms create charged particles in the arc?;Shock emission.;TRUE;Magnet emission.;FALSE;Stray emission.;FALSE;Field emission.;TRUE;Thermal emission.;TRUE;2
3=MC;In the operating area the arc nearly acts according to the Ohm’s law. Which statements are correct?;With decrease of the current the voltage increases.;FALSE;By increasing the arc length the voltage remains the same.;FALSE;By decreasing the arc length the arc voltage is reduced.;TRUE;At a certain arc length current and voltage values are part of an operating spot.;TRUE;All operating spots are situated on one line at a certain constant arc length.;TRUE;5
4=MC;The arc creates:;the necessary energy for the welding process.;TRUE;ultraviolet radiation.;TRUE;harmful x-radiation.;FALSE;rays in the ultrared area.;TRUE;rays in the ultragreen area.;FALSE;5
5=MC;Protective welding equipment consists of:;flame resistant clothes.;TRUE;water resistant clothes.;FALSE;gloves.;TRUE;apron to protect from x-rays of the arc.;FALSE;protective shoes.;TRUE;5
6=MC;Which standard defines the necessary protective glasses for welding?;EN 439.;FALSE;EN 26053.;FALSE;DIN EN 166/169.;TRUE;EN 440.;FALSE;EN 756.;FALSE;5
7=MC;Which of the following definitions are part of the arc?;Anode and cathode fall area.;TRUE;Arc column.;TRUE;Short arc.;FALSE;Pulsed arc.;FALSE;Arc plasma.;TRUE;6
8=MC;Which effect has the radial orientated Lorenz-force (also called pinch effect) in the arc?;A drop detachment of the wire electrodes when metal shielding gas welding.;TRUE;The heating up of the tungsten electrode when TIG-welding.;FALSE;Constriction of the free wire end.;TRUE;Ripping apart the oxide skin when aluminium welding.;FALSE;The different material transfers (arc types) depending on the amperage.;TRUE;8
9=MC;The arc ignition...;...is a question of the arc-characteristic.;FALSE;...is on purpose proceeded by a short circuit.;TRUE;...is only started via high frequencies.;FALSE;...is favoured by a high current density.;TRUE;...is mainly effected by a long arc.;FALSE;4
10=MC;Which of the following statements concerning charged particles in the arc area are correct?;The negative pole is always at the anode.;FALSE;The electrodes gather at the cathode.;FALSE;Anions do not occur in the arc.;FALSE;Positive ions can receive a high kinetic energy.;TRUE;The electron flow moves towards the anode.;TRUE;2
11=MC;The charged particles in the arc are created by?;Dissociation followed by ionisation of molecules.;TRUE;Mechanical friction.;FALSE;Emission procedures.;TRUE;They are only created by high welding voltages.;FALSE;They only exist in metallic conductors.;FALSE;2
12=MC;Which of the following statements concerning the operating spot when arc welding are correct?;The operating area is always situated in the Ayrton area.;FALSE;The operating area amends its position when the arc changes.;TRUE;The operating area is situated in the intersection of the power supply and the arc characteristic.;TRUE;The operating area does not change its position when the welding current increases.;FALSE;The operating area does not depend on the welding speed.;TRUE;5

[1.05-1-a]
Anzahl=3
1=MC;The material transfer when welding...;...is not influenced by the oxygen content.;FALSE;...is always triggered by the expanding gases in the weld pool.;FALSE;...can be desired during the short circuit.;TRUE;...should, if possible, always be triggered by the pinch-effect.;FALSE;...is highly influenced by the viscosity and the surface voltage.;TRUE;7
2=MC;A pinch-effect...;...is based on the effect of magnetic fields (“Lorenz-force”);TRUE;...is triggered by very high oxygen contents.;FALSE;...is created once the arc fully surrounds the electrode end.;TRUE;...can be influenced by the choice of the welding shielding gas.;TRUE;...is only created with alternating current (neutral current direction).;FALSE;8
3=MC;What is correct concerning the arc:;It is created by the combustion of the electrode coating.;FALSE;It consists of plasma.;TRUE;It is created by the high kinetic energy of the drop.;FALSE;It burns between clamp and electrode.;FALSE;It acts like an Ohm resistance.;TRUE;1

[1.06-1]
Anzahl=11
1=MC;Which of the following statements concerning the dividing of power supplies for arc welding are correct ?;In case of the welding rectifier the rectifying diodes are placed on the primary circuit.;FALSE;In case of the welding rectifier the rectifying diodes are placed on the secondary circuit.;TRUE;Clocked power supplies can be clocked on the primary and the secondary circuit.;TRUE;Clocked power supplies can only be clocked on the primary circuit.;FALSE;Welding converter can only be run with the three-phase AC.;FALSE;3
2=MC;Which of the following statements concerning the dividing of power supplies for arc welding are correct ?;The transductor controls the height of the secondary AC.;TRUE;the transductor is only installed in welding transformers.;FALSE;Welding rectifiers are always primary clocked.;FALSE;Both primary and secondary clocked power supplies exist.;TRUE;Welding rectifier does always have a thyristor rectifier.;FALSE;3
3=MC;The electric behaviour of a welding transformer for arc welding can be described as follows:;Simplified the secondary circuit is a serial circuit with one restitance connected to a voltage source.;FALSE;Simplified the secondary circuit is a seriel circuit with two resistances connected to a voltage source.;TRUE;Simplified the secondary circuit is a parallel circuit with two resistances connected to a voltage source .;FALSE;If the arc increases the internal resistance of the voltage sources also increases.;FALSE;A shorter arc results in higher welding current.;TRUE;4
4=MC;The characteristics of a welding transformer for arc welding can be described as follows:;Due to an electrical behaviour welding transformers cannot be used for processes which request a constant voltage characteristic.;FALSE;According to the applied welding process welding transformers are produced with drooping or constant voltage characteristics.;TRUE;Welding transformers can reduce the life endangering high mains voltages to a, for the welder, not dangerous level. ;TRUE;At welding transformers the welding voltage is always controlled by a multiple-contact switch on the primary circuit.;FALSE;The welding current increases proportionally to the number of windings on the primary circuit.;FALSE;5
5=MC;What controls the welding current on the secondary circuit in the case of analogue power supplies for arc welding?;A serial circuit of diodes.;FALSE;Transistors.;TRUE;Thyristors.;FALSE;A cascade connection for changing the number of windings.;FALSE;Analogue power supplies only contain diodes and choke coils on the secondary circuit.;FALSE;9
6=MC;Which of the following indications can be found on the efficiency marking in the information plate of a power supply?;When the power supply has been calibrated last.;FALSE;If the power supply has also been build for usage outside the factory halls.;TRUE;The weight of the power supply.;FALSE;For which welding process the power supply is appropriate.;TRUE;The maximum length of the secondary cables.;FALSE;2
7=MC;The secondary circuit of a power supply can simplified be described as an analogue circuit of an internal voltage power supply and two resistances (internal resistance, arc resistance).;In this case the internal resistance of the power supply and the arc resistance are parallel connected. With a higher welding current (smaller arc) the voltage “breaks” because of the internal voltage supply.;FALSE;In this case the internal resistance of the power supply and the arc resistance are connected in line. With a higher welding current (smaller arc) the higher current creates a higher voltage decrease.;TRUE;The welding voltage cannot be influenced by the internal resistance of the power supply but only by the arc resistance.;FALSE;The height of the arc resistance depends on the arc length and the welding current.;FALSE;A shorter arc lowers the total resistance of the power supply and therefore also the welding current.;FALSE;4
8=MC;At the welding current power supplies with electric current servo positioner transistors and thyristors are used to vary the output voltage of the power supply.;The assembly of the rectifier is at all power supply designs ONLY to be found on the secondary circuit since the transformer only transfers AC. ;FALSE;Because of the principle of the clocked source a larger amount of electric energy is absorbed and in the arc converted into thermal energy than in the case of non-clocked power supplies.;TRUE;The clock rate (the switch frequency of the transistors) is 20 – 50 kHz.;FALSE;In the case of primary clocked power supplies the volume and the weight of the transformer can greatly be decreased. This results in highly increased electrical losses in the transformer.;FALSE;The dynamic behaviour (ignition, re-ignition characteristics, short circuit current) is in the case of clocked power supplies only determined by the choke coil.;FALSE;10
9=MC;Please complete the following statement: In the case of a welding rectifier the diodes connected in the rectifying block serve for...;suppressing the negative half-wave.;FALSE;changing the negative half wave into a positive.;TRUE;continuously adjusting the height of the direct welding current.;FALSE;in this case the remaining ripple of the DC is only depending on the amount of used diodes.;FALSE;in the case of all power supplies rectifiers are only to be found at the secondary circuit.;FALSE;7
10=MC;The transformer is the mostly used welding power supply, besides the welding converter. Which connection varieties reduce in practice the output voltage of the transformer?;By the reduction of the number of windings on the primary circuit via a multiple-contact switch.;FALSE;By the reduction of the pre-magnetisation DC in the case of a transductor.;TRUE;By moving the scattering kernel situated in the transformer the magnetic flow has an alternative route and density of the magnetic flew is reduced at the secondary windings.;TRUE;By the increase of an ohm resistance which is connected in front of q to the transformer.;FALSE;By the increase of the pre-magnetisation DC in the case of a transductor.;FALSE;5
11=MC;Depending on the diameter of the electrodes to weld a more or less high current output is demanded from the welding transformer. At where spot is this “current setting” to to be reached in a power supply?;only at the primary of the transformer.;FALSE;only at the secondary of the transformer.;FALSE;only in the magnetic cycle (packet) of the transformer.;FALSE;at the primary, the secondary and in the magnetic cycle of the transformer.;TRUE;only at the secondary and in the magnetic cycle of the transformer.;FALSE;5

[1.06-2]
Anzahl=9
1=MC;You see an extract of an output plate of a power supply. Which of the following statements could be taken from the illustration?;The welding current which can be taken from the power supply at a break time of 35 %.;FALSE;The welding current which can be taken from the power supply at a duty cycle of  35 %.;TRUE;At a duty cycle of 50 % a current of 121 A can be taken from the power supply.;TRUE;The border temperature of the power supply is at 155 °C.;FALSE;The maximum short circuit current is 250 A.;FALSE;5;Schild.png
2=MC;Which of the following statements concerning the setting range of a power supply for arc welding are correct?;The crossing points of the middle power supply characteristics with the standardised arc resistance characteristic result in the setting range.;FALSE;The crossing points of the lowest and highest power supply characteristics with the standardised arc resistance characteristics result in the setting area.;TRUE;The crossing points of the short circuit current and the lowest and the highest power supply characteristics with the standardised arc resistance characteristics result in the setting range.;FALSE;The crossing points of the short circuit current and the two medium power supply characteristics with the standardised arc resistance characteristics result in the setting range.;FALSE;The crossing points of the no load voltage of the lowest and the highest power supply characteristics with the standardised arc resistance characteristics result in the setting range.;FALSE;7
3=MC;Which of the following statements concerning no-load voltage of a power for arc welding are correct?;The mains voltage is also defined as no-load voltage.;FALSE;The no-load voltage is indicated on the output plate.;TRUE;The height of the no-load voltage is not important for the practical run of the power supply.;FALSE;The height of the no-load voltage restricts the area of usage of the power supply.;TRUE;The height of the no-load voltage is only indicated at power supplies for TIG welding.;FALSE;8
4=MC;Which of the following statements concerning no-load voltage are correct?;Power supplies which have the letter “S” indicated on its output plate are only built for the use with increased electric danger.;FALSE;Before welding areas of increased electrical danger are to be marked with a warning sign showing a capitalised “S”.;FALSE;At power supplies which are produced for working in areas of with increased electrical danger the maximum no-load alternating voltage is at 48 V effective.;TRUE;At power supplies which are produced for working in areas of increased electrical danger the maximum no-load alternating voltage is at 113 V maximum value.;TRUE;Also working areas with increased ambient temperature and/or humidity count as areas of increased electrical danger.;TRUE;8
5=MC;Which of the following statements concerning the dynamic characteristics of an arc welding power supply are correct?;The ignition and re-ignition characteristics mainly depend on the dynamic characteristics of the power supply.;TRUE;The ignition and re-ignition characteristics mainly depend on the static characteristics of the power supply.;FALSE;The dynamic characteristics are only determined by the transformer.;FALSE;The dynamic characteristics of the power supply are only determined by the choke.;FALSE;The dynamic characteristics of the power supply could also be determined by an appropriate software/controlling electronic.;TRUE;1
6=MC;Which of the following statements concerning power supply characteristics are correct?;With the drooping characteristic the voltage decreases in the usual welding area by more than 7 V per 100 A.;TRUE;If the voltage in the usual welding area does practically not vary at a change of the arc length it is spoken of a constant power supply.;FALSE;With the drooping characteristics the voltage is practically constant in the usual welding area if the arc length changes .;FALSE;With the drooping characteristics the current is practically constant in the usual welding area if the arc changes.;FALSE;With the constant current characteristics the voltage is practically constant in the usual welding area at an arc changes.;FALSE;4
7=MC;The necessary amount of heat for welding is determined by the height of the current and the current flow time. In this case a significantly alternating arc resistance has a negative effect on the continual heat input. The stabilised characteristic shape can have a positive impact on the heat input.;This is the reason why the increasing characteristics is perfect for manual electric welding processes.;FALSE;This is the reason why the drooping characteristics is used for manual electric and TIG welding processes.;TRUE;Therefore the welding current at the constant current characteristics is equal in its height to the short circuit current.;TRUE;Therefore the constant current characteristics is categoric to the partly and fully mechanised welding processes.;TRUE;If the voltage decreases by more than 7 V per 10 A welding current it is talked of a drooping characteristics.;FALSE;4
8=MC;Which of the following statements concerning arc characteristics and the standardised working voltage with the manual electric welding processes are correct?;Point 1: power supply characteristics at 35 % duty cycle.;TRUE;Point 2: power supply characteristics at 100 % duty cycle.;FALSE;Point 3: maximum approachable arc current.;FALSE;Point 4: standardised arc characteristics with Us = 22V + 0.07 * Is;FALSE;Point 5: standardised arc characteristics with Us = 20V + 0.04 * Is;TRUE;6;Lichtbogenk.png
9=MC;For which welding process should a power supply with an output plate containing among others, the illustrated indications be used?;Cannot be defined with these indications.;FALSE;For TIG and metal shielding gas welding.;FALSE;For manual electric welding.;TRUE;For metal shielding gas welding.;FALSE;For TIG welding at places with increased electrical danger.;FALSE;6;Schild.png

[1.07]
Anzahl=12
1=MC;The shielding gas welding processes are allocated to the following energy carriers:;Welding by electric gas discharge.;TRUE;Welding by gas.;FALSE;Welding by movement.;FALSE;Welding by current.;FALSE; Welding by liquid.;FALSE;1
2=MC;Inert gas welding is divided into two categories:;Fusion and pressure welding;FALSE;MIG and MAG welding;FALSE;TIG and MAG welding;FALSE;Gas-shielded metal arc-welding and gas-shielded tungsten arc-welding;TRUE;Process with depositing and non-depositing electrode.;TRUE;1
3=MC;The TIG process belongs to the processes with...;...depositing electrode;FALSE;...non-depositing electrode;TRUE;...active shielding gases;FALSE;...inert shielding gases;TRUE;...very high deposition efficiency.;FALSE;2
4=MC;The gas-shielded metal arc-welding is mainly subdivided into:;MIG and MAG welding;TRUE;MAG-M and TIG welding;FALSE;MIG and TIG welding;FALSE;MAG-C and MAG-M welding;FALSE;Plasma and MAG welding;FALSE;
5=MC;When MAG welding the following shielding gases are used:;C2H2;FALSE;Propane;FALSE;Pure argon;FALSE;Argon rich shielding gases with active components;TRUE;Argon/O2-, argon/CO2-, argon/O2/CO2-mixtures;TRUE;5
6=MC;When inert gas welding the shielding gas has the following tasks:;Cooling the welding area.;FALSE;Cooling the electrode.;FALSE;Protecting the electrode and the welding pool from oxidisation.;TRUE;Cooling the torch.;TRUE;Creation of charge carriers.;TRUE;5
7=MC;When TIG welding the following gases according to DIN EN 439 are used.;M21;FALSE;C1;FALSE;I1, I2, I3;TRUE;R;TRUE;F;FALSE;5
8=MC;Which of the following gases are basic shielding gases when inert gas welding ?;Butane;FALSE;Helium;TRUE;Neon;FALSE;Argon;TRUE;Natural gas;FALSE;5
9=MC;With increasing active gas content when MAG welding (M1 – M3)...;...the oxidisation on the seam surface decreases.;FALSE;...the spatter formation increases.;TRUE;...the burnout of the alloy elements decreases.;FALSE;... it results in lower mechanical and technical characteristics.;TRUE;...it results in higher mechanical and technical characteristics.;FALSE;5
10=MC;In Europe the basis of all shielding gases for gas-shielded welding is...?;argon;TRUE;helium;FALSE;CO2;FALSE;oxygen;FALSE;nitrogen;FALSE;
11=MC;A shielding gas with the standardised designation M21 contains:;3 – 30 % CO2;FALSE;5 – 25 % CO2;TRUE;0 – 5 % O2;FALSE;0 – 5 % CO2;FALSE;0 – 5 % CO2 and 3 – 10 % O2;FALSE
12=MC;To the shielding gases and shielding gas mixtures for MAG-M welding belong:;Pure carbon dioxide;FALSE;Argon;FALSE;Argon-CO2-mixture;TRUE;M31;TRUE;I2;FALSE;5

[1.07-a]
Anzahl=4
1=MC;Shielding gases of the group I3 are mainly used for...; TIG direct current welding of steel.;FALSE;TIG alternating current welding of thick aluminium.;TRUE;TIG alternating current welding of thin aluminium.;FALSE;pulsed arc welding of aluminium.;FALSE;pulsed arc welding of steel.;FALSE;5
2=MC;Which of the following statements concerning inert gas welding are correct?;The kind of the gas and the inserted electrode enables a separation into different processes.;TRUE;It is always welded with a depositing electrode.;FALSE;It is always welded with a non-depositing electrode.;FALSE;Non-depositing electrodes are used for gas-shielded tungsten arc-welding.;TRUE;Non-depositing electrodes are used for gas-shielded metal arc-welding.;FALSE;1
3=PU;Please move with your left mouse button pressed six of the eight pictures in the rectangle on the right-hand side in order to create a gas-shielded tungsten arc-welding diagram..;wsg1.png;wsg2.png;wsg3.png;wsg4.png;wsg5.png;wsg6.png;wsg7.png;wsg8.png;2
4=MC;Which of the following statements concerning gas-shielded tungsten arc-welding are correct?;It is worked with a depositing electrode.;FALSE;It is worked with a non-depositing electrode.;TRUE;The shielding gas is usually inert.;TRUE;The shielding gas is usually active.;FALSE;The electrode is at the same time filler.;FALSE;2

[1.08-1]
Anzahl=12
1=MC;Which of the following statements about the TIG process are correct?;The welding machine basically consists of: Power supply, shielding gas source, hose package and the welding torch.;TRUE;The power supply has slightly falling characteristics.;FALSE;The power supply has constant current characteristics.;TRUE;The welding torch contains a tightly clamped tungsten electrode.;TRUE;The welding torch is always water-cooled.;FALSE;2
2=MC;The TIG-welding belongs to the processes...;gas shielded arc welding with melting electrode.;FALSE;pressure welding without melting electrode.;FALSE;gas shielded arc welding without melting electrode.;TRUE;fusion welding without melting electrode.;TRUE;fusion welding with melting electrode.;FALSE;2
3=MC;The TIG-welding is a universally usable welding process, because...;the addition of fillers and the welding current are connected.;FALSE;this process can be used for all positions.;TRUE;this process is only used for steel.;FALSE;this process is used for all work materials which are appropriate for fusion welding;TRUE;it is worked with a very high melt-off efficiency.;FALSE;4
4=MC;With TIG-welding the following materials can be welded:;Plastics;FALSE;Aluminium and aluminium alloy;TRUE;Ceramics;FALSE;(St 37) S235;TRUE;X2 CrNi 18 10;TRUE;3
5=MC;The advantages of TIG-welding are:;High heat output;FALSE;High deposition rate;FALSE;No spatter formation;TRUE;Adaptable to automation;TRUE;Welding always without filler;FALSE;3
6=MC;TIG-welding is mainly used at plate thicknesses of:;0.1 – 2 mm;FALSE;5 – 50 mm;FALSE;0.4 – 5 mm;TRUE;10 – 15 mm;FALSE;0.1 – 0.5 mm;FALSE;3
7=MC;For TIG-welding mainly of the following inert gases are used:;Argon;TRUE;Ar-CO2-mixtures;FALSE;Argon-helium-mixtures;TRUE;Argon-hydrogen-mixtures;TRUE;Argon-oxygen-mixtures;FALSE;3
8=MC;The advantage of the TIG-pulse welding in comparison to welding with constant current is:;High melt-off efficiency possible;FALSE;Equipment easy to set up;FALSE;Welding torches are cheaper;FALSE;Low distortion of equipment parts;TRUE;Better out-off position ability;TRUE;5
9=MC;The TIG-welding torch basically consists of:;Handgrip and hose connections;TRUE;Oxygen valve;FALSE;Torch body and torch cap ;TRUE;Shielding gas nozzle and electrode collect;TRUE;Injector nozzle;FALSE;6
10=MC;With the TIG-welding torches, the following torch types are used:;Air-cooled welding torches;TRUE;Injector welding torches;FALSE;Bunsen burner;FALSE;Water-cooled welding torches;TRUE;Welding torch mixer;FALSE;7
11=MC;The electrodes for TIG-welding consist of:;Pure tungsten;TRUE;The same composition as the base material;FALSE;Solid wire electrodes;FALSE;Cored wire electrodes;FALSE;Tungsten-thorium;TRUE;9
12=MC;In the DIN EN 26848 the tungsten electrodes are split up in:;Pure tungsten electrodes.;TRUE;Tungsten-carbide electrodes.;FALSE;Basic electrodes.;FALSE;Tungsten-thorium electrodes.;TRUE;Tungsten with oxide additives.;TRUE;

[1.08-1-a]
Anzahl=2
1=MC;The shape of the tungsten electrode endings influences?;The penetration;TRUE;The welding speed;FALSE;The melt-off efficiency;FALSE;The metal transfer;FALSE;The heat output;FALSE;10
2=MC;At the TIG-welding the electrode consists mainly of:;Pure tungsten.;TRUE;Doped tungsten.;TRUE;Solid steel analogue to the base material;FALSE;Filler wire of different compositions;FALSE;Titanium;FALSE;9

[1.08-2]
Anzahl=6
1=MC;Please mark the right statements concerning with defects at TIG aluminium welding.;Pores are a sign for a lack of argon;FALSE;Pores are a sign for dirty workpieces;TRUE;A fluttering arc can be due to a dirty electrode tip;TRUE;A low penetration can be due to a dirty electrode tip;TRUE;A faulty melting is due to a lack of argon;FALSE;6
2=MC;At TIG welding aluminium and its alloys it is worked with direct current because...;the tungsten electrode is thermally overloaded.;FALSE;the tungsten electrode has to cool down during the negative half wave;TRUE;the oxide is destroyed at the positive half wave;TRUE;at the positive half wave the so called cleaning effect comes up.;TRUE;no cleaning effect comes up;FALSE;2
3=MC;When TIG aluminium welding it is...;worked with alternating current.;TRUE;worked with pulsed current.;TRUE;only worked with negative polarity of the tungsten electrode.;FALSE;only worked with positive polarity of the tungsten electrode.;FALSE;worked with negative polarity of the tungsten electrode and pure helium as shielding gas.;TRUE;2
4=MC;When TIG aluminium welding the following shielding gases are used:;Argon;TRUE;Argon-helium-mixtures;FALSE;Helium;TRUE;Argon-helium-mixtures;TRUE;Argon-CO2-mixtures;FALSE;4
5=MC;Helium in the shielding gas argon at TIG aluminium welding has the effect of...;a low welding voltage;FALSE;a higher welding speed;TRUE;a light penetration;FALSE;lower pre-heat temperature;TRUE;higher porosity;FALSE;4
6=MC;The TIG aluminium welding with positive polarity of the electrodes...;...is always used.;FALSE;...is especially used at thick materials.;FALSE;...is in special cases also used at thin aluminium.;TRUE;...is only used in automatic applications.;FALSE;...is extremely expensive.;FALSE;3

[1.09-1]
Anzahl=6
1=MC;Which of the following statements about gas metal arc welding are correct?;The filler material is supplied manually.;FALSE;The filler material is supplied automatically.;TRUE;The metal inert gas welding is a type of gas metal arc welding.;TRUE;TSG-process is a type of gas metal arc welding.;FALSE;The MSA-process is a type of the gas metal arc welding.;FALSE;1
2=DD;Please move, with the left mouse button pushed, one of the three images below into the red square to complete the diagram.;msg.png;msg2.png;msg1.png;msg3.png;662;346;1
3=PU;Please move, with the left mouse button pressed, six of the eight images into the square at the right side to create a gas metal arc welding torch.;brenner1.png;brenner2.png;brenner3.png;brenner4.png;brenner5.png;brenner6.png;brenner7.png;brenner8.png;8
4=MC;The gas metal arc welding is split up into:;MIG and MAG-welding;TRUE;MIG and TIG-welding.;FALSE;MAG and MAG-M-welding.;FALSE;Welding with depositing and non depositing electrode;FALSE;Process with active and inert shielding gases.;TRUE;1
5=MC;In contrast to TSG-welding, with gas metal arc welding there (is)...;the filler is supplied from the roll.;TRUE;the electrode is also a filler.;TRUE;the filler is supplied from the side in form of a rod.;FALSE;it is worked with higher deposition efficiency.;TRUE;worked without filler.;FALSE;2
6=MC;With gas metal arc welding the following materials are used:;Only NI-metals;FALSE;highly alloyed types of steel.;TRUE;Low alloyed types of steel.;TRUE;Only aluminium and its alloy.;FALSE;High strength and heat resistant types of steel.;TRUE;1

[1.09-2]
Anzahl=12
1=MC;Please mark the correct statements about kinds of arcs in the gas metal arc welding process.;In the case of short arc the metal transfer only takes place during a short circuit.;TRUE;In the case of the transfer arc the metal transfer only works without short circuit.;FALSE;In the case of the long arc the metal transfer only works without short circuit.;FALSE;In the case of the pulsed arc, the metal transfer only works during a short circuit.;FALSE;In the case of the pulsed arc the metal transfer only works without short circuit.;TRUE;1
2=MC;When gas metal arc-welding, depending on the shielding gas and the amperage there are typical kinds of metal transfer.;Spray arc;TRUE;pulsed arc;TRUE;Short arc;TRUE;Alternating current arc;FALSE;Plasma arc;FALSE;1
3=MC;The short arc can be described as follows:;Metal transfer during short circuit.;TRUE;Coarse drops at metal transfer.;FALSE;Metal transfer without short circuit.;FALSE;Uneven metal transfer.;FALSE;In phase with the pulse frequency.;FALSE;1
4=MC;The spray arc can be described as follows:;Metal transfer during short current.;FALSE;Practically without short circuit.;TRUE;Fine and finest drops at metal transfer.;TRUE;Coarse drops at metal transfer.;FALSE;In phase with the pulse frequency.;FALSE;1
5=MC;Next to the classic arc areas short arc and spray arc when gas metal arc-welding there are additional areas, such as:;Long arc;TRUE;Rotation arc.;TRUE;TIG-arc.;FALSE;TIG-pulsed arc.;FALSE;Metal arc.;FALSE;2
6=MC;The classic short arc area of usage is...:;...in the area of thick plate welding for fill and cover pass.;FALSE;..in the area of thin plate welding for root welding.;FALSE;...only in PA position ;FALSE;...in all positions.;TRUE;...in the area of thick plate welding for root welds.;TRUE;3
7=MC;The transfer arc area should be avoided if possible because...;...the metal transfer takes place during the short circuit.;FALSE;...the metal transfer is very irregular (short circuits and short circuit-free transfers).;TRUE;...of little spatter ejection.;FALSE;...of extreme spatter ejection.;TRUE;...it is almost welded without spatters.;FALSE;3
8=MC;When gas metal arc-pulsed welding the drop transfer takes place...;...during the short circuit.;FALSE;...controlled during background current period.;FALSE;...controlled during pulse current period.;TRUE;...by the pinch effect during background current period.;FALSE;...by pinch effect during pulse period.;TRUE;5
9=MC;The advantages of pulse welding are as follows:;Use only in PA position;FALSE;Increase in spatter formation in the whole operating range.;FALSE;Low spatter formation in whole operating range.;TRUE;Welding machines at low costs.;FALSE;Low heat input.;TRUE;5
10=MC;The arc voltage when MAG-welding is mainly influenced by...;...the used shielding gas.;TRUE;...the amperage.;TRUE;...the welding speed.;FALSE;...the amount of shielding gas.;FALSE;...the relative humidity.;FALSE;
11=MC;When MAG-mixed gas welding of low alloyed steel the with preference used shielding gas is:;CO2;FALSE;mixed gases of group M1.;FALSE;mixed gases on the basis of argon/O2.;TRUE;mixed gases of group M2.;TRUE;only mixed gases of group M3.;FALSE;11
12=MC;When MAG-pulse welding of low alloyed steel the with preference used shielding gas is:;Gas mixture of group M2.;TRUE;Gas mixture of group M3.;FALSE;Pure CO2.;FALSE;Argon-helium-mixtures.;FALSE;Shielding gases with a high amount of CO2.;FALSE;13

[1.09-2-a]
Anzahl=1
1=MC;The standards for wire electrode diameters for gas metal arc welding are between...;2 – 4 mm;FALSE;0.8 – 1.2 mm;TRUE; 0.1 – 0.6 mm;FALSE;1.2 – 2.4 mm;TRUE;the only norm is at 1.2 mm.;FALSE;

[1.10-1]
Anzahl=8
1=MC;Which of the following statements about the magnetic blowing effect are right?;By using alternating current the magnetic blowing effect can be strongly reduced.;TRUE;By using alternating current the magnetic blowing effect cannot be reduced.;FALSE;The magnetic blowing effect is independent of the geometry of the piece to weld.;FALSE;By using a reciprocate pole the blowing effect it can be opposed.;TRUE;The magnetic blowing effect can be opposed by appropriate electrode ;TRUE;3
2=MC;In the case of a basic electrode it is usually agreed on that:;It is welded with the positive pole.;TRUE;It is welded with the negative pole.;FALSE;It is always welded with alternating current.;FALSE;The power supply determines the polarity.;FALSE;Mainly welding transformers are used.;FALSE;1
3=MC;The cellulosic type...;...is a typical electrode type for vertical down welding;TRUE;...creates medium amounts of slag.;FALSE;...contains in the coating mainly cellulose.;TRUE;...creates brilliant values of toughness.;FALSE;...creates medium and good values of toughness.;TRUE;6
4=MC;A basic type electrode...;...is always welded with the positive pole.;TRUE;...contains high amounts of calcium fluoride.;TRUE;...creates a weld with very low content of hydrogen.;TRUE;...creates medium values of toughness.;FALSE;...is extraordinarily good for welding purposes.;FALSE;6
5=MC;The drop transfer of an electrode is...;coarse at the cellulosic type.;FALSE;very thin at the basic type.;FALSE;medium to fine at the rutile type.;TRUE;coarse at the acid type.;FALSE;unimportant for welding characteristics.;FALSE;5
6=MC;The deposition efficiency of stick electrodes...;is only dependent on the welding amperage.;FALSE;is the same as in the case of gas metal arc welding.;FALSE;is increasable by metal powder in the coating.;TRUE;is a question of electrode manipulation.;FALSE;is also determined by the thickness of coating.;TRUE;8
7=MC;The manual metal arc welding is defined by:;The welder.;FALSE;The arc as heat source.;TRUE;The self-creation of shielding gases.;TRUE;The type of alloy of the welding additive.;FALSE;The kind of the added shielding gas.;FALSE;1
8=MC;The advantages of the manual metal stick electrode welding in comparison to the gas metal arc welding are:;High deposition efficiency.;FALSE;Low creation of slag.;FALSE;Less electrode change.;FALSE;Low investments demanded.;TRUE;Easier to handle.;TRUE;1

[1.10-2]
Anzahl=4
1=MC;Which of the following processes are part of the metal arc welding?;Manual metal arc welding.;TRUE;Friction welding.;FALSE;Gravity arc welding.;TRUE;Electro-slag-welding.;FALSE;Shielding gas-welding.;FALSE;1
2=MC;Which of the statements about metal arc welding are correct?;It includes all welding processes with metal electrodes.;FALSE;It is supposed to separate from all light beam processes.;FALSE;It creates a shielding gas which results from a combustion.;TRUE;It also includes the submerged-arc welding.;FALSE;It also includes self-protecting flux core wires.;TRUE;1
3=MC;Which statements about stick electrodes are correct?;They can be deposited with the gravity arc welding process.;TRUE;By using iron powder in the coating a higher deposition efficiency can be achieved.;TRUE;They cannot be produced with a core rod diameter of more than 6.0 mm.;FALSE;When gravity arc welding a welder can simultaneously weld at different places.;TRUE;They cannot be used in the overhead positions.;FALSE;2
4=MC;A self-protecting flux core wire...;...is only welded manually.;FALSE;...can also be used in a light breeze.;TRUE;...creates in addition to shielding gas also slag.;TRUE;...can also be welded when shielding gas is added.;TRUE;...the only advantage is a higher deposition efficiency.;FALSE;7

[1.11-1]
Anzahl=5
1=MC;Please mark the correct statements concerning submerged arc welding.;It is a fully mechanised welding process.;TRUE;Its use usually just makes sense starting from a material thickness of 30 mm.;FALSE;Its use usually just makes sense starting from a material thickness of 6 mm.;TRUE;It is used for cladding work since during the process a strong dilution of the base material is caused.;FALSE;It is used for cladding work since during the process a weak dilution of the base material is caused.;TRUE;2
2=MC;Which are the tasks of the welding flux when submerged arc welding?;The welding flux serves to increase the conductivity of the arc gap.;TRUE;To avoid the extreme creation of slag.;FALSE;It is supposed to faster cool down the seam.;FALSE;It serves for an increase of the arc resistance.;FALSE;It serves for the shielding gas flow formation.;TRUE;8
3=MC;Which statements concerning submerged arc welding are correct?;Usually it is welded with the negative pole of the wire electrode by using direct current.;TRUE;If the wire electrode diameter exceeds 3 mm a downward current characteristic is used (external regulation).;TRUE;In the case of a smaller wire electrode diameter it is worked with a constant voltage characteristic (internal regulation);TRUE;Usually the power supplies are clocked.;FALSE;Usually the power supplies are pulsed.;FALSE;
4=MC;Which rules of thumb concerning submerged arc welding are correct?;For selecting the wire electrode diameter: I = 100 to 200 * wire diameter.;TRUE;For the welding speed: v = amperage I / 10 * thickness of plate t;FALSE;For selecting the wire electrode diameter: I = 200 to 300 * wire diameter.;FALSE;For the extend of penetration with the square butt joint: t approx. 1mm per 100 A.;TRUE;For the extend of penetration with the Y-butt joint: t approx. 0.7 mm per 100 A.;TRUE;5
5=MC;What is stipulated for the welding fillers when submerged arc welding?;The carbon content of the filler S1 is at 0.08 to 0.09 %.;FALSE;With high amperage wire electrodes with a diameter of 5 mm are used.;TRUE;The welding fillers for high alloyed steel can be found in DIN 8557.;FALSE;When fabricating Cr-Ni-steels wire electrodes of a 3 mm diameter are used.;TRUE;By danger that the root might collapse 3 mm wire electrodes are used. ;TRUE;7

[1.11-2]
Anzahl=5
1=MC;Please mark the correct answers concerning tandem submerged-arc welding.;It is welded with two wire electrodes;TRUE;Only one power supply is needed.;FALSE;Two power supplies are needed.;TRUE;The blowing effect can be influenced by the polarity of the power supply.;TRUE;It is welded with two strip electrodes.;FALSE;2
2=MC;Which of the following defects are part of the “internal” defects of submerged-arc welding?;Metallurgic pores.;TRUE;Penetration notches.;FALSE;Slag inclusion.;TRUE;Root-side suckback;FALSE;Lamella tearing.;TRUE;6
3=MC;Which of the following defects are part of the “external” defects of submerged-arc welding?;Seam reinforcement.;TRUE;Penetration notches.;TRUE;Slag inclusions.;FALSE;Drop-through root / root side suckback.;TRUE;Pores.;FALSE;6
4=MC;Which steps are necessary to avoid penetration notches?;Optimise welding voltage.;TRUE;Increase welding speed.;FALSE;Optimise position of welding wire.;TRUE;Lower welding speed.;FALSE;Choose different flux.;TRUE;6
5=MC;Which steps are necessary in order to avoid insufficient through-welding.;Lower amperage.;FALSE;Increase welding speed.;FALSE;Better alignment of construction pieces.;TRUE;Lower welding speed.;FALSE;Select different flux.;FALSE;6