[2.01]
Anzahl=10
1=MC;Please, mark the most important iron ores.;Magnetite;TRUE;Hematite;TRUE;Siderite;TRUE;Bauxite;FALSE;Corundum;FALSE;1   
2=MC;Please, mark the right answers concerning sintering.;At first the fine iron ore is dampened.;TRUE;At first the fine iron ore is dried.;FALSE;The fine iron is agglomerarted.; FALSE;The ore particel are fused together by carbon combustion.;TRUE;The conglomerate is crushed by special machines into the required particle size.;TRUE;2
3=MC;Which mentioned furnaces are used for reduction?;Refining furnace;FALSE;Blast furnace;TRUE;Hearth furnace;FALSE;Melting reduction furnace;TRUE;Direct reduction furnace;TRUE;2
4=MC;Please, mark the right answers concerning refining.;Subsequent treatment from pig iron to steel.;TRUE;A process to create high grade steel from raw steel.;FALSE;A reduction process to reduce the oxygen content.;FALSE;A process to bring pig iron to a wild melt.;TRUE;In Europe the continiuous casting is used for refining.;FALSE;2
5=MC;Please, mark those questions with right answers concerning Siemens-Martin-Process.;Processing in a hearth furnace using regenerative firing.;TRUE;Air and burnable fuel are preheated together in one vessel before blowing into the hearth.;FALSE;Air and burnable gas are seperate preheated before the injection into the hearth.;TRUE;Exhausted gases developed during the process should be removed as fast as possible, otherwise impurities could appear.;FALSE;Due to the lower processing temperatures the addition of scrap is impossible.;FALSE;4
6=MC;Please, mark those questions with right answers concerning the electric arc furnace process.;The heating process is done by electric current.;TRUE;Process is done is exclusively by means of induction:;FALSE;Also in this process scrap can not be used, since the process temperatures are too low.;FALSE;The advantage of the process is, that no impurities are injected.;TRUE;Hereby the final product is casting steel.;FALSE;6
7=MC;Please, mark right the statements about the classification of steels.;Low alloyed are steels that generally do not contain more than 15% alloying components.;FALSE;High alloyed steels have more than 15% alloying components.;FALSE;Basic steels are unalloyed steels with quality requirements that can be complied with without special measures during manufacture.;FALSE;All unalloyed steels that are not classified according to the basic steels or high grade steels are unalloyed quality steels.;TRUE;High grade steels have a higher grade in purity, in particular concerning non-metallic inclusions than quality steels.;FALSE;10
8=MC;Please, mark the right statements about the denomination of steels.;Main symbols are set together by a letter giving information on about the application of the steel and the description of the material properties.;TRUE; After a letter there is a number which points out the optimum welding temperature.;FALSE;After a letter there is a number which shows the minimum yield strength.;TRUE;Main symbol „A“ is representing general construction steels.;FALSE;Main symbol „E“ is representing mechanical engineering steels.;TRUE;11
9=MC;Please, mark the right statements about the denomination of steels.;The standard DIN EN 10027, part 1, specifies the rules for the designation of the steel.;TRUE;For a clear identification of a steel, both standards DIN EN 10027 part1 and ECISS-information IC 10 are necessary.;TRUE;There are two kinds of additional symbols: one for steel and the other for steel products.;TRUE;Three types of additional symbols are distinguished.;FALSE;The additional symbols are regulated according IB 10.;FALSE;11
10=MC;Please, mark the right answers concerning the steel numbers.;The standard DIN EN 10027 part 2 specifies the steel numbers.;TRUE;The definition of standard DIN EN 10027 part 2 is almost identically with DIN 770017 part 2.;FALSE;The material numbers are meaningful if long material designations can be replaced by small numbers.;TRUE;The definition of standard DIN EN 10027 part 2 is almost identically with DIN 17007 part 2.;TRUE;The main material number for steel is 4.;FALSE;13

[2.02-1]
Anzahl=9
1=MC;Please mark the right answers about the tensile test.;The test gives information about the ductility of a material.;TRUE;The flat tensile test specimen is configured so that welding seam, HAZ and parent material are directly stressed.;TRUE;The flat tensile test specimen is configured so that only the welding seam is stressed.;FALSE;It serves for the determination of firmness and deformation behaviour of welded joints transverse to the welding seam.;TRUE;It serves for the determination of firmness and deformation behaviour of welded joints longitudinally to the welding seam.;FALSE;2
2=MC;Please mark the right answers about the tensile test.;The tensile strength is the quotient from the initial section and the highest force.;FALSE;The tensile strength is the quotient from the highest force and the initial section;TRUE;The tensile yield strength is defined as a tension, that leads to an increasing extension during which the traction power remains or descents for the first time.;TRUE;The upper tensile yield strength depends on the extension speed.;TRUE;The upper yield strength is independent from the extension speed.;FALSE;4
3=MC;Please mark the right answers concerning the determinable  material parameters during the tensile test.;The enlongation of a material at fracture indicates the ductility of the material.;TRUE;The elongation at fracture of a material is independent from the ductility.;FALSE;The elongation at fracture depends on the relationship of sample length and sample thickness.;TRUE;The elongation at fracture is independent from the relationship of sample length and sample thickness.;FALSE;The elongation at fracture is build up of uniform elongation and necking elongation.;TRUE;6
4=MC;Please mark the right answers concerning yield strength.;Materials with a constant transition between elastic and plastic shape, the yield strength is determined instead of the upper and lower tensile yield strength.;TRUE;All materials have a continous transition between elastic and plastic shape.;FALSE;As in case of the tensile yield strength, the yield strength depends on the increasing tension speed.;TRUE;As in case of the tensile yield strength, the yield strength is independent from the increasing tension speed.;FALSE;The yield strength is the point of a certain plastic elongation.;TRUE;5 
5=MC;Which are the correct answers concerning the hardness testing?;Mostly the test specimen is unusable after the test.;FALSE;Mostly the test specimen is still usable after the test.;TRUE;According to the statement of A. Martin the hardness of a material is the resistance against the penetration of another, even harder material.;TRUE;For hardness testing those processes with remaining indentations are preferred.;TRUE;For hardness testing those processes are preferred which have no remaining indentation.;FALSE;7
6=MC;Please mark the correct answers concerning hardness test according to Brinell?;Using a hardened, pyramid shapedsteel or hard metal tip.;FALSE;Using a hardened steel ball or a ball made from hard metal.;TRUE;It is replacing the tension test completely.;FALSE;It is possible to transfer the result of the hardness test (Brinell), with help of certain tables, into tensile strength.;TRUE;Hardness according to Brinellis the sum of testing force and remaining indentation.;FALSE;8
7=MC;Please mark the right answers concerning the hardness test according to Vickers.;Using a hardened steel ball or a hard metal ball.;FALSE;Using a four-sided diamond pyramid.;TRUE;There is less inaccuracy of the hardness test according to Vickers compared to the hardness test according to Brinell due to the higher precision of reading.;TRUE;There is less inaccuracy of the hardness test according to Brinell compared to the hardness test of Vickers due to the higher precision or reading.;FALSE;Due to the small indentations of a material with high hardness or hardness differences, the hardness test according to Vickers has large scattering range.;TRUE;9
8=MC;Please mark the right answers concerning the hardness test according to Rockwell.;Advantage of a short time expenditure and the possiblity of a fully automatic capture of the measuring valves.;TRUE;Penetration depth is taken as a measurement  for hardness.;TRUE;Using the diameter of indentations as a measurement for hardness.;FALSE;Finely polished surface.;FALSE;a blank surface is sufficient.;TRUE;9
9=MC;Please mark the right answers concerning the hardness test on weld joints.;Usually using the hardness test according to Vickers testing forces  of 49 to 98 Newton are used.;TRUE;Only in exceptions the hardness tet according to Vickers is used.;FALSE;Only single or individual indentations are used.;FALSE;According to the requirements sequences or individual indentations can be used.;TRUE;The critical area of a welded joint is the HAZ.;TRUE;10

[2.02-2]
Anzahl=4
1=MC;Please mark the right answers concerning the notched impact test.;The test is standarized according to EN 10045.;TRUE;The test is standarized according to EN 10875.;FALSE;Gives information about the obstructed deformability of a material, that means 3-dimtension.;TRUE;The test report gives a least information about the position of the test piece, notch position and testing temp.;FALSE;The notch base should be optically free of striations which run parallel to the notch axis.;TRUE;1
2=MC; Please mark the right answers concerning the technological bending test.;This is an uneconomical and unusual test.;FALSE;Testing of the deformability of a weld joint.;TRUE;The bending test is the cheapest and simplest method of testing the deformability of a weld joint.;TRUE;During the test a load falls on the specimen.;FALSE;Only transverse bend test specimen are standarized.;FALSE;4
3=MC;Please mark the right answers concerning the fracture test.;The standard DIN EN 1320 only determinates the test execution.;TRUE;The standard DIN EN 1320 determinates the specimen dimensions and the test execution.;TRUE;Gives information about type, extent and distribution of internal irregulations.;FALSE;No information about deficient penetration from fracture test.;FALSE;All given answers are wrong.;FALSE;6
4=MC;Please markt the right answers concerning the Drop-weight-Test (DWT) according to Pellini.;DWT is a test procedure where the behaviour of a material on a brittle, extending crack is investigated.;TRUE;The specimen is bended slowly.;FALSE;It is proven that the NDT-temperature is lower than the prescripted testing temperature or the exact value of the NDT-temp. is to be determinated.;TRUE;During the determination of the NDT-temperature usually 6 to 8, but 3 at least , test pieces are tested at constant temp.;FALSE;During the determination of the NDT-temperature usually 3 to 6, but 3 at least, test pieces are tested at different temperatures;TRUE;7 

[2.03-1]
Anzahl=10
1=MC;When is a bonding thermodynamically stable?;When the respective (potential) energy curve takes in a minimum.;TRUE;When the respective (potential) energy curve takes in a maximum.;FALSE;When the attractive and repelling forces are in an equilibrium.;TRUE;When the repelling forces are larger than the attracting forces.;FALSE;When the repelling forces are smaller than the attracting forces.;FALSE;2
2=MC;What are the characteristics of a ionic bonding?;It has no electrostatic (Coulomb) attracting forces.;FALSE;It is a directed bonding.;FALSE;There are electrons that belong to the whole lattice structure.;FALSE;It relies on the exchange of electrons.;TRUE;Substances with a prevailing ionic bonding are good electric conductors.;FALSE;2
3=MC;What are the characteristics of an atomic bonding?;Due to the existence of valence angles it is a directed bonding.;TRUE;Due to the interaction of the atoms so called sub levels are generated.;FALSE;The gain in energy required for the bonding results from the penetration or overlapping, respectively, of orbitals.;TRUE;It is a very weak bonding.;FALSE;Several electron pairs may participate in the bonding.;TRUE;2
4=MC;What are the characteristics of a metallic bonding?;It is a directed bonding.;FALSE;Substances having a metallic bonding distinguish themselves by an excellent electric conductivity.;TRUE;The atomic bodies are hold together by a so called electron gas.;TRUE;This type of bonding usually leads to a small filling of space of the lattice structure.;FALSE;The energy gain required for the bonding results from the formation of super levels (hyper orbitals).;FALSE;2
5=MC;Which of the following crystal systems is the most symmetrical one?;tetragonal;FALSE;monoclinic;FALSE;triclinic;FALSE;hexagonal;FALSE;cubic;TRUE;3
6=MC;Which of the following crystal systems is the most asymmetrical one?;tetragonal;FALSE;monoclinic;FALSE;triclinic;TRUE;hexagonal;FALSE;cubic;FALSE;3
7=MC;How many atoms does a cubic face centered elementary cell have?;1;FALSE;2;FALSE;3;FALSE;4;TRUE;6;FALSE;4
8=MC;How many atoms does the elementary cell of a hexagonally closest spherical packing have?;1;FALSE;2;FALSE;3;TRUE;4;FALSE;6;FALSE;4
9=MC;In which sequence does the packing density of crystal systems increase?;cubic body centered – cubic face centered – hexagonal primitive;FALSE;cubic primitive – hexagonal primitive – hexagonal closest packing;TRUE;cubic face centered – hexagonal closest packing – cubic closest packing;FALSE;cubic primitive – cubic face centered – cubic body centered;FALSE;hexagonal primitive – cubic body centered – cubic closest packing;TRUE;4
10=MC;What are the characteristics of the coordination number?;It is a characteristic for a substance.;TRUE;It indicates the number of possible orbitals of an atom.;FALSE;It characterizes the packing density of a crystalline body.;TRUE;It is the number of the next neighbors placed at the same distance around an erratic central lattice component.;TRUE;In crystals with ionic bondings no coordination number can be indicated.;FALSE;4

[2.03-2]
Anzahl=10
1=MC;Which kind of site changing mechanism is prevailed in kfz-structures?;Substitutional mechanism;FALSE;Vacancy mechanism;TRUE;Interstitial mechanism;FALSE;Ring-mechanism;FALSE;Kation and anoin exchange-mechanism;FALSE;1
2=MC;Mark the right answers concerning heterogenous nucleation;Heterogenous germs are formed during soldification.;FALSE;Heterogenous germs are formed by seed crystalls or crystalls of fine grain elements.;TRUE;The heterogenous nucleation is sort of a allotropic transformation.;TRUE; Almost exclusively takes place during welding.;FALSE;The nuclei are mostly formed at defect locations of the lattice.;TRUE;2 
3=MC;Which ways of heat treatment are used for age-hardening?;Quenching and tempering;FALSE;Solution heat treatment;TRUE;Tempering;TRUE;Quenching;FALSE;Artificial ageing;TRUE;3
4=MC;Which prerequisites for alloys must be given for ageing?;They have to solute a sufficient amount of one alloying element.;TRUE;The solubility for the alloying element has to be declined with a decreasing temperature.;TRUE;They must have at least one phase with a temperature dependently solubilitiy.;TRUE;They have to form a high number of dislocations during solution annealing.;FALSE;The crystall structure must change during quenching to form different phases.;FALSE;3
5=MC;What are the characteristics of coherent precipitations?;The lattice of the matrix and of the precipitation are coherent.;FALSE;The lattice of the martix and of the precipitation are congruent.;TRUE;Precipitation and matrix are made of the same crystall structure.;TRUE;The crystall structure of the precipitation is different from the matrix structure.;FALSE;The atomic spacing of matrix and precipitation are different.;TRUE;3
6=MC;During the artificial ageing at certain temperature and time the strength of a Material will change in which way?;Increasing strength – reaching a maximum strength – decreasing strength;TRUE;Constant strenght;FALSE;Increasing strength – reaching a maximum strength – constant strength;FALSE;Continiously increasing strength;FALSE;Increasing strength- reaching a maximum- further increasing strength;FALSE;5
7=MC;What are the main effects of lattice obstacles like e.g. precipitations on the Mechanical properties of a material?;Decreasing fracture elongation;TRUE;Decreasing strength;FALSE;Increasing hardness;TRUE;Constant yield strength;FALSE;The yield strength is reaching the tensile yield strength;FALSE;3
8=MC;What are the causes for strain ageing?;Elimination of hydrogen at the grain boundaries;FALSE;Elimination of carbon at lattice defects after quenching from the austenitic area;FALSE;Elimination of nitrogen at dislocations due to cold forming;TRUE;Resolving of phases during artifical ageing;FALSE;Precipitation hardening and embrittling due to the contents of nitrogen and phosphorous;TRUE;4
9=MC;How do dislocations have influence on the mechanical property of a material?;With a low concentration they create the possibility of an easier plastic deformation;TRUE;Reducing of the inner stress of the material;FALSE;Influence on the elimination of foreign atoms in the lattice;TRUE;Are responsible for the superannuation of an aged material;FALSE;With a higher number they are leading to a higher material strength;TRUE;
10=MC;What kind of processes occur during recovery annealing?;Recovery of spot shaped lattice defects;TRUE;Dissolution of dislocations;TRUE;Building of new crystalls;FALSE;Recovery of micropores and microcracks;FALSE;Due to polygonisation sub-grain boundaries are formed;TRUE;5
 
[2.04-1]
Anzahl=12
1=MC;The transition liquid/solid of a single component crystalline material has the following effects:;The distribution of the atoms becomes more regular.;TRUE;The fraction solid/liquid is changed when heat is removed, the temperature is kept constant.;FALSE;The fraction solid/liquid is changed when heat is removed, the temperature is reduced.;FALSE;The heat content of the system remains constant at the change of phase.;FALSE;The solidification heat is a latent heat.;TRUE;2 
2=MC;Which of the following statements are correct for the formation of germs?;The driving power for the formation of germs decreases with supercooling.;FALSE;With further increasing supercooling the formation of germs becomes more difficult.;TRUE;With the heterogeneous formation of germs crystallization can be initiated at a relatively low supercooling.;TRUE;The higher the number of germs the more coarse grained the solidified structure will become.;FALSE;With increasing supercooling the germ radius starting from which the germs are able to grow increases.;FALSE;3
3=MC;What are the main typical components a solid alloy is basically composed of?;Dislocations;FALSE;Solid solutions;TRUE;Intermetallic compounds;TRUE;Pure elements;TRUE;Inclusions;FALSE;4
4=MC;What examination methods can be applied in order to set up phase diagrams?;Diffractometer investigations;TRUE;Differential thermal analysis;TRUE;Dye penetrant testing;FALSE;Measurements of internal stresses;FALSE;Dilatometer measurements;TRUE;5
5=MC;What are the characteristics of a phase diagram?;It is valid for the thermodynamic state of equilibrium;TRUE;The independent variables are temperature, composition and enthalpy;FALSE;The influence of the cooling rate during the generation of the phases is considered.;FALSE;There is no equalization of concentration of the components in the solid state;FALSE;In a binary system more than two phases can be at an equilibrium with each other.;TRUE;5
6=MC;Which are the basic types of binary systems?;Complete solubility in the solid state and complete insolubility in the liquid state;FALSE;Complete solubility in the liquid state and complete insolubility in the solid state.;TRUE;Complete insolubility in the liquid state and limited solubility in the solid state.;FALSE;Complete solubility in the liquid state and limited solubility in the solid state.;TRUE;Complete solubility in the liquid state and complete solubility in the solid state.;TRUE;5 
7=MC;What are the characteristics of an incongruently melting compound?;It is a compound formation with an open maximum.;FALSE;It is a compound formation with a covered maximum.;TRUE;Compounds of this type are generated during cooling when a peritectic reaction takes place.;TRUE;Compounds of this type generally do not have a range of solubility for the initial components.;FALSE;An example for compounds of this type is Mg2Si;FALSE;16
8=MC;Which of the following statements concerning phase diagrams are correct?;A mixing gap is a homogeneous region with the so called segregate lines as border lines.;FALSE;A conode connects the liquidus and the solidus line at constant temperature.;TRUE;The line that is cut first during solidification is called solidus line.;FALSE;The ideal cooling curves of the pure metals have a point of recalescence.;FALSE;The eutectic temperature TEU is above the solidification temperatures of the initial components A and B.;FALSE;9
9=MC;Which statements for the system Cu-Ni are true?;In the phase diagram Cu-Ni there is the heterogeneous phases Cu-Ni.;TRUE;Cooling curves of the alloy constantan show a total of two knees.;TRUE;In the binary system Cu-Ni there are the homogeneous phases melt, solid solution and intermetallic compound.;TRUE;A melt consisting of Cu and Ni will only modify the ratio solid/liquid during its solidification.;FALSE;The solid solutions crystallizing from a melt consisting of Cu-Ni contain more Cu and less Ni than the initial composition of the weighted sample.;FALSE;6 
10=MC;For the number of degrees of freedom of a thermodynamic equilibrium is valid:;It indicates the minimum number of state variables that can be modified without changing the number of phases.;FALSE;It can be calculated using the rule of Gibbs.;TRUE;At a two phase equilibrium a binary system has the degree of freedom of  F = 1.;FALSE;A one-component system has at the triple-point (three phase equilibrium) the degree of freedom F = 1.;FALSE;State parameters free to select are pressure, temperature and concentration (composition).;TRUE;8
11=MC;The eutectic reaction  for the cooling process is:; S + //a//-Mk //=> b//-Mk;FALSE; //b//-Mk => S + //a//-Mk;FALSE; //a//-Mk + //b//-Mk => S;FALSE; S + //b//-Mk => //a//-Mk;FALSE; S => //a//-Mk + //b//-Mk;TRUE;13
12=MC;In a eutectic binary system with limited solubility in the solid state at the eutectic temperature the maximum solubility of the component B in the a-solid solution is 12 weight% and of the component A in the ß-solid solution amounts to 18 weight%. The eutecticum consists of 58 weight% A and 42 weight% B. What is the eutectic structure composed of?;43 % //a//-Mk + 57 % //b//-Mk;FALSE;57 % //a//-Mk + 43 % //b//-Mk;TRUE;50 % //a//-Mk + 50 % //b//-Mk;FALSE;67 % //a//-Mk + 33 % //b//-Mk;FALSE;33 % //a//-Mk + 67 % //b//-Mk;FALSE;21

[2.04-2]
Anzahl=12
1=MC;Which of the following processes is an allotropic transformation?;The transition liquid – solid;FALSE;The transition from one type of crystal lattice into another.;TRUE;The segregation of two phases in the solid state.;FALSE;The transition from the ferromagnetic into the paramagnetic state.;FALSE;The transition from a cubic space centered crystal lattice into the hexagonally closest spherical packing.;TRUE;1 
2=MC;Which are the points or temperatures of transition that occur with pure iron?;A1 = 723 °C;FALSE;A2 = 210 °C;FALSE;A3 = 911 °C;TRUE;A4 = 1493 °C;FALSE;A5 = 1536 °C;FALSE;1
3=MC;Which statements for the double diagram Fe-C are correct?;In the meta stable system the carbon is present as graphite.;FALSE;The temperatures of the ternary equilibria of the Fe with the C of the stable system are higher than those of the meta stable system.;TRUE;Fe-C alloys having less than 0.8 % C are called steel, those having more than 0.8 % C are called cast iron.;FALSE;Cementite contains 4.3 weight percent carbon.;FALSE;Cementite contains 25 % atomic percent carbon.;TRUE;2
4=MC;In the phase diagram Fe-Fe3C the following homogeneous or heterogeneous phases exist :; //d//-Mk + //a//-Mk;FALSE; //g//-Mk;TRUE; //d//-Mk + Fe3C;FALSE; //a//-Mk + //g//-Mk + Fe3C;TRUE; //a//-Mk + melt + Fe3C;FALSE;3
5=MC;In the phase diagram Fe-Fe3C the following homogeneous or heterogeneous structures exist:;austenite + primary cementite;FALSE;austenit + perlite;FALSE;sekundary cementite + perlite + ledeburite I;FALSE;//a//-ferrite + perlite + sekundary cementite;FALSE;primary cementite + ledeburite II;TRUE;3
6=MC;The intermetallic compound Al2Cu is stoichiometrically composed of 66.67 atomic % Al and 33.33 atomic % Cu. Which is the composition in weight percent (rounded up) ;46,0 weight % Al / 54,0 weight % Cu;TRUE;54,0 weight % Al / 46,0 weight % Cu;FALSE;86,0 weight % Al / 14,0 weight % Cu;FALSE;82,5 weight % Al / 17,5 weight % Cu;FALSE;17,5 weight % Al / 82,5 weight % Cu;FALSE;3
7=MC;Which are the fractions (rounded up) of d-ferrite and melt for a complete peritectic transformation to austenite?;69% //d//-ferrite + 31% melt;FALSE;85% //d//-ferrite + 15% melt;TRUE;15% //d//-ferrite + 85% melt;FALSE;31% //d//-ferrite + 69% melt;FALSE;83% //d//-ferrite + 17% melt;FALSE;7
8=MC;The maximum solubility of carbon in d-ferrite is:;0,02 weight %;FALSE;0,1 weight %;TRUE;0,16 weight %;FALSE;0,51 weight %;FALSE;0,8 weight %;FALSE;7
9=MC;Which of the following statements for the solidification of an Fe-C alloy with 1.8 weight % C are correct?;Melt and austenite will enrich carbon.;TRUE;The melt reaches the eutectic composition of 4.3 weight %.;FALSE;The austenite reaches its maximum solubility on C of 2.06 weight %.;FALSE;When reaching the line E-S primary cementite will be precipitated from the austenite.;FALSE;When reaching the line E-S, the austenite will deplete of carbon up to 0.8 weight %.;TRUE;2
10=MC;Which are the differences between Ledeburite I and Ledeburite II?;Ledeburite I consists of d-ferrite and austenite.;FALSE;Ledeburite I consists of perlite and cementite.;FALSE;Ledeburite II consists of cementite and austenite.;FALSE;Ledeburite II consists of a-ferrite and austenite.;FALSE;Ledeburite II consists of a-ferrite and Fe3C.;TRUE;7
11=MC;The eutectoid reaction for the cooling process is:; S + //d//-Mk => //g//-Mk;FALSE; //g//-Mk => //a//-Mk + Fe3C;TRUE; //a//-Mk => //g//-Mk + Fe3C;FALSE; //a//-Mk + Fe3C => //g//-Mk;FALSE; austenite => perlite;TRUE;7
12=MC;The solubility of C is reduced from max. 0.02 weight % to approx. 0.006 weight %. Which phase is precipitated from the //a//-ferrite during cooling?Primary cementite.;FALSE;Secondary cementite.;FALSE;Tertiary cementite.;TRUE;Perlite.FALSE;Fe3C;FALSE;7

[2.04-3]
Anzahl=3
1=MC;Which are the right answers concerning perlite?;The carbon content of perlite is always 0,25%.;FALSE;The carbon content of perlite is always 2,06%.;FALSE;Perlite is a mixure of ferrite and austenite.;FALSE;Perlite is a mixure of ferrite and zementite.;TRUE;The carbon content of perlite is always 0,8%.;TRUE;2
2=MC;An increasing cooling speed creates........;A dense lamellar perlite.;TRUE;A wide lamellar perlite.;FALSE;Has no influence on the perlite structure.;FALSE;An increasing solubility of carbon in the perlite structure.;FALSE;A granular perlite.;FALSE;2
3=MC;The transformation into the bainite stage is characterized by...;diffusion inside the gamma-iron.;FALSE;diffusion inside the gamma-iron, then a transformation into the bainite stage.;FALSE;Lattice shearing.;FALSE;Diffusion inside the gamma-iron, lattice shearing, diffusion inside alpha- and gamma-iron.;TRUE;Diffusion inside the gamma-iron, shearing into bainite stage.;FALSE;3

[2.05-1]
Anzahl=8
1=MC;Please mark the correct answers.;A: The lower critical cooling speed is the point where the formation of martensite starts.;TRUE;The lower critical cooling speed is the point where the structure consists of 100% martensite.;FALSE;The upper critical cooling speed is the point where the first formation of martensite starts.;FALSE;The upper critical cooling speed is the point where the structure constists of 100% martensite.;FALSE;A structure consisting of only martensite can be found between the upper and lower critical cooling speed.;FALSE;3
2=MC;Which kind of stages can be found in a continious ttt-diagram for pre-eutectoid steels?;Ferrite stage;TRUE;Curie stage;FALSE;Cementite stage;FALSE;t8/5 stage;FALSE;bainite stage;TRUE;4
3=MC;Every continious ttt-diagram shows:;transformation of austenite during different cooling speeds.;TRUE;transformation of austenite as a function of time.;TRUE;transformation of austenite between upper and lower critical cooling speed.;FALSE;transformation of austenite into ferrite, perlite, cementite and martensite.;FALSE;transformation of austenite for pre-eutectoid steels and their structures.;FALSE;1
4=MC;Of which kind of structures does a steel 25CrMo4 consist during a isothermal cooling from the austenite stage?;Ferrite and bainite;FALSE;ferrite, bainite and martensite;FALSE;ferrite, perlite and martensite;FALSE;ferrite, perlite and bainite;TRUE;bainite;TRUE;8
5=MC;Of which kind of structures does a steel 25CrMo4 consist during a continious cooling from the austenite stage.;Ferrite and bainite;FALSE;ferrite, bainite and martensite;TRUE;ferrite, perlite and martensite;FALSE;ferrite, perlite and bainite;TRUE;bainite;TRUE;8
6=MC;In which way does the austenite transformation occur in a isothermal ttt-diagram?;Rapid cooling to transformation temperature, holding temperature and quenching.;FALSE;Rapid cooling to transformation temperature, holding at transformation temperature until the austenite has changed totally.;TRUE;Rapid cooling to 500°C, holding at 500°C and queching from the bainite stage.;FALSE;Rapid cooling to transformation temperature, holding at transformation temperature until first transformation starts, then cooling.;FALSE;Rapid cooling to transformation temperature and holding at constant temperature (isothermal) until a structure of ferrite and cementite is formed, then cooling down to room temperature.;FALSE;7
7=MC;What kind of influence do the alloying elements Cr and Mn have?;Cr increases the perlite stage and decreases the bainite stage.;TRUE;Cr decreases the perlite and bainite stage.;FALSE;Cr decreases the martensite start temperature.;TRUE;Mn increases the perlite stage and decreases the bainite stage.;FALSE;Mn decreases the perlite and bainite stage.;TRUE;10
8=MC;What kind of information does a ttt-diagram give?;area of martensite formation;TRUE;Ac2-Temperature;FALSE;Content of structures in % after cooling;TRUE;the warm-hardness in HV or HRC;FALSE;the martensite finish temperature;FALSE;2

[2.05-2]
Anzahl=10
1=MC;Phosphorous is a ferrouscompanion. Which are the effects of phosphorous?;a better notch ductility;FALSE;a reduced notch ductility;TRUE;leads to hot cracks;FALSE;leads to a better weldability;FALSE;Deoxidation effect based on Fe-P formation;FALSE;4
2=MC;Manganese is a desired ferrouscompanion because of;a deoxidation effect of the element.;TRUE;it is reducing the strength.;FALSE;impeding the Fe-S formation.;TRUE;an increasing ductility with simultaneous strength.;TRUE;the formation of Mn3C which increases the wear resistence.;FALSE;
3=MC;Which materials are classified as steel?;materials with content of 3% C and 2%Si.;FALSE;materials with content of <1% C and total alloying elements (Cr, Ni, Mn, Si) content less than 5%.;TRUE;Iron-materials with Ni-contents of 60-70%.;FALSE;material X1NiCrMoCu31-27-4.;TRUE;material GJS-400-18.;FALSE;1
4=MC;Steel is an alloy of.....?;Iron and carbon (less than 2%);TRUE;Iron, carbon and graphite;FALSE;cast iron containing alloying elements like Cr and Ni;FALSE;Iron, carbon, ferrouscompanions with alloying elements like Cr and Ni (in total up to 55%, for example 25%Cr and 30%Ni);TRUE;Copper and Nickel, which are leading to an extreme hardness;FALSE;1
5=MC;The alloying element nitrogen has the following effects on the steel properties;preventing ageing;FALSE;supplying ageing;TRUE;supplies the formation of the austenite;TRUE;supporting grain growth at fine grain steels;FALSE;increasing ductility;FALSE;5
6=MC;Aluminium has positive effects on the steel quality like;formation of Al-S which prevents hot cracking;FALSE;formation of Al-carbides which increases the weldability;FALSE;formation of Al-N which prevents ageing;TRUE;formation of Al2O3 and deoxidation;TRUE;formation of Al-N which leads to coarse grain;FALSE;3
7=MC;The element Sulphur in steel has the effect of;at killed steel the segregation of sulphur;FALSE;cold cracking during welding;FALSE;hot cracking during welding;TRUE;the formation of MnS which may lead to lamellar tearing;TRUE;improving the notch bar impact work;FALSE;4
8=MC;The alloying element Nickel has which supporting effect on the steel properties;toughness;TRUE;hardenability;TRUE;brittleness;FALSE;formation of ferrite;FALSE;weldability;FALSE;8
9=MC;The properties of steel could be regulated by carbon and alloying elements.Carbon has the effect of;increasing strength;TRUE;increasing toughness;FALSE;increasing weldability;FALSE;reducing hardness;FALSE;increasing deep drawability;FALSE;8
10=MC;Carbon in steel has the effect of;hardenability, if the carbon content is more than about 0,22%;TRUE;good weldability, if the content is below 0,22%;TRUE;martensite formation if the content is less than 0,022%;FALSE;reduced weldability if the content is about more than 0,022%;FALSE;reducing resistance of wear if the content oversteps 0,8% (formation of ferrite structures);FALSE;2

[2.06-1]
Anzahl=10
1=MC;Which kind of heat treatments for steels are possible?;Normalizing;TRUE;Cooking;FALSE;Hardening;TRUE;Refining;FALSE;Stress relief annealing;TRUE;2
2=MC;What is the temperature area for coarse grain annealing?;30 - 50 C°;FALSE;1050 - 1250 C°;FALSE;600 - 800 C°;FALSE;950 - 1100 C°;TRUE;450 - 600 C°;FALSE;5
3=MC;What is the definition for normalizing?;heating up of material to 30-50°C above the Ac3-line for hypoeutectoid steels. For hypereutectoid steels the temperature has to be 30-50°C above the Ac1-line.;TRUE;annealing below the Ac1-line, slow cooling to reduce inner stress of the material.;FALSE;annealing only slightly above the Ac1, in some special cases slightly below Ac1 and slow cooling.;FALSE;annealing above Ac1 and rapid cooling to remain inner material properties.;FALSE;annealing slightly below the Ac3-line and slow cooling.;FALSE;3
4=MC;Which are the right answers concerning recrystallization annealing?;During the cold deformation all plastic deformable structures are streched in the direction of rolling which creates a inner stress inside the material.;TRUE;The approximated recrystallization temperature for all pure metals and alloys can be speculated by Tr = 0,2*Ts;FALSE;With unalloyed steels the recrystallization temperature is between 450 and 700°C.;TRUE;With alloyed steels the recrystallization temperature, depending on the alloy content, is between 300 and 500°C.;FALSE;By means of recrystallization the grains are completly formed again which combine to a high number of fine grain if the temperature is above the recrystallization temperature.;FALSE;9
5=MC;Which heat treatments are subdivisions of hardening?;hardening from the hot-forming heat;TRUE;strew hardening;FALSE;broken hardening;TRUE;martempering;TRUE;seperated hardening;FALSE;1   
6=MC;Which heat treatments do not belong to the patent treatment?;passagen-patent;FALSE;bath-passagen-patent;FALSE;foam-patent;TRUE;dip-passagen-patent;FALSE;air-passagen-patent;FALSE;1
7=MC;Which are the right answers concerning stress-relief annealing?;Stress-relief annealing is a heat treatment at a temperature below the Ac1-line and slowly cooling.;TRUE;Stress-relief annealing is a heat treatment at a temperature above the Ac1-line and rapid cooling.;FALSE;The cooling has to be very fast to avoid internal stress of the material.;FALSE;Uneven heating of a material might cause internal stress.;TRUE;Internal stress can be only relieved by elastic deformation.;FALSE;4
8=MC;What are the connections between transformation points and micro-alloying elements for a perlite reduced steel.Please place the following terms to the right areas.;area 1: Martensite;TRUE;area 2: bainite;TRUE;area 2: martensite;FALSE;area 3: ferrite;TRUE;area 3: austenite;FALSE;12;bild17.png
9=MC;Which kind of annealing is shown by the colored areas in the phase diagram Fe-C?;green area: coarse grain annealing;FALSE;green area: diffusion annealing;TRUE;blue area: recrystallization annealing;FALSE;blue area: stress-relief annealing;TRUE;red area: recrystallization annealing;TRUE;2;ekg.png
10=MC;Which kind of annealing is shown by the colored areas in the phase diagram Fe-C?;green area: diffusion annealing;FALSE;green area: coarse grain annealing;TRUE;red area: melt and austenite;FALSE;red area: hardening and normalizing;TRUE;blue area: austenit and secondary cementite;FALSE;2;ekg2.png



[2.06-2]
Anzahl=5
1=MC;Which are the right statements concerning hardening?;Two types of hardening are distinguished.  1. Normal hardening, 2. Case hardening.;TRUE;during hardening the material is austenized and then quenched;TRUE;The ideal temperature for hardening is about 100-200°C.;FALSE;The quenching process can be done in water, oil or air.;TRUE;The formation of martensite during hardening is continuously.;FALSE;4
2=MC;Please place the right statements;diagram 1: representing broken hardening;FALSE;diagram 1: representing quench hardening;TRUE;diagram 2: representing broken hardening;TRUE;diagram 2: representing martempering;FALSE;diagram 3: representing martempering;TRUE;5;hes98008.png
3=MC;Which are the right statements concerning quenching and tempering?;Is a combination of the heat treatments quenching and tempering.;TRUE;Heating a hardened specimen to a temperature between RT and AC2. Holding this temperature and further cooling, which is called tempering.;FALSE;Heating a hardened specimen to a temperature between RT and AC1. Holding this temperature and further cooling, which is called tempering.;TRUE;The shown structure is a quenched and tempered one.;FALSE;The shown structure is a hardened one.;TRUE;7;2-150r.png
4=MC;Please locate the different ways of hardening to the shown graphs in the diagram.;Curve 1 (puple): broken hardening.;FALSE;Curve 5 (orange): bainitic hardening.;TRUE;Curve 7 (green): patente.;TRUE;Curve 8 (blue): hardening in hot salt solutions.;FALSE;Curve 3 (deep blue): hardening in hot salt solutions.;TRUE;10;Bild12_1.png
5=MC;Please locate the right terms to the shown points / areas in the diagram.;Area 1: cooling in water.;FALSE;Area 1: cooling with air.;TRUE;Area 2: upper point of AC3.;FALSE;Area 2: center of AC3.;TRUE;Area 3: upper point of AC3.;TRUE;12;Bild14.png

[2.07-1]
Anzahl=8
1=MC;Please mark the statements on the suitability for welding that are correct.;The suitability for welding is dependent on the accompanying elements of an alloy.;TRUE;The suitability for welding is independent from the accompanying elements of an alloy.;FALSE; The heat treatment procedures do not have any influence on the suitability for welding.;FALSE;The suitability for welding is dependent on the steel manufacturing process.;TRUE;The suitability for welding is independent from the steel manufacturing process.;FALSE;1
2=MC;Please mark the statements on multi-layer welding that are correct.;Using a multi-layer welding and a partially incomplete recrystallization the mechanical-technological properties will be increased.;TRUE;Using a multi-layer welding and complete recrystallization unfavourable mechanical-technological properties will result.;FALSE;Complete recrystallization leads to favourable mechanical-technological properties.;TRUE;Grain fining beads can be welded on components that have been exerted to particular stresses.;TRUE;The grain fining beads are directly welded above the root layer.;FALSE;3
3=MC;Please mark the statements on hardening increase and pre-heating that are correct.;Crack formation can be avoided by pre-heating.;TRUE;Cracks can be formed due to shrinking stresses and hardening stresses.;TRUE;In order to avoid cracks, the weld seam should be cooled as fast as possible.;FALSE;Also oxygen can participate in the formation of cracks on the underbead.;FALSE;Due to 3-dimensional thermal conduction the heat around the weld seam is piled up at a thick plate.;FALSE;5
4=MC;Please mark the correct K-value for the following values:      C = 0,2 %, Mn = 1.19 %, Cr = 0,6 %, Mo = 0,07 %,                 Cu = 0,5 %;K = 0,75;FALSE;K = 0,57;TRUE;K = 0,14;FALSE;K = 1,32;FALSE;K= 0,32;FALSE;7
5=MC;What is the weldability of a component dependent on?;On the welding possibility.;TRUE;On the preparation for welding.;TRUE;On the welder qualification test  according to EN 287.;FALSE;On the chemical composition of the component.;TRUE;It is independent from the structural design.;FALSE;1
6=MC;Which of the statements on the heat affected zone are correct?;It is dependent on the welding procedure.;TRUE;It is the area of a weld joint > 723°C up to the fusion line.;TRUE;It is influenced by the built-up of the weld seam.;FALSE;It is influenced by the shielding gas used during MAG welding.;FALSE;It is always approx. 5 mm wide.;FALSE;4
7=MC;When can cracks occur on unalloyed and light-alloyed steels?;With hardnesses > 350 HV in the HAZ.;TRUE;With insufficient pre-heating.;TRUE;With ferritic structures in the HAZ.;FALSE;With high martensite content in the HAZ.;TRUE;With values below the critical cooling rate.;FALSE;6
8=MC;What does the carbon equivalent serve for?;It serves to determine the amount of the pre-heating temperature.;TRUE;It serves to calculate the plate thickness of the component.;FALSE;It serves to determine the electrode diameter during manual arc welding.;FALSE;It serves to calculate the influence of the chemical composition of the component on the structural built-up of the HAZ.;FALSE;It is dependent on the actual analysis of the component.;TRUE;7

[2.07-2]
Anzahl=7
1=MC;The cooling time t8/5 is:;The cooling time from 800 to 500°C.;TRUE;B: To be calculated according to SEW 088.;TRUE;Important for the type of casting.;FALSE;Determines the hardness in the HAZ.;TRUE;Is valid for heat resistant steels.;FALSE;3
2=MC;The cooling time t8/5 is determined by:;Heat input per unit length.;TRUE;The type of gas.;FALSE;The welding process.;TRUE;The geometry of the seam.;TRUE;The surface quality.;FALSE;3
3=MC;For pre-heating according to SEW 088 it is valid:;It is determined according to CET.;TRUE;It is to be carried out at temperatures < 5°C.;TRUE;It is determined according to CEV.;FALSE;It is dependent on the limit thickness.;TRUE;It is independent on the Mn content of the material.;FALSE;5
4=MC;Which are the parameters that influence the cold cracking resistance acc. to SEW 088, annex 1?;Chemical composition;TRUE;Type of shielding gas;FALSE;Plate thickness;FALSE;Seam preparation;TRUE;Heat input Q;TRUE;5
5=MC;Which are the factors the transition plate thickness dü is dependent on?;Heat input Q;TRUE;Electrode diameter;FALSE;Weld performance F1, F2,;FALSE;the relative thermal efficiency;TRUE;Pre-heating temperature;TRUE;3
6=MC;Which are the factors that influence the mechanical  properties in the HAZ?;Welding process;TRUE;Welding parameters U, I, v;TRUE; Type of powder during submerged arc welding;FALSE;Coating of the rod electrode;FALSE;Seam geometry;TRUE;1
7=MC;Which of the following factors are considered when calculating the t8/5  time?;Pre-heating temperature;TRUE;Welding rate;TRUE;Type of welder qualification test acc. to EN 287;FALSE;Weld performance;TRUE;Electrode diameter;FALSE;6

[2.08-1]
Anzahl=7
1=MC; Which steels are standardized in the DIN EN 10025?;S 355 N;FALSE;S 235 J2 G3;TRUE;S 355 J2 G3;TRUE;P 355 N;FALSE;E 335;TRUE;2
2=MC;The minimum notch impact energy is on ISO-V specimens for a steel S235 JRG2:;27 J at ± 0°C;FALSE;27 J at + 20°C;TRUE;40 J at + 20°C;FALSE;27 J at - 20°C;FALSE;27 J at - 40°C;FALSE;5 
3=MC;Which supply state is present by the steel S355 J2 G3?;acc. Agreement for long products;TRUE;“M“ for long products;FALSE;“N“ for long products;FALSE;acc. Agreement for flat products;FALSE;“N“ for flat products;TRUE;4
4=MC;The steel S355 J2 G3 C;has a max. carbon content of 0.1 %;FALSE;is particularly suitable to cold formin.;TRUE;is particularly suitable to carburizing;FALSE;is C killed;FALSE;has a CEV lower than 0.1 %;FALSE;1
5=MC;Which of the letter combinations determines the type of casting?;FF= fully killed steel;TRUE;UF = upon manufacturer’s choice;FALSE;FU = killed steel;FALSE;FN = unkilled steel not permitted;TRUE;NN = no indication made;FALSE;1
6=MC;Which designation does the steel St 37-2 of the “former“ DIN 17100 correspond to in DIN EN 10023?;S 355 JR;FALSE;S 235 JR;TRUE;S 235 JR G1;FALSE;S 355 J2 G4;FALSE;S 275 JR;FALSE;3
7=MC;The steel E 335 is a steel;for electrical engineering applications with ReH > 335 N/mm²;FALSE;for mechanical engineering applications with ReH > 335 N/mm²;TRUE;for welding structures made from elecro steel with C < 0.0335 %;FALSE;with a defined C-content of 0.3 – 0.35 %.;FALSE;for pipeline construction applications for particularly high pressures > 335 bar.;FALSE;1

[2.08-2]
Anzahl=5
1=MC;The tube ST37.0 is?;Produced for special applications acc. DIN 1626.;TRUE;Produced for particulary high requirements acc. DIN 1626.;FALSE;Unkilled.;FALSE;Produced for structural steel engineering.;FALSE;Killed.;TRUE;1
2=MC;The pipe L 360 MB is?;A pipe for 360 barr;FALSE;A tube for pipelines conducting combustible  liquids and gases.;TRUE;A tube with boron.;FALSE;A tube thermomechanically rolled.;TRUE;A pipe acc. DIN EN 10 108.;TRUE;3
3=MC;The pipe s 275 JO H...;is produced for tank constructions.;FALSE.;is produced for structural steel engineering.;TRUE;is a hydrogen steel .;FALSE;has a defined minimum value of the impact work at 0°C.;TRUE;is acc. DIN EN 10 208.;FALSE;5
4=MC;The certificate 2.1 acc. DIN EN 10204...;is with mention of test results.;FALSE;is without mention of test results.;TRUE;is validated by the inspector designated in the official regulations.;FALSE;is validated by the manufacturers.;TRUE;is validated by the purchase’s authorized representative.;FALSE;7
5=MC;The certificate 3.1 B acc. DIN EN 10204...;is validated by the manufacturer’s authorized representative.;TRUE;is with results of non-specific testing.;FALSE;is validated by the inspector acc. official regulations.;FALSE;is validated by the manufacturer’s inspector.;TRUE;is a document from the steel commerce.;FALSE;7

[2.09-1]
Anzahl=5
1=MC;Which are the possible causes for hot cracking?;A previous hardening by carbon.;FALSE;The formation of low melting liquid phases.;TRUE;Cooling too rapid after welding.;FALSE;Remelting, low melting phases.;TRUE;Precipitation of nitrides after a period of time.;FALSE;2
2=MC;Name the possibilities for avoiding hot cracking.;Increase heat input (e.g. by oscillating weld beads);FALSE;Decrease heat input (e.g. by stringer weld beads);TRUE;Make solidification fronts meet each other directly, if possible.;FALSE;Design weld bead neither too narrow nor too deep, if possible.;TRUE;Avoid a primarily austenitic solidification with CrNi steels.;TRUE;6
3=MC;What is typical for hydrogen induced cold cracking?;Hydrogen from hydrogen sources has entered the arc.;TRUE;The pre-heating temperature was too high and cooling was too slow.;FALSE;The effusion of hydrogen was not fast enough.;TRUE;Grain boundary cracks were generated by low melting phases.;FALSE;The heat control has not been adapted (rapid cooling to room temperature);TRUE;7
4=MC;How can cold cracking be determined?;Not possible because hydrogen cannot be seen.;FALSE;E.g. by verification of too much hydrogen during welding.;TRUE;Via fractured surface topography (using SEM);TRUE;Via careful ultrasonic and radiographic testing of the welded joint.;TRUE;By measuring of hardness and impact energy of the weld metal.;FALSE;7
5=MC;Why is cold cracking also called “delayed formation of cracks”?;Cracking starts after 10 years.;FALSE;Often the first creation of cracks is detected after several days.;TRUE;Because there is a delayed dissipation of moisture of the hose package.;FALSE;Because there must be several cold cracks first, before they are evaluated as cracking.;FALSE;The hydrogen can cause cracking with a time delay.;TRUE;10

[2.10-1]
Anzahl=5
1=MC;Which mechanism lead to an increase in strength of a fine grain steel?;Precipitation hardening;TRUE;Coarse-grain annealing;FALSE;Solid solution hardening;TRUE;Grain fining;TRUE;Stress relief annealing;FALSE;1
2=MC;Which kind of steels are fine grain steels?;S355 N;TRUE;C45;FALSE;S 355 J2 G3;FALSE;S 460 NL;TRUE;L 360;FALSE;7
3=MC;Which of the elements are micro alloying elements of a fine grain steel?;Nb;TRUE;C;FALSE;Mn;FALSE;V;TRUE;Mo;FALSE;6
4=MC;The designation S 355 NL means?;Fine grained steel with determined values of the impact work at a temperature 50 °C.;TRUE;Fine grained steel for lines.;FALSE;Steel with ReH >= 355 N/mm^2.;TRUE;Structural steel.;TRUE;Steel from Netherlands;FALSE;7
5=MC;The designation S460N + Z35 means?;35mmm thickness product;FALSE;Reduction of area >= 35%;TRUE;ReH>= N/mm^2;TRUE;Steel with inclination to lammellar tearing;FALSE;Steel according to DIN EN 10113;TRUE;8