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Materials Science and Engineering Quiz1. Which of these is an object made with polymers?
The outside of a computer
A penny
An oven-proof casserole dish
A piece of paper
2. What do you call a material that is hard but brittle and is a good insulator?
polymer
semiconductor
metal
ceramic
3. Motors inside cars are mostly made out of this material
polymer
ceramic
metal
none of the above
4. Microchips inside computers are made with silicon which is an example of a
polymer
semiconductor
metal
composite
5. The outside of a modern car is made from fiberglass which is a material called a
polymer
semiconductor
ceramic
composite
6. What unit is one thousandths of a millimeter?
a micron
a meter
a nanometer
an inch
7. What unit is one millionth of a millimeter?
a meter
a micron
a nanometer
a centimeter
8. The Space Shuttle is covered with special tiles which prevent it from burning up upon its return to the atmosphere. These tiles must be a
metal
polymer
semiconductor
ceramic
9. Which of these subjects is important to the field of Materials Science and Engineering?
Physics
Chemistry
Math
all of the above
10. How can you become a Material scientist?
Keep taking Science and Math classes
Continue to be a good problem solver
Look up colleges with Materials Science departments
all of the above
1. A ____________________ is formed when two or more separate materials are combined or mixed.
2. The whole chain of molecules is called a __________.3. ____________________ is a material that is made from silicates.4. ___________________ is anything that occupies space and has mass.5. A __________ describges how a material reacts under certain conditions, such as
when it is heated or wieght is put on it.
Question 1: Microtechnology - study of materials and processes and their interaction, allowing microfabrication of structures of micrometric dimensions, such as ________ (MEMS).
Silicon Microelectromechanical systems Microfluidics Etching (microfabrication)
Question 2: Iron alloyed with various proportions of carbon gives low, mid and ________.
Stainless steel Alloy steel Carbon steel Cast iron
Question 3: ________, some ceramics, and many natural materials are amorphous, not possessing any long-range order in their atomic arrangements.
Glass Cranberry glass Borosilicate glass MACOR
Question 4: ________ – materials that are derived from and/or used with biological systems.
Bacteria Bone Ceramic engineering Biomaterial
Question 5: These characteristics, taken together and related through the laws of ________, govern a material’s microstructure, and thus its properties.
Entropy Thermodynamic equations Statistical mechanicsThermodynamics
Question 6: ________ display varying degrees of crystallinity, and many are completely non-crystalline.
Polymer chemistry Plastic Nylon Polymer
Question 7: See also ________
Near-field scanning optical microscope Mass spectrometry X-ray
crystallography List of materials analysis methods
Question 8: However, modern rheology typically deals with non-Newtonian fluid dynamics, so it is often considered a sub-field of ________.
Continuum mechanics Viscosity Classical mechanics Fluid mechanics
Question 9: ________ – the study of how atoms in a solid fill space, the defects associated with crystal structures such as grain boundaries and dislocations, and the characterization of these structures and their relation to physical properties.
Materials science Condensed matter physics Crystallography X-ray crystallography
Question 10: Materials science has driven, and been driven by, the development of revolutionary technologies such as plastics, semiconductors, and ________.
Bacteria Biomaterial Bone Ceramic engineering
Choose two correct answers.Feedback is given for wrong answers.So if you want to get the feedback, answer correctly to get your score and then deliberately answer incorrectly.
Show questions one by one
1. Sect TWO materials that are suitable for the manufacture of a child's desk or easel.
1.
Polystyrene (HIPS)
Mild steel section.
Rigid PVC
A hardwood such as beech.
2. Check3. Which is the most suitable material to make a safety guard for use on a pillar
drill?Choose two answers.
1.
Mild steel
Transparent Polystyrene
Polycarbonate
Acrylic
4. Check5. Which material is NOT suitable to make a tool box?
1.
Painted mild steel sheet.
Softwood such as pine.
12 mm ply wood
High impact polystyrene.
6. Check7. Which is the most suitable material to make a bottle opener?
1. ? Mild steel (BDMS)2. ? Oak3. ? Acrylic.
4. ? Aluminium8. Choose two suitable materials which could be used to make a garden chair.
1.
Teak
Acrylic
Polystyrene
Cast Aluminium
9. Check10. Which two materials would be most suitable for the manufacture of a seed tray?
1.
Cast iron
A softwood such as pine
HIPS
Acrylic
11. Check12. Which TWO materials would be the most suitable for the manufacture of a toy
truck for a three year old child?1.
PVC (Injection Moulded)
Polythene (Blow Moulded)
Cast iron
Solid beech.
13. Check14. Which TWO materials would be suitable for making a fence post?
1.
Mild steel
Galvanised steel
Softwood
Treated soft wood (tanalised)
15. Check16. Select two suitable materials that could be used to make a barbecue grill.
1.
Stainless steel
Cast iron
Teak
Aluminium
17. Check18. Choose the best TWO materials to make plates that could be used when camping
or on a picnic.1.
China
Melamine
Mild steel
Polypropylene
Thermoplastics2:46
Show questions one by one
1. Which type of plastic is used to make drainpipes, guttering and roofing sheets?1. ? Polystyrene2. ? Nylon3. ? Acrylic4. ? Rigid PVC5. ? Expanded Polystyrene
2. What type of plastic is used to make the following? Carrier bags, dustbin liners squeezee bottles, plastic sheeting used for packing and as damp proof membrane.
1. ? Low density polythene2. ? Acrylic3. ? Rigid PVC4. ? Expanded polystyrene5. ? Nylon
3. What type of plastic is used to make gear wheels, power tool casings, curtain rail fittings, combs, clothing (especially tights and stockings) and fishing lines?
1. ? Polypropylene2. ? Nylon3. ? Acrylic4. ? Cellulose acetate5. ? Polystyrene
4. What type of plastic is used to make photographic film, car steering wheels, transparent flexible box lids and toothbrush handles?
1. ? Low density polythene2. ? Rigid PVC3. ? Cellulose acetate4. ? Acrylic5. ? Expanded polystyrene
5. What type of plastic is used for light units, illuminated signs, aircraft canopies, some plastic baths, some windows, watch and clock "glasses"?
1. ? Polypropylene2. ? Nylon3. ? Acrylic4. ? High density polythene5. ? Rigid PVC
6. What type of plastic is used as sound insulation, heat insulation and as packaging?
1. ? Polystyrene2. ? Expanded polystyrene3. ? Low density polythene4. ? Polypropylene5. ? Nylon
7. What type of plastic is used to make the following items? Crates, rope, medical syringes, carpets, packaging film, chairs, design folders and chemical pipes
1. ? Cellulose acetate2. ? Acrylic3. ? Perspex4. ? Polypropylene5. ? Plasticised PVC
8. What type of plastic is used to make milk crates, bottles, barrels, buckets, bowls and chemical tanks?
1. ? Rigid PVC2. ? Acrylic3. ? Polystyrene4. ? Low density polythene5. ? High density polythene
9. What type of plastic is used to make disposable cups, cutlery, plates model kits, refrigerator linings, cheap toys and disposable food containers?
1. ? Low density polythene2. ? High density polythene3. ? Polystyrene4. ? Acrylic5. ? Expanded polystyrene
10. What type of plastic is used to make hosepipes, electrical wiring insulation, wallpaper, suitcases, floor coverings and sealing compounds?
1. ? Plasticised PVC2. ? Polystyrene3. ? High density polythene4. ? Low density polythene5. ? Acrylic
OK
A Quiz About The Uses of Materials
A multiselect quiz on the uses of materials.2:55
Choose two correct answers.Feedback is given for wrong answers.So if you want to get the feedback, answer correctly to get your score and then deliberately answer incorrectly.
Show questions one by one
1. Which two materials would be most suitable for the manufacture of a seed tray?1.
HIPS
2.
Acrylic
3.
Cast iron
4.
A softwood such as pine
2. Check3. Which TWO materials would be suitable for making a fence post?
1.
Mild steel
2.
Galvanised steel
3.
Softwood
4.
Treated soft wood (tanalised)
4. Check5. Which material is NOT suitable to make a tool box?
1.
Painted mild steel sheet.
2.
Softwood such as pine.
3.
High impact polystyrene.
4.
12 mm ply wood
6. Check7. Choose two suitable materials which could be used to make a garden chair.
1.
Teak
2.
Polystyrene
3.
Cast Aluminium
4.
Acrylic
8. Check9. Which TWO materials would be the most suitable for the manufacture of a toy
truck for a three year old child?
1.
Cast iron
2.
Polythene (Blow Moulded)
3.
PVC (Injection Moulded)
4.
Solid beech.
10. Check11. Choose the best TWO materials to make plates that could be used when camping
or on a picnic.
1.
Melamine
2.
Mild steel
3.
China
4.
Polypropylene
12. Check13. Select two suitable materials that could be used to make a barbecue grill.
1.
Stainless steel
2.
Cast iron
3.
Aluminium
4.
Teak
14. Check15. Sect TWO materials that are suitable for the manufacture of a child's desk or
easel.
1.
Rigid PVC
2.
Mild steel section.
3.
A hardwood such as beech.
4.
Polystyrene (HIPS)
16. Check17. Which is the most suitable material to make a bottle opener?
1. ? Acrylic.2. ? Aluminium3. ? Mild steel (BDMS)4. ? Oak
18. Which is the most suitable material to make a safety guard for use on a pillar drill?Choose two answers.
1.
Acrylic
2.
Mild steel
3.
Polycarbonate
4.
Transparent Polystyrene
19. Check
OK
1. A measure of how easily a material can be scratched or indented.1. ? Hardness2. ? Toughness3. ? Durability4. ? Strength
2. Shiny, hard, heavy, cold to the touch.
1. ? Ceramics2. ? Metals 3. ? Plastics
3. How well a material conducts heat.
1. ? Fusibility2. ? Electrical conductivity3. ? Density4. ? Thermal conductivity
4. The ability to be drawn out into a thin wire or threads.
1. ? Ductility2. ? Elasticity3. ? Plasticity4. ? Brittleness
5. A material that absorbs impact (sudden forces or shocks such as hammer blows)
1. ? Plasticity2. ? Toughness3. ? Malleability4. ? Stiffness
6. Dull sheen (usually), slightly flexible, light weight, can be any colour, warm to the touch.
1. ? Plastics (Polymers)2. ? Ceramics3. ? Metals
7. The ability to withstand environmental attack and decay.
1. ? Stability2. ? Fusibility3. ? Corrosion resistance4. ? Density
8. The ability to withstand pushing or squeezing forces (compression).
1. ? Compressive strength2. ? Brittleness3. ? Stability4. ? Tensile strength
9. The ability of a material to return to its original form after a load has been applied and removed
1. ? Toughness2. ? Tensile strength
3. ? Elasticity4. ? Plasticity
10. The ability to plastically deform and shape a material by forging, rolling or by any other method of applying pressure. Being easy to beat into a thin sheet is the literal meaning
1. ? Ductility2. ? Malleability 3. ? Plasticity4. ? Strength
1. A material that absorbs impact (sudden forces or shocks such as hammer blows)1. ? Stiffness2. ? Malleability3. ? Toughness4. ? Plasticity
2. Shiny, hard, heavy, cold to the touch.
1. ? Plastics2. ? Ceramics3. ? Metals
3. A measure of how easily a material can be scratched or indented.
1. ? Strength2. ? Toughness3. ? Hardness4. ? Durability
4. How well a material conducts heat.
1. ? Thermal conductivity2. ? Fusibility3. ? Density4. ? Electrical conductivity
5. The ability to be drawn out into a thin wire or threads.
1. ? Plasticity2. ? Brittleness3. ? Elasticity4. ? Ductility
6. The ability to withstand environmental attack and decay.
1. ? Fusibility2. ? Density3. ? Corrosion resistance4. ? Stability
7. Dull sheen (usually), slightly flexible, light weight, can be any colour, warm to the touch.
1. ? Metals
2. ? Plastics (Polymers)3. ? Ceramics
8. The ability to withstand pushing or squeezing forces (compression).
1. ? Tensile strength2. ? Compressive strength3. ? Brittleness4. ? Stability
9. The ability of a material to return to its original form after a load has been applied and removed
1. ? Plasticity2. ? Toughness3. ? Elasticity4. ? Tensile strength
10. The ability to plastically deform and shape a material by forging, rolling or by any other method of applying pressure. Being easy to beat into a thin sheet is the literal meaning
1. ? Malleability 2. ? Strength 3. ? Ductility4. ? Plasticity
1. What is the change in length in relation to the applied force called when applying force in the tensile strength test?
Strain
2. What is the point at which the sample will not return to its original size called?
Elastic limit
3. Which hardness test uses a diamond indenter in the shape of a pyramid.1. ? Brinell Test2. ? Vickers Test3. ? Rockwell Test
4. What is the Impact test called
Izod
5. What is the thinning of the test piece called before it finally breaks?
Waisting
6. Which hardness testing machine produces a hardness value measured is an HV value
1. ? Brinell Test2. ? Vickers Test
3. ? Rockwell Test7. What units is stress measured in?
Newtons or kgf
8. What units is the tensile strength test measured in?
N/mm²
9. What is the original hardness test called?
MOHS test
10. What is the point after the elastic limit when extension occurs with no increase in load.
Yield
Type your answer, then press "Check". If you need help, you can click on the "Hint" button to get a free letter.
Show questions one by one
1. What are aids to manufacture called. e.g. for accurate drilling or for lining up components?
CheckHint
2. What is manufacturing in small numbers such as 500 units called?
CheckHint
3. What is the process of checking for accuracy called?
CheckHint
4. In order to save money on storing components they are delivered as needed on the production line. What is this idea called?
CheckHint
5. The limits within which components are manufactured is + or - a %.For example a resistor is manufactured to be + or - 2%. What is this allowance called?
CheckHint
6. When only one product is made as a prototype, craft item or special order such as piece of furniture or a wedding dress, what is the production type?
CheckHint
7. What is the name of the production type when plate glass or petrol is produced?
CheckHint
8. What is the production type invented by Henry Ford which is still used in a similar form to manufacture cars today?
CheckHint
9. When machines are used to replace people completely on a production line, it is known as - ?
CheckHint
10. What does CAM stand for?
1. Which of these adhesives will glue mdf to acrylic?1. ? PVA2. ? Epoxy resin (araldite)3. ? Tensol cement
4. ? Pritt Stick2. Which adhesive will not work well on wood?
1. ? PVA2. ? Epoxy resin3. ? Tensol cement4. ? Synthetic resin (Cascamite)
3. Which adhesive is designed for fixing plastic laminate to MDF or chipboard.
1. ? PVA2. ? Contact Adhesive (Evostick)3. ? Epoxy Resin (araldite)4. ? Hot melt glue
4. Which adhesives can be used when gluing up dovetail or comb(finger) joints? Choose two answers.
1. ? Synthetic resin (cascamite)2. ? Tensol cement3. ? PVA4. ? Hot melt glue (Glue gun)5. ? Contact adhesive
5. Which is the only adhesive which can be used to join metals together?
1. ? Contact adhesive2. ? Hot melt glue(glue gun).3. ? Epoxy resin.4. ? PVA
6. Which of these plastics is a themoplastic - melts or softens with heat.
1. ? Acrylic2. ? Melamine3. ? Bakelite4. ? Polyester resin5. ? Epoxy resin
7. Which of the following is a soft wood?
1. ? Mahogany.2. ? Oak3. ? Jelutong4. ? Beech5. ? Pine
8. What is a common use for polythene?
1. ? Clothes pegs2. ? Windows3. ? Yoghurt pots4. ? Carrier Bags5. ? Plastic knives ,forks and spoons.
9. Which of these is a thermoset - can not be reformed once it has been moulded or SET.
1. ? Polypropylene.2. ? Polyester (PET)3. ? Melamine4. ? Nylon5. ? PVC (poly vinyl chloride)
10. Which of these materials is the strongest?
1. ? Pine2. ? Blockboard3. ? Chipboard4. ? Plywood5. ? MDF
11. Which of these materials is an alloy of copper and tin?
1. ? Brass2. ? Pewter3. ? Bronze4. ? Solder5. ? Amalgam
12. Which of the following materials rusts?
1. ? Lead2. ? Steel3. ? Copper4. ? Aluminium5. ? Stainless steel
13. Which of the following is a ferrous metal?
1. ? Copper2. ? Brass.3. ? Stainless steel.4. ? Aluminium5. ? Bronze
Type your answer, then press "Check". If you need help, you can click on the "Hint" button to get a free letter.
Show questions one by one
1. What are aids to manufacture called. e.g. for accurate drilling or for lining up components?
CheckHint
2. What is manufacturing in small numbers such as 500 units called?
CheckHint
3. What is the process of checking for accuracy called?
CheckHint
4. In order to save money on storing components they are delivered as needed on the production line. What is this idea called?
CheckHint
5. The limits within which components are manufactured is + or - a %.For example a resistor is manufactured to be + or - 2%. What is this allowance called?
CheckHint
6. When only one product is made as a prototype, craft item or special order such as piece of furniture or a wedding dress, what is the production type?
CheckHint
7. What is the name of the production type when plate glass or petrol is produced?
CheckHint
8. What is the production type invented by Henry Ford which is still used in a similar form to manufacture cars today?
CheckHint
9. When machines are used to replace people completely on a production line, it is known as - ?
CheckHint
10. What does CAM stand for?
Quiz: Introduction to Metallurgy
Five-Questions
1.) What metal is inherently brittle with natural occurring defects?
a. Tool Steel b. Alloy Steel c. Cast Iron d. Stainless Steel
2.) What is the most common carbon steel found in boilers, pressure vessels, tanks, and piping?
a. Low Carbon Steel b. Medium Carbon Steel c. High Carbon Steel d. None of the above
3.) Do all stainless steels have the same corrosion resistance?
a. No b. Yes
4.) Why will a weld fail?
a. Poor or improper shape of weld b. Impurities in weld c. Chemical similarities are not the same d. Physical properties are different e. All the above
5.) What is the general cause of corrosion of low carbon steel?
a. Using two-dissimilar metals together b. Being in the presence of moisture or water c. Stray electric currents (very small) d. All the above
http://www.imetllc.com/materials-science-and-engineering-courses/introduction-to-metallurgy-quiz.html
question 1 In a precipitation hardenable alloy (such as the 6061 aluminum alloy), which of the following is true? (Select all correct responses)
A The maximum strength and hardness decreases as the aging temperature increases
B The time to reach maximum hardness increases as the aging temperature increases.
C Using too low of an aging temperature can lead to overaging
D The size of the precipitates decreases as the aging temperature increases.
question 2 As grain size increases, the strength and hardness of a metal
A Decreases
B Increases
C Does not change
D Decreases, then increases
E Increases, then decreases
question 3 Which of the following influences the mechanical properties of a metal?
A Microstructure
B Composition
C The number of dislocations present
D Presence of more than one phase
question 4 Which of the following impede dislocation motion? (Select all correct responses)
A Voids
B Precipitates
C Voids and precipitates
D None of the above
question 5 Which of the following is not a phase transformation? (Select all correct responses)
A Austenite to pearlite
B Precipitation hardening
C Austenite to martensite
D None of the above
question 6 The extent of diffusion can be increased by (Select all correct responses)
A Increasing the temperature
B Adding more of an alloying element
C Increasing the time at an elevated temperature
question 7 The hardness of martensitic steel depends on (Select all correct responses)
A Carbon content
B Amount of retained austenite
C The tempering time and temperature
question 8 Dislocations start to move through a metal when the applied stress exceeds the tensile strength
A True
B False
question 9 When a steel is cooled, austenite can transform to (Select all correct responses)
A Ferrite
B Pearlite
C Martensite
D Ferrite + Pearlite
question 10 Supersaturated solid solutions are important for
A Precipitation hardening
B Diffusion
C Forming cementite
D Pearlite lamellae spacing
question 11 Alloying elements are (Select all correct responses)
A Substitutions
B Solute atoms
C Vacancies
D Interstitials
question 12 In a single phase alloy, grain boundaries occur because of
A Different crystal structures between grains
B Different sizes of grains
C Misalignment of the crystal lattices between grains
D All of the above
question 13 Elongation is the change in tensile test sample gage length corresponding to the
A Yield strength
B Tensile strength
C Fracture stress
D Onset of necking
question 14
What must be done to a piece of metal to view its microstructure of a metal with an optical microscope?
A Polish it
B Encapsulate in resin
C Etch it
D All of the above
question 15 Dislocation motion in metals enables
A Metal strengthening
B Formation of cracks in metals
C Metal deformation without cracking
question 16 During cold working the number of dislocations present in a metal
A Increases
B Decreases
C Stays the same
Answers to above Questions
1 In a precipitation hardenable alloy (such as the 6061 aluminum alloy), which of the following is true? (Select all correct responses) Wrong answer
A
The maximum strength and hardness decreases as the aging temperature increasesPrecipitation hardening is discussed in Introduction to Metallurgy module 10.
B
The time to reach maximum hardness increases as the aging temperature increases.Precipitation hardening is discussed in Introduction to Metallurgy module 10.
CUsing too low of an aging temperature can lead to overagingPrecipitation hardening is discussed in Introduction to Metallurgy module 10
D
The size of the precipitates decreases as the aging temperature increases.Precipitation hardening is discussed in Introduction to Metallurgy module 10.
2 As grain size increases, the strength and hardness of a metal
Wrong answer
A
DecreasesGrains are explained in Introduction to Metallurgy module 3. The effects of grain size on metal strength and hardness is explained in module 9.
B
IncreasesGrains are explained in Introduction to Metallurgy module 3. The effects of grain size on metal strength and hardness is explained in module 9
C
Does not changeGrains are explained in Introduction to Metallurgy module 3. The effects of grain size on metal strength and hardness is explained in module 9
D
Decreases, then increasesGrains are explained in Introduction to Metallurgy module 3. The effects of grain size on metal strength and hardness is explained in module 9
E Increases, then decreases
3 Which of the following influences the mechanical properties of a metal? Wrong answer
A
MicrostructureThe influence of composition, microstructure, and dislocations on the mechanical properties of a metal are explained in Introduction to Metallurgy modules 2, 4, 6, 7, 9, 10, and 11.
B
CompositionThe influence of composition, microstructure, and dislocations on the mechanical properties of a metal are explained in Introduction to Metallurgy modules 2, 4, 6, 7, 9, 10, and 11.
C
The number of dislocations presentThe influence of composition, microstructure, and dislocations on the mechanical properties of a metal are explained in Introduction to Metallurgy modules 2, 4, 6, 7, 9, 10, and 11.
D
Presence of more than one phaseThe influence of composition, microstructure, and dislocations on the mechanical properties of a metal are explained in Introduction to Metallurgy modules 2, 4, 6, 7, 9, 10, and 11.
4 Which of the following impede dislocation motion? (Select all correct responses) Wrong answer
A
VoidsDislocations and their effects on mechanical properties are explained in Introduction to Metallurgy module 4. The influence of precipitates on dislocations is explained in module 10.
B
PrecipitatesDislocations and their effects on mechanical properties are explained in Introduction to Metallurgy module 4. The influence of precipitates on dislocations is explained in module 10.
C
Voids and precipitatesDislocations and their effects on mechanical properties are explained in Introduction to Metallurgy module 4. The influence of precipitates on dislocations is explained in module 10.
D
None of the aboveDislocations and their effects on mechanical properties are explained in Introduction to Metallurgy module 4. The influence of precipitates on dislocations is explained in module 10.
5 Which of the following is not a phase transformation? (Select all correct responses) Wrong answer
A
Austenite to pearlitePhases, phase transformations, and their effects on mechanical properties are explained in Introduction to Metallurgy modules 3, 10, and 11.
B
Precipitation hardeningPhases, phase transformations, and their effects on mechanical properties are explained in Introduction to Metallurgy modules 3, 10, and 11.
C
Austenite to martensitePhases, phase transformations, and their effects on mechanical properties are explained in Introduction to Metallurgy modules 3, 10, and 11.
D
None of the abovePhases, phase transformations, and their effects on mechanical properties are explained in Introduction to Metallurgy modules 3, 10, and 11.
6 The extent of diffusion can be increased by (Select all correct responses) Wrong answer
A
Increasing the temperatureDiffusion and its importance to mechanical properties is discussed in Introduction to Metallurgy modules 5, 10, and 11.
B
Adding more of an alloying elementDiffusion and its importance to mechanical properties is discussed in Introduction to Metallurgy modules 5, 10, and 11.
C
Increasing the time at an elevated temperatureDiffusion and its importance to mechanical properties is discussed in Introduction to Metallurgy modules 5, 10, and 11.
7 The hardness of martensitic steel depends on (Select all correct responses) Wrong answer
A
Carbon contentThe influence of carbon content, retained austenite, and tempering on the hardness of martensitic steel is discussed in Introduction to Metallurgy module 11.
B Amount of retained austeniteThe influence of carbon content, retained austenite, and tempering on the hardness of martensitic steel is discussed
in Introduction to Metallurgy module 11.
C
The tempering time and temperatureThe influence of carbon content, retained austenite, and tempering on the hardness of martensitic steel is discussed in Introduction to Metallurgy module 11.
8 Dislocations start to move through a metal when the applied stress exceeds the tensile strength Wrong answer
ATrueDislocation motion is explained in Introduction to Metallurgy module 4 and discussed further in modules 7, 8, 9, and 10.
BFalseDislocation motion is explained in Introduction to Metallurgy module 4 and discussed further in modules 7, 8, 9, and 10.
9 When a steel is cooled, austenite can transform to (Select all correct responses) Wrong answer
AFerriteThe austenite transformation in steel is discussed in Introduction to Metallurgy module 11.
BPearliteThe austenite transformation in steel is discussed in Introduction to Metallurgy module 11.
CMartensiteThe austenite transformation in steel is discussed in Introduction to Metallurgy module 11.
DFerrite + PearliteThe austenite transformation in steel is discussed in Introduction to Metallurgy module 11.
10 Supersaturated solid solutions are important for Wrong answer
A
Precipitation hardeningSupersaturated solid solutions and their importance to precipitation hardening is discussed in Introduction to Metallurgy module 11.
B
DiffusionSupersaturated solid solutions and their importance to precipitation hardening is discussed in Introduction to Metallurgy module 11.
C
Forming cementiteSupersaturated solid solutions and their importance to precipitation hardening is discussed in Introduction to Metallurgy module 11.
D
Pearlite lamellae spacingSupersaturated solid solutions and their importance to precipitation hardening is discussed in Introduction to Metallurgy module 11.
11 Alloying elements are (Select all correct responses) Wrong answer
A SubstitutionsSubstitutions and their importance to alloying is discussed in
Introduction to Metallurgy module 4.
B
Solute atomsThe concept of solute atoms and their effects on mechanical propoerties is discussed in Introduction to Metallurgy modules 4, 9, 10, and 11.
C
VacanciesSubstitutions, interstitials, and solute atoms and their importance to alloying is discussed in Introduction to Metallurgy module 4, 9, 10, and 11.
DInterstitialsInterstitials and their importance to alloying is discussed in Introduction to Metallurgy module 3.
12 In a single phase alloy, grain boundaries occur because of Wrong answer
A
Different crystal structures between grainsGrains, grain boundaries, and their influence on mechical properties are discussed Introduction to Metallurgy module 3 and 9.
B
Different sizes of grainsGrains, grain boundaries, and their influence on mechical properties are discussed Introduction to Metallurgy module 3 and 9.
C
Misalignment of the crystal lattices between grainsGrains, grain boundaries, and their influence on mechical properties are discussed Introduction to Metallurgy module 3 and 9.
D
All of the aboveGrains, grain boundaries, and their influence on mechical properties are discussed Introduction to Metallurgy module 3 and 9.
13 Elongation is the change in tensile test sample gage length corresponding to the Wrong answer
AYield strengthElongation and other properties measured by tensile testing is explained in Introduction to Metallurgy module 7.
BTensile strengthElongation and other properties measured by tensile testing is explained in Introduction to Metallurgy module 7.
CFracture stressElongation and other properties measured by tensile testing is explained in Introduction to Metallurgy module 7.
DOnset of neckingElongation and other properties measured by tensile testing is explained in Introduction to Metallurgy module 7.
14 What must be done to a piece of metal to view its microstructure of a metal with an optical microscope? Wrong answer
APolish itSample preparation to view a metal's microstructure is discussed in Introduction to Metallurgy module 6.
B Encapsulate in resinSample preparation to view a metal's microstructure is
discussed in Introduction to Metallurgy module 6.
CEtch itSample preparation to view a metal's microstructure is discussed in Introduction to Metallurgy module 6.
DAll of the aboveSample preparation to view a metal's microstructure is discussed in Introduction to Metallurgy module 6.
15 Dislocation motion in metals enables Correct answer
A
Metal strengtheningDislocations, dislocation motion, and the influence of dislocations on the mechanical properties of a metal are explained in Introduction to Metallurgy modules 4, 7, 8, 9, 10, and 11.
B
Formation of cracks in metalsDislocations, dislocation motion, and the influence of dislocations on the mechanical properties of a metal are explained in Introduction to Metallurgy modules 4, 7, 8, 9, 10, and 11.
C
Metal deformation without crackingDislocations, dislocation motion, and the influence of dislocations on the mechanical properties of a metal are explained in Introduction to Metallurgy modules 4, 7, 8, 9, 10, and 11.
16 During cold working the number of dislocations present in a metal Correct answer
A
IncreasesThe effects of cold working on the number of dislocations present in a metal is discussed in Introduction to Metallurgy modules 4, 7, and 9.
B
DecreasesThe effects of cold working on the number of dislocations present in a metal is discussed in Introduction to Metallurgy modules 4, 7, and 9.
C
Stays the sameThe effects of cold working on the number of dislocations present in a metal is discussed in Introduction to Metallurgy modules 4, 7, and 9.
