Question 1

The flow curve describes the property of metals known as which one of the following:

Accepted Answer

A)  ductility
B)  engineering strain
C)  fracture stress
D)  strain hardening
E)  tensile strength

Question 2

Which one of the following materials has the highest modulus of elasticity:

Accepted Answer

A)  aluminum
B)  diamond
C)  steel
D)  titanium
E)  tungsten

Question 3

The plastic region of the stress-strain curve for a metal is characterized by a proportional relationship between stress and strain:

Accepted Answer

A) True 
 B)False

Question 4

A Newtonian fluid is a fluid best defined by which one of the following:

Accepted Answer

A)  its viscosity decreases as shear rate increases
B)  its viscosity decreases as temperature increases
C)  its viscosity increases as shear rate increases
D)  its viscosity increases as temperature increases
E)  its viscosity remains constant as shear rate changesF) its viscosity remains constant as temperature changes E

Question 5

The transverse rupture strength is a property usually associated with which one of the following material types:

Accepted Answer

A)  ceramics
B)  metals
C)  plastics
D)  rubber

Question 6

The formation of new strain-free grains in a metal that has been heated to an elevated temperature is called which one of the following:

Accepted Answer

A)  hot hardness
B)  recrystallization
C)  strain hardening
D)  strain softening

Question 7

Which of the following are the three basic types of static stresses to which a material can be subjected (three correct answers) :

Accepted Answer

A)  compression
B)  hardness
C)  reduction in area
D)  shear
E)  tensileF) true stressG) Yield A, D, E

Question 8

Which one of the following types of stress strain relationship best describes the behavior of brittle materials such as ceramics and thermosetting plastics:

Accepted Answer

A)  elastic and perfectly plastic
B)  elastic and strain hardening
C)  perfectly elastic
D)  none of the above C

Question 9

The shear strength of a metal is commonly determined in which one of the following tests:

Accepted Answer

A)  bending test
B)  compression test
C)  flexure test
D)  tensile test
E)  torsion test

Question 10

Most hardness tests involve pressing a hard object into the surface of a test specimen and measuring the resulting indentation or its effect:

Accepted Answer

A) True 
 B)False

Question 11

Hardness is best defined as which one of the following:

Accepted Answer

A)  energy absorbed by a material when an object strikes its surface
B)  resistance to bending
C)  resistance to permanent indentation
D)  resistance to scratching

Question 12

Which one of the following types of stress strain relationship best describes the behavior of metals at temperatures above their respective recrystallization points:

Accepted Answer

A)  elastic and perfectly plastic
B)  elastic and strain hardening
C)  perfectly elastic
D)  none of the above

Question 13

The shear strength of a metal is usually

Accepted Answer

A)  greater than
B)  less than its tensile strength

Question 14

If engineering stress and true stress were measured simultaneously during a tensile test, which would have the higher value:

Accepted Answer

A)  engineering stress
B)  true stress

Question 15

If engineering strain and true strain were measured simultaneously during a tensile test, which would have the higher value:

Accepted Answer

A)  engineering strain
B)  true strain

Question 16

Which one of the following is the correct definition of ultimate tensile strength, as derived from the results of a tensile test on a metal specimen:

Accepted Answer

A)  the stress encountered when the stress-strain curve transforms from elastic to plastic behavior
B)  the maximum load divided by the final area of the specimen
C)  the maximum load divided by the original area of the specimen
D)  the stress observed when the specimen finally fails

Question 17

Viscoelasticity can be defined as the property of a material that determines the strain it experiences when subjected to combinations of stress and temperature over time:

Accepted Answer

A) True 
 B)False

Question 18

Which one of the following materials has the highest hardness:

Accepted Answer

A)  alumina ceramic
B)  gray cast iron
C)  hardened tool steel
D)  high carbon steel
E)  polystyrene

Question 19

The modulus of elasticity is also known as which one of the following:

Accepted Answer

A)  elastic limit
B)  strain hardening exponent
C)  strength coefficient
D)  Young's modulus

Question 20

Which one of the following types of stress strain relationship best describes the behavior of most metals at room temperature:

Accepted Answer

A)  elastic and perfectly plastic
B)  elastic and strain hardening
C)  perfectly elastic
D)  none of the above

Exam 3: Mechanical Properties of Materials

The flow curve describes the property of metals known as which one of the following:

Correct AnswerverifiedShow Answer

Which one of the following materials has the highest modulus of elasticity:

Correct AnswerverifiedShow Answer

The plastic region of the stress-strain curve for a metal is characterized by a proportional relationship between stress and strain:

Correct AnswerverifiedShow Answer

A Newtonian fluid is a fluid best defined by which one of the following:

Correct AnswerverifiedE

The transverse rupture strength is a property usually associated with which one of the following material types:

Correct AnswerverifiedShow Answer

The formation of new strain-free grains in a metal that has been heated to an elevated temperature is called which one of the following:

Correct AnswerverifiedShow Answer

Which of the following are the three basic types of static stresses to which a material can be subjected (three correct answers) :

Correct AnswerverifiedA, D, E

Which one of the following types of stress strain relationship best describes the behavior of brittle materials such as ceramics and thermosetting plastics:

Correct AnswerverifiedC

The shear strength of a metal is commonly determined in which one of the following tests:

Correct AnswerverifiedShow Answer

Most hardness tests involve pressing a hard object into the surface of a test specimen and measuring the resulting indentation or its effect:

Correct AnswerverifiedShow Answer

Hardness is best defined as which one of the following:

Correct AnswerverifiedShow Answer

Which one of the following types of stress strain relationship best describes the behavior of metals at temperatures above their respective recrystallization points:

Correct AnswerverifiedShow Answer

The shear strength of a metal is usually

Correct AnswerverifiedShow Answer

If engineering stress and true stress were measured simultaneously during a tensile test, which would have the higher value:

Correct AnswerverifiedShow Answer

If engineering strain and true strain were measured simultaneously during a tensile test, which would have the higher value:

Correct AnswerverifiedShow Answer

Which one of the following is the correct definition of ultimate tensile strength, as derived from the results of a tensile test on a metal specimen:

Correct AnswerverifiedShow Answer

Viscoelasticity can be defined as the property of a material that determines the strain it experiences when subjected to combinations of stress and temperature over time:

Correct AnswerverifiedShow Answer

Which one of the following materials has the highest hardness:

Correct AnswerverifiedShow Answer

The modulus of elasticity is also known as which one of the following:

Correct AnswerverifiedShow Answer

Which one of the following types of stress strain relationship best describes the behavior of most metals at room temperature:

Correct AnswerverifiedShow Answer

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E

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A, D, E

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C

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