Question 1

Increasing strain rate tends to have which one of the following effects on flow stress during hot forming of metal:

Accepted Answer

A)  decreases flow stress
B)  has no effect
C)  increases flow stress

Question 2

Which of the following are bulk deformation processes (three correct answers) :

Accepted Answer

A)  bending
B)  deep drawing
C)  extrusion
D)  forging
E)  rollingF) shearing

Question 3

The coefficient of friction between the part and the tool in cold working tends to be

Accepted Answer

A)  higher
B)  lower
C)  no different relative to its value in hot working

Question 4

Hot working of metals refers to which one of the following temperature regions relative to the melting point of the given metal:

Accepted Answer

A)  room temperature
B)  0.2Tm
C)  0.4Tm
D)  0.6Tm where Tm = the melting temperature on an absolute temperature scale D

Question 5

The flow curve expresses the behavior of a metal in which of the following regions of the stress-strain curve:

Accepted Answer

A)  elastic region
B)  plastic region

Question 6

Which of the following is typical of the starting work geometry in sheet metal processes:

Accepted Answer

A)  high volume to area ratio
B)  low volume to area ratio

Question 7

Which of the following are desirable properties of the work material in metal forming (two best answers) :

Accepted Answer

A)  high ductility
B)  high tensile strength
C)  high yield strength
D)  low ductility
E)  low tensile strengthF) low yield strength

Question 8

Which of the following are advantages and characteristics of hot working relative to cold working (four correct answers) :

Accepted Answer

A)  fracture of workpart is less likely
B)  friction is reduced
C)  increased strength properties
D)  isotropic mechanical properties
E)  less overall energy is requiredF) lower deformation forces are requiredG) more significant shape changes are possibleH) strain-rate sensitivity is reduced A, D, F, G

Question 9

The average flow stress is the flow stress multiplied by which of the following factors:

Accepted Answer

A)  n
B)  (1+n) 
C)  1/n
D)  1/(1+n)  where n is the strain-hardening exponent D

Question 10

Stresses applied in most metal forming operations are which one of the following:

Accepted Answer

A)  compressive
B)  shear
C)  tensile

Exam 14: Fundamentals of Metal Forming

Increasing strain rate tends to have which one of the following effects on flow stress during hot forming of metal:

Correct Answer
verified

Which of the following are bulk deformation processes (three correct answers) :

Correct Answer
verified

The coefficient of friction between the part and the tool in cold working tends to be

Correct Answer
verified

Hot working of metals refers to which one of the following temperature regions relative to the melting point of the given metal:

Correct Answer
verified
D

The flow curve expresses the behavior of a metal in which of the following regions of the stress-strain curve:

Correct Answer
verified

Which of the following is typical of the starting work geometry in sheet metal processes:

Correct Answer
verified

Which of the following are desirable properties of the work material in metal forming (two best answers) :

Correct Answer
verified

Which of the following are advantages and characteristics of hot working relative to cold working (four correct answers) :

Correct Answer
verified
A, D, F, G

The average flow stress is the flow stress multiplied by which of the following factors:

Correct Answer
verified
D

Stresses applied in most metal forming operations are which one of the following:

Correct Answer
verified

Exam 14: Fundamentals of Metal Forming

Increasing strain rate tends to have which one of the following effects on flow stress during hot forming of metal:

Correct AnswerverifiedShow Answer

Which of the following are bulk deformation processes (three correct answers) :

Correct AnswerverifiedShow Answer

The coefficient of friction between the part and the tool in cold working tends to be

Correct AnswerverifiedShow Answer

Hot working of metals refers to which one of the following temperature regions relative to the melting point of the given metal:

Correct AnswerverifiedD

The flow curve expresses the behavior of a metal in which of the following regions of the stress-strain curve:

Correct AnswerverifiedShow Answer

Which of the following is typical of the starting work geometry in sheet metal processes:

Correct AnswerverifiedShow Answer

Which of the following are desirable properties of the work material in metal forming (two best answers) :

Correct AnswerverifiedShow Answer

Which of the following are advantages and characteristics of hot working relative to cold working (four correct answers) :

Correct AnswerverifiedA, D, F, G

The average flow stress is the flow stress multiplied by which of the following factors:

Correct AnswerverifiedD

Stresses applied in most metal forming operations are which one of the following:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified
D

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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A, D, F, G

Correct Answer
verified
D

Correct Answer
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