Explore topic-wise MCQs in Mechanical Metallurgy.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.

1.

Which is not a characteristic feature of low cycle fatigue?

A. High-stress amplitude
B. High strain amplitude
C. Thermal fluctuation
D. Low-stress cycle
Answer» E.
Discussion
2.

The c (fatigue ductility exponent) is a ______________

A. positive integer
B. negative integer
C. negative fraction
D. positive fraction
Answer» D. positive fraction
Discussion
3.

Smaller the value of c (fatigue ductility exponent) ____________ will be the life of component.

A. longer
B. shorter
C. no relation
D. depends on the material
Answer» B. shorter
Discussion
4.

The fatigue ductility coefficient is approximately equal to _______________ for most of the metals.

A. strain hardening exponent
B. true fracture strain
C. true fracture stress
D. coefficient of thermal expansion
Answer» C. true fracture stress
Discussion
5.

The Coffin-Manson relation is described as ________________where Δεp = the plastic strain amplitudeε’f = fatigue ductility coefficient2N = number of strain reversal to failurec = fatigue ductility exponent

A. Δεp/2=ε’f (2N)c
B. Δεp=ε’f (2N)c
C. Δεp/2=ε’f (N)c
D. Δεp=ε’f (N)c
Answer» B. Δεp=ε’f (2N)c
Discussion
6.

The Coffin-Manson relation is used to describe the ____________________

A. high cycle fatigue
B. low cycle fatigue
C. stress-strain relation
D. stress-strain cycle relation
Answer» C. stress-strain relation
Discussion
7.

The following figure represents the hysteresis loop for cycle softening of the material.

A. True
B. False
Answer» B. False
Discussion
8.

Which of the following is the strain-controlled cycle fatigue in which the strain amplitude is kept constant during fatigue process?

A. Car wheel
B. Crankshaft
C. Thermal expansion and contraction of component
D. Dial meter
Answer» D. Dial meter
Discussion