Material Science MCQ Questions Answers Mechanical Engineering

21) Hardness of steel greatly improves with

a) Annealing

b) cyaniding

c) normalizing

d) Tempering

View Answer
Option – b)

22) Cast steel crankshaft surface is hardened by

a) Nitriding

b) Normalizing

c) Carburizing

d) Induction heating

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Option – c)

23) The essential constituent of a hardened steel is

a) Pearlite

b) Austenite

c) Martensite

d) Troostite

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Option – c)

24) The windows of aeroplane are made of

a) PVC

b) PTFE

c) PMMA

d) None of these

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Option – c)

25) Which hardness method can measure hardness of a grain ?

a) Knoop

b) Shore

c) Rockwell

d) Vickers

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Option – a)

26) Most often machine components fail by

a) Buckling

b) Creep

c) Fatigue

d) All of these

View Answer
Option – c)