Material Science MCQ – Objective Questions & Answers

1. If a particular Fe – C alloy contains less than 0.83% carbon, it is called as
A) High speed steel
B) Hypoeutectoid steel
C) Hypereutectoid steel
D) Cast iron
Ans: B

2. The effective number of lattice points in the unit cell of simple cubic, body centred cubic and face centred cubic space lattices respectively are
A) 1, 2, 2
B) 1, 2, 4
C) 2, 3, 4
D) 2, 4,4
Ans: B

3. The material property which depends only on the basic crystal structure is
A) Fatigue strength
B) Work hardening
C) Fracture strength
D) Elastic constant
Ans: C

4. The operation in which oil is permitted into the pores of a powder metallurgy product is known as
A) Mixing
B) Sintering
C) Impregnation
D) Infiltration
Ans: C

5. The crystal structure of austenite is
A) Body centred cubic
B) Face centred cubic
C) Hexagonal closed packed
D) Body centred tetragonal
Ans: B

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