Engineering Questions with Answers - Multiple Choice Questions

# Materials Science MCQ’s – Various Mechanical Properties

1 - Question

Up till which point will a body regain its original shape?
a) Yield point
b) Elastic limit
c) Fracture limit
d) Ultimate tensile strength point
Explanation: Elastic limit is a point up till which the body can regain its original shape even after deformation and change in shape. After this point the body cannot regain its original shape.

2 - Question

Plasticity increases with temperature.
a) True
b) False
Explanation: Plasticity increase with temperature. Metals have high plasticity at high temperature. Mainly manufacturing processes like forming, drawing, extrusion etc. are done after considering plasticity.

3 - Question

Which of the following is not an evidence of plastic action on the material?
a) Yield
b) Plastic flow
c) Fatigue
d) Creep
Explanation: When a body is acted upon by plastic actions, one of the following can be seen out of yield, plastic flow and creep. Fatigue isn’t an evidence left after plastic action on a body.

4 - Question

Which of the following is the property because of which a material can be drawn into wires?
a) Ductility
b) Elasticity
c) Malleability
d) Strength
Explanation: Ductility is the physical property by which the material can be drawn in wires. None of the other options matched this definition.

5 - Question

What is the unit of impact strength?
a) N/m
b) MN/m
c) MN/m2
d) N/m2
Explanation: The SI Unit for impact strength is expressed as MN/m2. The unit in the numerator is taken in mega newton as the force acting is very high in case of impact strength.

6 - Question

Arrange the following in increasing order of hardness: talc, gypsum, topaz diamond.
a) Talc, gypsum, topaz, diamond
b) Gypsum, topaz, talc, diamond
c) Diamond, topaz, talc, gypsum
d) Topaz, gypsum, talc, diamond
Explanation: Talc, gypsum, topaz and diamond is the correct order in which it is arranged in increasing order of hardness.

7 - Question

How is brittleness related to impact strength?
a) Brittleness is directly proportional to impact strength
b) Brittleness is inversely proportional to impact strength
c) Brittleness is directly proportional to a square of impact strength
d) Brittleness is inversely proportional to a square of impact strength
Explanation: Brittleness is inversely proportional to the value of impact strength of the body that is more the impact strength less is the brittleness and vice versa.

8 - Question

Which of the following properties is impact strength indicative of?
a) Elasticity
b) Hardness
c) Stiffness
d) Toughness
Explanation: Impact strength is indicative of toughness of material and is given by how much energy the material can absorb while going through plastic deformation.

9 - Question

Which of the following is not a correct designation of impact strength?
a) KCU
b) KCV
c) KCT
d) KCW