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
View Answer
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
View Answer
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
View Answer
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
View Answer
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
View Answer
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
View Answer
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
View Answer
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
View Answer
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
View Answer
Explanation: The first two letter signify that it is impact strength and KC are used for that. The third letter signifies the type of notch used, for example, U notch signify that the notch is U shaped.
10 - Question
KCU is used more than the other KCT and KCV.
a) True
b) False
View Answer
Explanation: This statement is true as KCU is more broadly used for impact strength while KCT and KCV are used in special cases.