Manufacturing Engineering Multiple Choice Questions on “Mechanical Properties”.
1. Resistance of a material against any external force is termed as _______________
a) Stiffness
b) Malleability
c) Strength
d) Hardness
Answer: c
Clarification: Strength is that mechanical property of a material by virtue of which it resists change in its dimension shape and any failure by application of any external force.
2. The property of a material to resist any elastic deformation is termed as ____________
a) Stiffness
b) Hardness
c) Malleability
d) Strength
Answer: a
Clarification: The ability of a material or shape to resist elastic deflection is termed as stiffness of that material.
3. Resistance developed by surface of any material is known as ____________
a) Strength
b) Hardness
c) Stiffness
d) Creep
Answer: b
Clarification: Hardness is a surface property. Resistance developed by surface of any material is known as hardness.
4. Permanent deformation of material with respect to time due to constant load and variable temperature is termed as ____________
a) Elasticity
b) Isotropy
c) Hardness
d) Creep
Answer: d
Clarification: Creep is time and temperature dependent phenomenon. With the passage of time and other environmental condition, material may lead to fracture point.
5. Material having same identical values a property in all directions can be termed as ____________
a) Creep
b) Anisotropy
c) Isotropy
d) Orthotropic
Answer: c
Clarification: Isotropic materials have the same property in all directions. Crystalline substance is isotropic in nature.
6. Property by virtue of which material can absorb strain energy without plastic deformation is called ____________
a) Creep
b) Anisotropy
c) Resilience
d) Fatigue
Answer: c
Clarification: Resilience is the strain energy absorbed of a material without undergoing a plastic deformation.
7. Which of the following hardness test uses steel ball as indenter?
a) Brinell hardness test
b) Rockwell C hardness test
c) Vickers hardness test
d) Rockwell B hardness test
Answer: a
Clarification: Steel ball is used as indentor in Brinell hardness test.
8. In which of the following test specimen is in the form of the simply supported beam?
a) Izod test
b) Rockwell hardness test
c) Charpy test
d) Brinell test
Answer: c
Clarification: In the Charpy test a supported beam specimen is used.
9. In which of the following test specimen is in the form of cantilever beam?
a) Izod test
b) Rockwell hardness test
c) Charpy test
d) Brinell test
Answer: a
Clarification: Izod test is like Charpy test, but the Izod geometry consists of a cantilever beam with the notch located on the same side as the impact point.
10. The total number of scales used in Rockwell hardness test is?
a) 12
b) 14
c) 15
d) 16
Answer: c
Clarification: There are 15 scales used in Rockwell hardness test, which are being differentiated based on indenter used and the material sampled.
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