Order Mechanical Properties of Matter

Order Mechanical Properties of Matter
Order 5867876
Order Mechanical Properties of Matter
1. The property of matter by virtue of
which a body tends to regain its original
shape and size after the removal of
deforming force is called
(a) plasticity (b) elasticity
(c) stress (d) capillarity
2. The body is called perfectly plastic body
(a) if the body completely gain its
original shape after removal of
deforming force.
(b) if the body remains in deformed shape
even after removal of the deforming
force.
(c) if weight of the body is equal to force
of buoyancy
(d) None of the above
3. Which of the following is not a
characteristics of a solid? [SSC 2017]
(a) High compressibility
(b) High density
(c) Regular shape
(d) High rigidity
4. The spring constant of a spring
depends on its [CDS 2016]
(a) length only
(b) material only
(c) length and its diameter
(d) thickness, its diameter and its material
5. Steel is more elastic than rubber
because it [SSC CGL 2013]
(a) requires larger deforming force.
(b) is never deformed.
(c) is deformed very easily.
(d) is harder than rubber.
6. Which one of the following substances
possesses the highest elasticity?
(a) Rubber (b) Glass
(c) Steel (d) Copper
Order Mechanical Properties of Matter
7. Assertion (A) The solids are more
elastic and gases are least elastic.
Reason (R) It is so because for the
given stress applied the gases are
more compressible than that of solids.
Codes
(a) Both A and R are true and R is the
correct explanation of A
(b) Both A and R are true, but R is not the
correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
8. If by applying a force, the shape of a
body is changed, then the
corresponding stress is
(a) tensile stress
(b) bulk stress
(c) shearing stress
(d) compressive stress
9. The breaking stress of wire depends on
(a) material of the wire.
(b) length of the wire.
(c) radius of the wire.
(d) shape of the cross-section of the wire.
10. Longitudinal strain is defined when
(a) under a large force change in length
is smaller.
(b) under a weak force change in length
be smaller.
(c) under a large force change in length
is larger.
(d) None of the above
11. The unit of strain is
(a) Newton (b) Kilogram
(c) Kelvin (d) None of these
12. The Hooke’s law is valid for [CDS 2019]
(a) only proportional region of the
stress-strain curve.
(b) entire stress-strain curve.
(c) entire elastic region of the stressstrain curve.
(d) elastic as well as plastic region of the
stress-strain curve.
13. The spring balance works on the
principle of …… . [SSC CGL 2016]
(a) Boyle’s Law
(b) Hooke’s Law
(c) Bernoulli’s Principle
(d) Pascal’s Law
14. The Young’s modulus for perfectly rigid
body is
(a) zero
(b) one
(c) infinite
(d) None of the above
15. In an experiment to determine the
Young’s modulus of a material of a
wire, and the suspended mass are
doubled. Then the Young’s modulus of
the wire
(a) becomes double.
(b) becomes four times.
(c) remain unchanged.
(d) becomes half.
Order Mechanical Properties of Matter
16. Bulk modulus of elasticity is defined as
(a) the ratio of longitudinal stress to the
longitudinal strain within the elastic
limit.
(b) the ratio of normal stress to the
volumetric strain within the elastic limit.
(c) the ratio of shearing stress to the
shearing strain within the elastic limit.
(d) None of the above
17. The modulus of rigidity of a liquid is
(a) zero
(b) infinite
(c) one
(d) None of the above
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