Practice Test: Question Set - 24
1. Angular acceleration of a particle may be expressed as
- (A) Radians/sec2
- (B) Degrees/sec2
- (C) Revolutions/sec
- (D) All
the above
2. The tension in a cable supporting a lift
- (A) Is more when
the lift is moving downwards
- (B) Is less when
the lift is moving upwards
- (C) Remains
constant whether its moves downwards or upwards
- (D) Is less when
the lift is moving downwards
3. The vertical reaction at the support ‘A’ of the structure shown in below figure, is
- (A) 1 t
- (B) 2 t
- (C) 3 t
- (D) 3.5 t
4. The shape of a suspended cable under its own weight, is
- (A) Parabolic
- (B) Circular
- (C) Catenary
- (D) Elliptical
5. If the kinetic energy and potential energy of a simple harmonic oscillator of amplitude A are both equal to half the total energy, then the displacement is equal to
- (A) A
- (B) A/2
- (C) A/√2
- (D) A√2
6. Pick up the correct statement from the following:
- (A) If two equal
and perfectly elastic smooth spheres impinge directly, they interchange their
velocities
- (B) If a sphere
impinges directly on an equal sphere which is at rest, then a fraction ½(1
- e2) the original kinetic energy is lost by the impact
- (C) If two equal
spheres which are perfectly elastic impinge at right angles, their direction
after impact will still be at right angles
- (D) All the
above
7. The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is
- (A) Weight
- (B) Mass
- (C) Inertia
- (D) Momentum
8. A particle is executing simple harmonic motion in a line 1.0 m long. If the time of one complete vibration is 1 sec, then the maximum velocity of the particle is
- (A) 1.00 m/sec
- (B) 1.57 m/sec
- (C) 3.14 m/sec
- (D) 6.28 m/sec
9. Pick up the correct statement from the following. The kinetic energy of a body
- (A) Before
impact is equal to that after impact
- (B) Before
impact is less than that after impact
- (C) Before
impact is more than that after impact
- (D) Remain
constant
10. The reaction at the support ‘A’ of the beam shown in below figure is
- (A) 2 t
- (B) 5.8 t
- (C) 0.2 t
- (D) 3.5 t
11. Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and
- (A) Concurrent
- (B) Parallel
- (C) Concurrent
parallel
- (D) None of
these
12. Coefficient of friction depends on
- (A) Nature of surfaces only
- (B) Area of contact only
- (C) Both (A) and (B)
- (D) None of the above
13. The intrinsic equation of catenary is
- (A) S = c tan ψ
- (B) y = c cosh x/c
- (C) y = c cosh ψ
- (D) y = c sinh ψ
14. If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is
- (A) 8°
- (B) 9°
- (C) 10°
- (D) 11°
15. What is the answer to this question?
- (A) 10.8 t
- (B) 10.6 t
- (C) 10.4 t
- (D) 10.2 t
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