Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 5

The centre of gravity of a quadrant of a circle lies along its central radius at a distance of:


Options are :

  • 0.3 R
  • 0.2 R
  • 0.6 R
  • 0.5 R
  • 0.4 R

Answer :0.6 R

When a body moves round a fixed axis, it has:


Options are :

  • A rotary motion and translatory motion
  • A translatory
  • A circular motion
  • A rotary motion

Answer :A circular motion

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 6

The Centre of gravity of a 10 x 15 x 5 cm T section from its bottom, is:


Options are :

  • 7.85 cm
  • 5.0 cm
  • None of above
  • 8.75 cm
  • 7.5 cm

Answer :8.75 cm

A particle moving with a simple harmonic motion, attains its maximum velocity when it passes:


Options are :

  • Through a point at half amplitude
  • The extreme point of the oscillation
  • Through the mean position
  • None of these

Answer :Through the mean position

The reaction at the central support B of the beam ABC hinged at D shown in below figure is:


Options are :

  • 5.8 t
  • 0.2 t
  • 2 t
  • 3.5 t

Answer :5.8 t

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 7

The moment of inertia of a triangular section (base b, height h) about centroidal axis parallel to the base, is:


A.


B.


C.


D.


E.


Options are :

  • B
  • D
  • A
  • C
  • E

Answer :C

The velocity ratio of an inclined plane of inclination ? with horizontal for lifting a load is:


Options are :

  • tan ?
  • sec ?
  • cosec ?
  • sin ?
  • cos ?

Answer :cosec ?

Pick up the correct statement from the following. The kinetic energy of a body:


Options are :

  • Remains constant
  • None of these
  • Before impact is less than that after impact
  • Before impact is more than that after impact
  • Before impact is equal to that after impact

Answer :Before impact is more than that after impact

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 8

If a body is acted upon by a number of coplaner non-concurrent forces, it may:


Options are :

  • Move in any one direction
  • All the above
  • Rotate about itself without moving
  • Move in any one direction rotating about itself
  • Be completely at rest

Answer :All the above

The motion of a particle moving with S.H.M. from an extremity to the other, constitutes:


Options are :

  • Half an oscillation
  • One full oscillation
  • None of these
  • Two oscillations

Answer :Half an oscillation

The velocity of a moving body, is:


Options are :

  • A vector quantity
  • A constant quantity
  • None of these
  • A scalar quantity

Answer :A vector quantity

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 9

A particle is dropped from the top of a tower 60 m high and another is projected upwards from the foot of the tower to meet the first particle at a height of 15.9 m. The velocity of projection of the second particle is:


Options are :

  • 18 m/sec
  • 22 m/sec
  • 20 m/sec
  • 16 m/sec

Answer :20 m/sec

If l is the span of a light suspension bridge whose each cable carries total weight (w) and the central dip is y, the horizontal pull at each support, is:


A.


B.


C.


D.

wl


Options are :

  • D
  • B
  • C
  • A

Answer :B

Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for:


Options are :

  • Quarter oscillation
  • None of these
  • Half oscillation
  • Complete oscillation

Answer :Complete oscillation

The rate of change of displacement of a body with respect to its surrounding, is known:


Options are :

  • Speed
  • Velocity
  • None of these
  • Acceleration

Answer :Velocity

The frequency of oscillation on moon as compared to that on earth, will be:


Options are :

  • 3 times more
  • 3 times less
  • 2.44 times more
  • 2.44 times less

Answer :2.44 times less

In the structure shown in below figure, the member which carries zero force, is:


Options are :

  • AB
  • All the above
  • BE
  • BD
  • BC

Answer :All the above

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 1

Pick up the correct statement from the following:


Options are :

  • If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities
  • If a smooth sphere impinges on another sphere, which is at rest, the latter will move along the line of centres
  • If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles
  • All the above
  • If a sphere impinges directly on an equal sphere which is at rest, then a fraction (1 - e2) the original kinetic energy is lost by the impact

Answer :All the above

For a self-locking machine, the efficiency should be:


Options are :

  • More than 50%
  • Less than 60%
  • None of these
  • 50%

Answer :Less than 60%

The point about which combined motion of rotation and translation of a rigid body takes place, is known as:


Options are :

  • Instantaneous axis
  • Virtual centre
  • Instantaneous centre
  • Point of rotation
  • All the above

Answer :Instantaneous centre

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 2

The practical units of work, is:


Options are :

  • Erg
  • Newton
  • Joule
  • Dyne

Answer :Joule

The direction of projection should bisect the angle between the inclined plane and the vertical for a range of a projectile on inclined plane:


Options are :

  • To be zero
  • None of the these
  • To be maximum
  • To be minimum

Answer :To be maximum

If two equal forces of magnitude P act at an angle ?, their resultant, will be:


Options are :

  • P tan ?/2
  • P sin ?/2
  • 2P cos ?/2
  • P cos ?/2
  • 2P sin ?/2

Answer :2P cos ?/2

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 3

M.I. of solid sphere, is:


Options are :

  • 2/5 Mr^(2)
  • 1/2 Mr^(2)
  • 2/3 Mr^(2)
  • ?r^(4)/2
  • Mr^(2)

Answer :Mr^(2)

When a body slides down an inclined surface, the acceleration (f) of the body, is given by:


Options are :

  • f = g cos ?
  • f = g sin ?
  • f = g tan ?
  • f = g

Answer :f = g sin ?

The reaction at the support D of the continuous beam ABCD, hinged at two points shown in below figure is:


Options are :

  • 0.5 t ?
  • 8.5 t ?
  • 1.6 t ?
  • 0.5 t ?
  • 1.6 t ?

Answer :1.6 t ?

A ball of mass 1 kg moving with a velocity of 2 m/sec collides a stationary ball of mass 2 kg and comes to rest after impact. The velocity of the second ball after impact will be:


Options are :

  • Zero
  • 0.5 m/sec
  • 2.0 m/sec
  • 1.0 m/sec

Answer :1.0 m/sec

A point subjected to a number of forces will be in equilibrium, if:


Options are :

  • Two resolved parts in any two directions at right angles are equal
  • None of these
  • Algebraic sum of the moments of the forces about the point is zero
  • Sum of resolved parts in any two directions at right angles, are both zero
  • Algebraic sum of the forces is zero

Answer :Sum of resolved parts in any two directions at right angles, are both zero

A rigid body suspended Vertically at a point and oscillating with a small amplitude under the action of the force of gravity, is called:


Options are :

  • Second's pendulum
  • Simple pendulum
  • None of these
  • Compour pendulum

Answer :Compour pendulum

The unit of impulse, is:


Options are :

  • kg.m/sec^(3)
  • kg.m/sec
  • kg.m^(2)/sec
  • kg.m/sec^(2)

Answer :kg.m/sec

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