Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 8

A weight W is suspended at the free end of a light member hinged to a vertical wall. If the angle of inclination of the member with the upper wall is ?, the force introduced in the member, is:


Options are :

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

Answer :W sec ?

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 9

A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if:


Options are :

  • Floor is rough and the wall is smooth
  • Floor is smooth and the wall is rough
  • Floor and wall both are smooth surfaces
  • Floor and wall both are rough surfaces

Answer :Floor and wall both are smooth surfaces

A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is:


Options are :

  • 19 48'
  • 20 48'
  • 18 48'
  • 21 48'
  • 17 48'

Answer :19 48'

Kinetic friction may be defined as:


Options are :

  • Friction force acting when the body is just about to move
  • Friction force acting when the body is in motion
  • Angle between normal reaction and resultant of normal reaction and limiting friction
  • Ratio of limiting friction and normal reaction

Answer :Friction force acting when the body is in motion

If a particle moves with a uniform angular velocity ? radians/sec along the circumference of a circle of radius r, the equation for the velocity of the particle, is:


A.

v = ?


B.

y = ? ?y - r


C.

v = ?


D.

v = ?


Options are :

  • C
  • D
  • A
  • B

Answer :D

The phenomenon of collision of two elastic bodies takes place because bodies:


Options are :

  • Tend to compress each other till they are compressed maximum possible
  • All the above
  • Attempt to regain its original shape due to their elasticities
  • Immediately after collision come momentarily to rest

Answer :All the above

Energy may be defined as:


Options are :

  • All the above
  • Power of doing work
  • Rate of doing work
  • Capacity of doing work

Answer :Capacity of doing work

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 1

One half of a vibration of a body, is called:


Options are :

  • Beat
  • Period time
  • Amplitude
  • Oscillation

Answer :Beat

A smooth cylinder lying on its convex surface remains:


Options are :

  • In neutral equilibrium
  • In stable equilibrium
  • Out of equilibrium
  • In unstable equilibrium
  • None of these

Answer :In unstable equilibrium

A retarding force on a body does not:


Options are :

  • Change the motion of the body
  • Retard the motion of the body
  • Introduce the motion of the body
  • None of these

Answer :Retard the motion of the body

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 2

If ? and u are angle of projection and initial velocity of a projectile respectively, the total time of flight, is given by:


A.


B.


C.


D.


Options are :

  • D
  • A
  • C
  • B

Answer :D

A ball of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/sec hits an identical stationary ball B on the table

If the impact is perfectly plastic, the velocity of the ball B just after impact would be:


Options are :

  • None of these
  • 10 m/sec
  • 5 m/sec
  • Zero

Answer :Zero

Two loads of 50 kg and 75 kg are hung at the ends of a rope passing over a smooth pulley shown in below figure. The tension in the string is:


Options are :

  • 25 kg
  • 75 kg
  • 60 kg
  • 50 kg

Answer :60 kg

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 3

The force which produces an acceleration of 1 m/sec^(2) in a mass of one kg, is called:


Options are :

  • Joule
  • Netwon
  • Erg
  • Dyne

Answer :Netwon

From the circular plate of a diameter 6 cm is cut out a circular plate whose diameter is equal to radius of the plate. The c.g. of the remainder shifts from the original position through:


Options are :

  • 0.50 cm
  • 0.25 cm
  • 0.75 cm
  • 1.00 cm

Answer :0.50 cm

The reaction at the support B of the beam shown in below figure is:


Options are :

  • 9.6 t
  • 0.5 t
  • 8.5 t
  • 1.6 t

Answer :8.5 t

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 4

If ? is the angular acceleration of a compound pendulum whose angular displace ment is ?, the frequency of the motion is:


A.

2???/?


B.


C.

4???/?


D.

2??? - ?


Options are :

  • C
  • B
  • D
  • A

Answer :B

If the velocity of projection is 4 m/sec and the angle of projection is ?, the maximum height of the projectile from a horizontal plane, is:


A.


B.


C.


D.


Options are :

  • B
  • C
  • A
  • D

Answer :B

A body of weight w placed on an inclined plane is acted upon by a force P parallel to the plane which causes the body just to move up the plane. If the angle of inclination of the plane is ? and angle of friction is ?, the minimum value of P, is:


A.


B.


C.


D.


Options are :

  • D
  • B
  • C
  • A

Answer :B

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 5

The intrinsic equation of catenary is:


Options are :

  • y = c cosh x/c
  • S = c tan ?
  • y = c cosh ?
  • y = c sinh ?

Answer :S = c tan ?

The acceleration of a particle moving along the circumference of a circle with a uniform speed, is directed:


Options are :

  • Tangentially at that point
  • Away from the centre
  • Towards the centre
  • Radially

Answer :Tangentially at that point

The units of inertia of mass, are:


Options are :

  • m^(4)
  • kg/m
  • kg-m^(2)
  • m^(3)
  • kg/m^(2)

Answer :kg-m^(2)

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 6

In a simple screw jack, the pitch of the screw is 9 mm and length of the handle operating the screw is 45 cm. The velocity ratio of the system is:


Options are :

  • 5
  • 25
  • 314
  • 1.5

Answer :314

From a circular plate of a diameter 6 cm is cut out a circle whose diameter is equal to the radius of the plate. The C.G. of the remainder from the centre of circular plate is at a distance of:


Options are :

  • 0.5 cm
  • 2.0 cm
  • 1.5 cm
  • 1.0

Answer :0.5 cm

A glass ball is shot to hit a wall from a point on a smooth floor. If the ball returns back to the point of projection in twice the time taken in reaching the wall, the coefficient of restitution between the glass ball and the wall is:


Options are :

  • 0.50
  • 0.55
  • 0.40
  • 0.25
  • 0.33

Answer :0.50

A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is:


Options are :

  • 15
  • 26
  • 20
  • 18

Answer :20

In case of S.H.M. the period of oscillation(T), is given by:


A.


B.


C.


D.


Options are :

  • D
  • A
  • B
  • C

Answer :B

If the angle of projection is double the angle of inclination (?) of the plane on which particle is projected, the ratio of times of fligh up the inclined plane and down the inclined plane, will be:


A.


B.


C.


D.

2 cos ?


Options are :

  • A
  • B
  • C
  • D

Answer :A

A weight of 100 kg is supported by a string whose ends are attached to pegs A and B at the same level shown in below figure. The tension in the string is:


Options are :

  • 50 kg
  • 100 kg
  • 120 kg
  • 75 kg

Answer :100 kg

A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight:


Options are :

  • Vertical component of velocity remains constant
  • Horizontal component of velocity remains constant
  • Speed of the ball remains constant
  • Kinetic energy of the ball remains constant

Answer :Horizontal component of velocity remains constant

Comment / Suggestion Section
Point our Mistakes and Post Your Suggestions