Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 6

When a body falls freely under gravitational force, it possesses:


Options are :

  • No effect on its weight
  • Maximum weight
  • Minimum weight
  • No weight

Answer :No weight

A geo-stationary satellite is one which orbits the earth with a velocity of rotation of:


Options are :

  • Pole
  • Moon
  • Earth
  • Sun

Answer :Earth

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 7

The motion of a bicycle wheel is:


Options are :

  • Rotary and translatory
  • Curvilinear
  • Translatory
  • Rotary

Answer :Rotary and translatory

The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of:


A.


B.


C.


D.


E.

R/2


Options are :

  • C
  • E
  • A
  • D
  • B

Answer :B

Moment of interia of a squares of side fa about an axis through its centre of gravity, is:


Options are :

  • b^(4)/8
  • b^(3)/4
  • b^(4)/3
  • b^(4)/12
  • b^(4)/36

Answer :b^(4)/12

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 8

The moment of intertia of a circular lamina of diameter d, about an axis perpendicular to the plane of the lamina and passing through its centre, is:


A.


B.


C.


D.


E.


Options are :

  • D
  • A
  • C
  • E
  • B

Answer :D

The displacement of a particle which moves along a straight line is given by S = 4t3 + 3t2 - 10 where S is in meters and t is in seconds. The time taken by the particle to acquire a velocity of 18 m/sec from rest, is:


A.

sec


B.

1 sec


C.

1.5 sec


D.

None of these


Options are :

  • A
  • C
  • D
  • B

Answer :B

If two forces P and Q (P > Q) act on the same straight line but in opposite direction, their resultant, is:


Options are :

  • P + Q
  • P/Q
  • Q - P
  • P - Q
  • Q/P

Answer :P - Q

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 9

The characteristic of a couple, is:


Options are :

  • Algebraic sum of moments of forces, constituting a couple, about any poin, is same
  • A couple can be never the balanced by a single force
  • A couple can be balanced only by a couple but of opposite sense
  • All the above
  • Algebraic sum of forces, constituting a couple is zero

Answer :All the above

If ? and u are the angle of projection and initial velocity of a projectile respectively, the horizontal range of the projectile, is:


A.


B.


C.


D.


Options are :

  • B
  • A
  • C
  • D

Answer :A

A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be:


Options are :

  • 60 kg
  • 72 kg
  • 48 kg
  • None of these

Answer :48 kg

Effect of a force on a body depends upon its:


Options are :

  • Direction
  • Position
  • Magnitude
  • All the above

Answer :All the above

When a body of mass M1 is hanging freely and an other of mass M2 lying on a smooth inclined plane(?) are connected by a light indextensible string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by:


A.


B.


C.


D.


Options are :

  • C
  • A
  • D
  • B

Answer :B

A pilot flies a small plane in a vertical loop of radius r. At the top of its trajectory he experiences weightlessness. If the acceleration due to gravity is g, the speed of the plane at the top of its trajectory would be:


Options are :

  • ?gr
  • Infinite
  • ?2gr
  • Zero

Answer :?gr

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 1

A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45 and its direction after impact is equally inclined to the line of impact

If the coefficient of restitution is 0.5, the velocity of the ball after impact will be:


Options are :

  • 0.5 m/sec
  • 1.5 m/sec
  • 4.5 m/sec
  • 3.5 m/sec
  • 2.5 m/sec

Answer :2.5 m/sec

For a body moving with simple harmonic motion, the number of cycles per second, is known as its:


Options are :

  • Periodic time
  • Frequency
  • Amplitude
  • Oscillation
  • Beat

Answer :Frequency

A 50 kg boy climbs up a 8 m rope in gymnasiam in 10 sec. The average power developed by the boy is approximately:


Options are :

  • 4000 watts
  • 400 watts
  • 500 watts
  • None of these

Answer :400 watts

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 2

A Seconds pendulum executes:


Options are :

  • 3 beats per second
  • 2.5 beats per second
  • 0.5 beat per second
  • 2.0 beats per second
  • 1.0 beat per second

Answer :2.0 beats per second

The ratio of the reactions RA and RB of a simply supported beam shown in below figure is:


Options are :

  • 1.50
  • 0.40
  • 1.00
  • 0.67
  • 0.50

Answer :1.00

The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is:


Options are :

  • Momentum
  • Interia
  • Weight
  • Mass

Answer :Interia

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 3

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

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


Options are :

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

Answer :10 m/sec

Time required to stop a car moving with a velocity 20 m/sec within a distance of 40 m, is:


Options are :

  • 3 sec
  • 4 sec
  • 5 sec
  • 6 sec
  • 2 sec

Answer :4 sec

For maximum range of a projectile, the angle of projection should be:


Options are :

  • 45
  • None of these
  • 60
  • 30

Answer :45

Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 4

For lifting a load of 50 kg through a distance of 2.5 cm, an effort of 12.5 kg is moved through a distance of 40 cm. The efficiency of the lifting machine, is:


Options are :

  • 70%
  • 25%
  • 65%
  • 60%

Answer :25%

Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation:


Options are :

  • bears a constant ratio to their velocity of approach
  • is equal to the sum of their velocities of approach
  • is inversely proportional to their velocity of approach
  • is directly proportional to their velocity of approach

Answer :bears a constant ratio to their velocity of approach

Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature:


Options are :

  • Dip of the cable increases
  • None of the these
  • Dip of the cable decreases
  • Length of the cable increases

Answer :Dip of the cable decreases

Which one of the following laws is not applicable to a simple pendulum ?


Options are :

  • The time period is proportional to ?l where l is length
  • The time period is inversely proportional to ?g where g is the acceleration due to gravity
  • The time period does not depend on its magnitude
  • The time period is proportional to its length /

Answer :The time period is proportional to its length /

The ends of a string weighing w/metre are attached to two points at the same horizontal level. If the central dip is very small, the horizontal tension of the string throughout is:


A.


B.


C.


D.


Options are :

  • A
  • C
  • D
  • B

Answer :C

The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface:


Options are :

  • Uneven distribution of the gravitational field
  • Gravity of the sun and the moon
  • None of these
  • Aerodynamic forces

Answer :None of these

M.I. of a thin ring (external diameter D, internal diameter d) about an axis perpendicular to the plane of the ring, is:


A.

(D4 + d4)


B.

(D4 - d4)


C.

(D4 + d4)


D.

(D4 x d4)


Options are :

  • C
  • A
  • B
  • D

Answer :B

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