Q.1

Which of the following is a scalar quantity?

  • Force
  • Speed
  • Velocity
  • Acceleration
Q.2

The rate of change of displacement of a body is called

  • velocity
  • acceleration
  • momentum
  • none of these
Q.3

The unit of work in S.I. units is

  • newton
  • erg
  • kg-m
  • joule
Q.4

The static friction

  • bears a constant ratio to the normal reaction between the two surfaces
  • is independent of the area of contact, between the two surfaces
  • always acts in a direction, opposite to that in which the body tends to move
  • all of the above
Q.5

Which of the following is an equation of linear motion?(where, u and v = Initial and final velocity of the body, a = Acceleration of the body, and s = Displacement of the body in time t seconds.)

  • v = u + a.t
  • s = u.t + 1/2 a.t2
  • v2 = u2+2a.s
  • all of these
Q.6

The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then

  • P = Q
  • Q = R
  • Q = 2R
  • none of these
Q.7

If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.

  • change
  • does not change
Q.8

A framed structure is imperfect, if the number of members are __________ (2j - 3).

  • equal to
  • less than
  • greater than
  • either (b) or (c)
Q.9

The range of a projectile is maximum, when the angle of projection is

  • 30°
  • 45°
  • 60°
  • 90°
Q.10

The angle of inclination with the vertical is __________ if the cyclist is running at a faster speed than that when he is running at a slower speed.

  • more
  • less
Q.11

The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in magnitude and direction by the third side of a triangle, taken in opposite order.

  • True
  • False
Q.12

The bodies which rebound after impact are called

  • inelastic bodies
  • elastic bodies
  • neither elastic nor inelastic bodies
  • none of these
Q.13

The angle of inclination with the vertical is __________ if the cyclist is running at a faster speed than that when he is running at a slower speed.

  • more
  • less
Q.14

The loss of kinetic energy during inelastic impact, is given by(where m1 = Mass of the first body,m2 = Mass of the second body, and u1 and u2 = Velocities of the first and second bodies respectively.)

Q.15

The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.

  • Agree
  • Disagree
Q.16

The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

  • Newton's first law of motion
  • Newton's second law of motion
  • Newton's third law of motion
  • none of these
Q.17

The efficiency of a screw jack is maximum, when(where α = Helix angle, and φ = Angle of friction.)

  • α = 45° + φ/2
  • α = 45° - φ/2
  • α = 90° + φ
  • α = 90° - φ
Q.18

Onejoule is equal to

  • 0.1 N-m
  • 1 N-m
  • 10 N-m
  • 100 N-m
Q.19

Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then

  • their algebraic sum is zero
  • their lines of action are at equal distances
  • the algebraic sum of their moments about any point in their plane is zero
  • the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.
Q.20

The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad / s2, is

  • a = α/ r
  • a = α.r
  • a = r / α
  • none of these
Q.21

Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then

  • their algebraic sum is zero
  • their lines of action are at equal distances
  • the algebraic sum of their moments about any point in their plane is zero
  • the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.
Q.22

The centre of gravity of a hemisphere lies at a distance of 3r / 8 from its base measured along the vertical radius.

  • Correct
  • Incorrect
Q.23

The centre of gravity of a hemisphere lies at a distance of 3r / 8 from its base measured along the vertical radius.

  • Correct
  • Incorrect
Q.24

The coefficient of restitution for elastic bodies is one.

  • Correct
  • Incorrect
Q.25

The periodic time (T) is given by(where ω = Angular velocity of particle in rad / s.)

  • ω/2π
  • 2π/ω
  • 2π x ω
  • π/ω
Q.26


The above figure shows the two equal forces at right angles acting at a point. The value of force R acting along their bisector and in opposite direction is

  • P/2
    4-22-3.png
    4-22-4.png
  • 2P
    4-22-3.png
    4-22-4.png
Q.27

Whenever a force acts on a body and the body undergoes a displacement, then

  • work is said to be done
  • power is being transmitted
  • body has kinetic energy of translation
  • none of these
Q.28

The maximum height of a projectile on a horizontal plane, is

Q.29

The total energy possessed by a system of moving bodies

  • is constant at every instant
  • varies from point to point
  • is maximum in the start and minimum at the end
  • is minimum in the start and maximum at the end
Q.30

The centre of gravity of a right circular solid cone is at a distance of __________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)

  • h/2
  • h/3
  • h/4
  • h/6
Q.31

The centre of gravity of a right circular solid cone is at a distance of __________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)

  • h/2
  • h/3
  • h/4
  • h/6
Q.32

When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.

  • Correct
  • Incorrect
Q.33

The periodic time (T) is given by(where ω = Angular velocity of particle in rad / s.)

  • ω/2π
  • 2π/ω
  • 2π x ω
  • π/ω
Q.34

In actual machines, mechanical advantage is __________ velocity ratio.

  • equal to
  • less than
  • greater than
Q.35

The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

  • none of these
  • Newton's first law of motion
  • Newton's second law of motion
  • Newton's third law of motion
Q.36

Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

Q.37


The above figure shows the two equal forces at right angles acting at a point. The value of force R acting along their bisector and in opposite direction is

  • P/2
    4-22-3.png
    4-22-4.png
  • 2P
    4-22-3.png
    4-22-4.png
Q.38

A block ot masskg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will __________ with the increase in coefficient of friction.

  • increase
  • decrease
  • not be effected
Q.39

Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

Q.40
Coefficient of friction depends upon
  • Area of contact only
  • Nature of surface only
  • Both (A) and (B)
  • None of these
Q.41
According to law of triangle of forces
  • Three forces acting at a point will be in equilibrium
  • Three forces acting at a point can be represented by a triangle, each side being proportional to force
  • If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
  • If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
Q.42
An ideal machine is one whose efficiency is
  • Between 60 and 70 %
  • Between 70 and 80%
  • Between 80 and 90%
  • 100%
Q.43
Which of the following is not the unit of power?
  • kW (kilowatt)
  • hp (horse power)
  • kcal/sec
  • kcal/kg sec
Q.44
The velocity of a body on reaching the ground from a height h, is
  • 2.√(gh)
  • √(gh)
  • √(2gh)
  • 2g.√h
Q.45
The maximum mechanical advantage of a lifting machine is
  • 1 + m
  • 1 - m
  • 1 / m
  • m
Q.46
The velocity ratio for the third system of pulleys is
  • 2n - 1
  • n
  • n²
  • 2n
Q.47
The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by
  • ω/r
  • ω.r
  • ω²/r
  • ω².r
Q.48
According to Lami’s theorem
  • The three forces must be equal
  • The three forces must be at 120° to each other
  • The three forces must be in equilibrium
  • If the three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two
Q.49
The angle between two forces when the resultant is maximum and minimum respectively are
  • 0° and 180°
  • 180° and 0°
  • 90° and 180°
  • 90° and 0°
Q.50
Moment of inertia of a circular section about an axis perpendicular to the section is
  • πd3/16
  • πd3/32
  • πd4/32
  • πd4/64
0 h : 0 m : 1 s