Q.1

Work may be defined as

  • force x distance
  • force x velocity
  • force x acceleration
  • none of these.
Q.2

The length of a Second's pendulum, is

  • 99.0 cm
  • 99.4 cm
  • 100 cm
  • 101 cm
  • 101.10 cm.
Q.3

A cable loaded with 0.5 tonne per horizontal metre span is stretched between supports in the same horizontal linem apart. If central dip ism, the minimum tension in the cable, will be

  • 200 tonnes at the centre
  • 500 tonnes at the centre
  • 200 tonnes at the right support
  • 200 tonnes at the left support.
Q.4

The centre of gravity of a triangle is at the point where three

  • medians of the triangle meet
  • perpendicular bisectors of the sides of the triangle meet
  • bisectors of the angle of the triangle meet
  • none of these.
Q.5

If the gravitational accelerational at any place is doubled, the weight of a body, will

  • be reduced to half
  • be doubled
  • not be affected
  • none of these.
Q.6

u1 and u2 are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are v1 and v2. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by

Q.7

To attain the synchronous orbit, the launch of a satellite, is done from a place

  • on equator
  • on 30° latitude
  • on 45° latitude
  • on 60° latitude
  • on the poles.
Q.8

A particle moves along a straight line such that distance x traversed in t seconds is given by x = t2(t + 1), the acceleration of the particle, will be

  • 3t3 - 2t
  • 3t2 + 2t
  • 6t - 2
  • 6t + 2
  • 3t - 2
Q.9

The forces which meet at one point and have their lines of action in different planes are called

  • coplaner non-concurrent forces
  • non-coplaner concurrent forces
  • non-coplaner non-current forces
  • intersecting forces
  • none of these.
Q.10

If g1 and g2 are the gravitational accelerations on two mountains A and B respectively, the weight of a body when transported from A to B will be multiplied by

  • g1
    112-5.162-1.png
    112-5.162-2.png
  • g2
    112-5.162-1.png
    112-5.162-2.png
Q.11

The Law of Polygon of Forces states that

  • if a polygen representing the forces acting at point in a body is closed, the forces are in equilibrium
  • if forces acting on a point can be represented in magnitde and direction by the sides of a polygon taken in order, then the resultant of the forces will be represented in magnitude and direction by the closing side of the polygon
  • if forces acting on a point can be represented of a polygon taken in order, their sides of a polygon taken in order, their resultant will be represented in magnitude and direction by the closing side of the polygon, taken in opposite order
  • if forces acting on a point can be represented in magnitude and direction by the sides of a polygon in order, the forces are in equilibrium.
Q.12

At a given instant ship A is travelling at 6 km/h due east and ship B is travelling at 8 km/h due north. The velocity of B relative to A is

  • 7 km/hrs
  • 2 km/hrs
  • 1 km/hrs
  • 10 km/hrs
  • 14 km/hrs.
Q.13

Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by

  • its longer side"
  • its shorter side"
  • the diagonal of the parallelogram which does not pass through the point of intersection of the forces"
  • the diagonal of the parallelogram which passes through the point of intersection of the forces"
  • half the sum of the diagonals".
Q.14

The equation of motion of a particle starting from rest along a straight line is x = t3 - 3t2 +The ratio of the accelerations after 5 sec and 3 sec will be

  • 2
  • 3
  • 4
  • 5
Q.15

Which one of the following statements is true ?

  • The tangent of the angle of friction is equal to coefficeint of friction
  • The angle of repose is equal to angle of friction
  • The tangent of the angle of repose is equal to coefficient of friction
  • All the above.
Q.16

The locus of the instantaneous centre of a moving rigid body, is

  • straight line
  • involute
  • centroid
  • spiral.
Q.17

u1 and u2 are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are v1 and v2. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by

Q.18
Joule is the unit of
  • work
  • force
  • power
  • torque
  • E. none of these.
Q.19
One Joule is equivalent to
  • 9.81 Newton metre
  • 1 Newton metre
  • 1 kg wt metre
  • 1 dyne metre
Q.20
One Newton is equivalent to
  • 1 kg. wt
  • 9.81 kg. wt
  • 981 dyne
  • 1/9.81 kg. wt
Q.21
The tension in a cable supporting a lift
  • is more when the lift is moving downwards
  • is less when the lift is moving upwards
  • remains constant whether its moves downwards or upwards
  • is less when the lift is moving downwards.
Q.22
Effect of a force on a body depends upon its
  • Direction
  • Magnitude
  • Position
  • All the above
Q.23
The motion of a bicycle wheel is
  • Translatory
  • Rotary
  • Rotary and translatory
  • Curvilinear
Q.24
Work may be defined as
  • force x distance
  • force x velocity
  • force x acceleration
  • none of these.
Q.25
The force polygon representing a set of forces in equilibrium is a
  • Triangle
  • Open polygon
  • Closed polygon
  • Parallelogram
Q.26
On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts
  • Towards the wall at its upper end
  • Away from the wall at its upper end
  • Upwards at its upper end
  • Downwards at its upper end
Q.27
A load ofkg was lifted through a distance ofcm. by an effort ofkg which moved through a distance ofcm. The efficiency of the lifting machine is
  • 50%
  • 40%
  • 55%
  • 30%.
Q.28
Pick up the correct statement from the following. The kinetic energy of a body
  • Before impact is equal to that after impact
  • Before impact is less than that after impact
  • Before impact is more than that after impact
  • Remain constant
Q.29
The vertical reaction at the support ‘A’ of the structure shown in below figure, is
  • 1 t
  • 2 t
  • 3 t
  • 3.5 t
Q.30
In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics?
  • Howe truss
  • King post truss
  • Fink truss
  • Warren truss
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