# Engineering/Civil Engineering [MCQS] Applied Mechanics Section -5 Sample Test,Sample questions

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

1.sum of resolved parts in any two directions at right angles, are both zero

2.algebraic sum of the forces is zero

3.two resolved parts in any two directions at right angles are equal

4. algebraic sum of the moments of the forces about the point is zero

## Question: ``` The centre of gravity of a plane lamina will not be at its geometrical centre if it is a```

1.circle

2.equilateral triangle

3.rectangle

4.square

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

1.2.44 times more

2.2.44 times less

3.3 times less

4.3 times more.

## Question: ``` The velocity of a moving body, is```

1.a vector quantity

2. a scalar quantity

3.a constant quantity

4.none of these.

1.moon

2.earth

3.sun

4.pole

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

1.the extreme point of the oscillation

2. through the mean position

3.through a point at half amplitude

4. none of these.

1.less than 60%

2.50%

3.more than 50%

4.None of these.

1.4.5 cm

2.5.0 cm

3. 5.25 cm

4.5.5 cm.

1.0.25

2.0.5

3.0.67

4.0.33

## Question: ``` On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts```

1. downwards at its upper end

2.upwards at its upper end

3.perpendicular to the wall at its upper end

4.zero at its upper end

## Question: ``` Periodic time of body moving with simple harmonic motion, is```

1. directly proportional to its angular velocity

2.directly porportional to the square of its angular velocity

3. inversly proportional to the square of its angular velocity

4.inversely proportional to its angular velocity.

1.zero

2. 0.5 m/sec

3.1.0 m/sec

4.2.0 m/sec.

1.16 m/sec

2.18 m/sec

3.20 m/sec

4.22 m/sec

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

1.simple pendulum

2.compour pendulum

3. Second's pendulum

4.none of these.

## Question: `Centre of gravity of a thin hollow cone lies on the axis of symmmetry at a height of`

1.one-half of the total height above base

2.one-third of the total height above base

3.one-fourth of the total height above base

4.none of these.

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

1. rotate about itself without moving

2.move in any one direction rotating about itself

3.be completely at rest

4.all the above.

## Question: `﻿The centre of gravity of a homogenous body is the point at which the whole`

1.volume of the body is assumed to be concentrated

2.area of the surface of the body is assumed to be concentrated

3.weight of the body is assumed to be concentrated

4.all the above.

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

1.half oscillation

2.quarter oscillation

3.complete oscillation

4.none of these.

## Question: `Pick up the correct statement from the following :`

1.If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities.

2.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.

3. If a smooth sphere impinges on another sphere, which is at rest, the latter will move along the line of centres.

4.All the above.

## Question: `Pick up the incorrect statement from the following. In a simple harmonic motion`

1.velocity is maximum at its mean position

2.velocity is minimum at the end of the storke

3.acceleration is minimum at the end of the stroke

4.acceleration is zero at the mean position.

1.7.5 cm

2.5.0 cm

3.8.75 cm

4.7.85 cm

1.0.2 R

2.0.3 R

3.0.4 R

4.0.5 R

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

1.to be zero

2.to be maximum

3.to be minimum

4. none of the these.

## Question: `The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of`

1.8.04 km/sec at a height of 285 km

2.11.11 km/sec at a height of 37, 400 km

3.11.26 km/sec, the satellite escapes the pull of the earth

4.All the above.

## Question: `The motion of a bicycle wheel is`

1.translatory

2.rotary

3. rotary and translatory

4.curvilinear

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

1. half an oscillation

2.one full oscillation

3.two oscillations

4.none of these.

1. 5.88 m/sec

2.8.88 m/sec

3.10.88 m/sec

4.12.88 m/sec.

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

1.Virtual centre

2.Instantaneous centre

3.Instantaneous axis

4.All the above.

1.erg

2.joule

3.Newton

4.dyne.

1.velocity

2.acceleration

3.speed

4.none of these.

1.eastward

2.northward

3.westward

4.southward

1. sin θ

2.cos θ

3.tan θ

4.cosec θ.

1. 5.5 kg

2.6.25 kg

3.8.75 kg

4. 10.5 kg.

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

1.maximum weight

2.minimum weight

3.no weight

4.no effect on its weight.

## Question: `When a body moves round a fixed axis, it has`

1. a rotary motion

2.a circular motion

3.a translatory

4.a rotary motion and translatory motion.

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