# Engineering-Civil Engineering [MCQS] Applied Mechanics Section /2 Sample Test,Sample questions

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

1.30Â°

2.45Â°

3.60Â°

4. none of these.

## Question: ``` If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along```

1.the same line in the same sense

2.the same line in opposite sense

3. the perpendicular to both the lines

4.none of these.

## Question: ``` A Seconds pendulum executes```

1.0.5 beat per second

2.1.0 beat per second

3.2.0 beats per second

4.2.5 beats per second

1.zero

2.5 m/sec

3.10 m/sec

4.none of these.

1.oscillation

2.amplitude

3.periodic time

4.frequency.

1.57Â°.

2.58Â°.

3.60Â°.

4.60Â°.

1.P + Q

2.P/Q

3.Q/P

4. P - Q

## Question: ``` Lami's theroem states that```

1. three forces acting at a point are always in equilibrium

2. if three forces acting on a point can be represented in magnitude and direction by the sides of a triangle, the point will be in the state of equilibrium

3.three coplaner forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two

4.three coplaner forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two

1.17.5 kg

2.19.5 kg

3. 22.5 kg

4.25 kg

1.work/energy

2.work/time

3.work x time

4.work/distance.

## Question: ``` The resultant of the forces acting on a body will be zero if the body```

1.rotates

2.moves with variable velocity in a straight line

3. moves along a curved path

4.does not move at all.

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

1.a vector quantity

2.a scalar quantity

3. a scalar as well as a vector quantity

4.none of these.

## Question: ``` To avoid bending action at the base of a pier,```

1.suspension and anchor cables are kept at the same level

2. suspension and anchor cables are fixed to pier top

3.suspension cable and anchor cables are attached to a saddle mounted on rollers on top of the pier

4.none the these.

1.400 watts

2.500 watts

3.4000 watts

4.none of these.

1.0.5 m/sec

2. 1.5 m/sec

3.2.5 m/sec

4.3.5 m/sec

## Question: `A body is said to move with Simple Harmonic Motion if its acceleration, is`

1.always directed away from the centre, the point of reference

2. proportional to the square of the distance from the point of reference

3.proportional to the distance from the point of reference and directed towards it

4. inversely proportion to the distance from the point of reference

1.40 sec

2.30 sec

3.20 sec

4.15 sec

1.70 m/sec.

2.75 m/sec.

3.80 m/sec.

4.90 m/sec.

## Question: `A Second's pendulum gains 2 minutes a day. To make it to keep correct time its length`

1.must be decreased

2. must be increased

3.is not changed but weight of the bob is increased

4. is not changed but weight of the bob is decreased

1.48 kg

2.60 kg

3.72 kg

4.none of these.

## Question: `According to Law of Triangle of Forces`

1.three forces acting at a point, can be rep-resented by the sides of a triangle, each side being in proportion to the force

2.three forces acting along the sides of a triangle are always in equilibrium

3.if three forces acting on a, point can be represented.in magnitude and direction, by the sides of a triangle taken in order, these will be in equilibrium

4.if the forces acting on a particle be represented in magnitude and direction by the two sides of a triangle taken in order, their resultant will be represented in magnitude and direction by the third

1.60%

2.65%

3.70%

4.25%

## Question: `If the angle between the applied force and the direction of motion of a body, is between 90Â° and 180Â°, the work done, is called`

1.virtual work

2. imaginary work

3.zero work

4.negative work.

1.2 sec

2.3 sec

3.4 sec

4.5 sec

## Question: `ï»¿The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface`

1.uneven distribution of the gravitational field

2.gravity of the sun and the moon

3.aerodynamic forces

4.none of these.

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

1.is directly proportional to their velocity of approach

2.is inversely proportional to their velocity of approach

3. bears a constant ratio to their velocity of approach

4.is equal to the sum of their velocities of approach.

1.102.5 kg

2.105.5 kg

3.108.5 kg

4.110 kg.

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

1.dip of the cable increases

2. length of the cable increases

3.dip of the cable decreases

4.none of the these.

## Question: `The characteristic of a couple, is :`

1. algebraic sum of forces, constituting a couple is zero

2.algebraic sum of moments of forces, constituting a couple, about any poin, is same

3.a couple can be balanced only by a couple but of opposite sense

4. all the above.

## Question: `The following is not a law of static friction :`

1.The force of friction always acts in a direction opposite to that in which the body tends to move

2.The force of friction is dependent upon the area of contact

3.The force of friction depends upon the roughness of the surface

4.The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces.

## Question: `The following statement is one of the laws of Dynamic friction`

1.The force of friction always acts in a direction opposite to that in which a body is moving

2.The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction

3.For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed

4. all the above.

1.weight

2.mass

3.interia

4.momentum.

## Question: `The resolved part of the resultant of two forces inclined at an angle Î¸ in a given direction is`

1.algebraic sum of the resolved parts of the forces in the direction

2.arithmetical sum of the resolved parts of the forces in the direction

3.difference of the forces multiplied by cosine Î¸Â°

4. sum of the forces multiplied by the sine Î¸

1.parabolic

2.circular

3.catenary

4. elliptical.

1.5 Newtons

2.8 Newtons

3.10 Newtons

4.12 Newtons

## Question: `WEffect of a force on a body depends upon its`

1.direction

2.magnitude

3.position

4. all the above.

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