## Applied Mechanics MCQ Practice Questions (Civil Engineering) Set 1

##### The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is:

Options are :

• 1.885 m/sec
• 0.18845 m/sec
• 188.5 m/sec
• 18.85 m/sec

##### The Law of Polygon of Forces states that:

Options are :

• 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
• 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 a polygen representing the forces acting at point in a body is closed, the forces are in equilibrium

Answer :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

##### 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:

Options are :

• 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"
• Its shorter side"
• Half the sum of the diagonals"
• Its longer side"

Answer :The diagonal of the parallelogram which passes through the point of intersection of the forces"

Options are :

• 5
• 4
• 3
• 2

##### If a body moves in such a way that its velocity increases by equal amount in equal intervals of time, it is said to be moving with:

Options are :

• A uniform retardation
• A uniform acceleration
• None of these
• A variable retardation
• A variable acceleration

Options are :

• 1
• 2
• 5
• 4
• 3

Options are :

• C
• B
• D
• A

Options are :

• 20 kg
• 40 kg
• 35 kg
• 25 kg
• 30 kg

Options are :

• 1 km/hrs
• 10 km/hrs
• 14 km/hrs
• 7 km/hrs
• 2 km/hrs

Options are :

• Impulse
• Moment
• Power
• Momentum

Options are :

• 100 g
• 40 g
• 80 g
• 60 g

##### The tension in a cable supporting a lift:

Options are :

• Is less when the lift is moving upwards
• Is less when the lift is moving downwards
• Remains constant whether its moves downwards or upwards
• Is more when the lift is moving downwards

Answer :Is less when the lift is moving downwards

Options are :

• 1.00 m/sec
• 0.01 m/sec
• 0.05 m/sec
• 1.5 m/sec

Options are :

• A
• C
• B
• D

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

Options are :

• The gravitational intensity declines with height
• All the above
• Nature plays an important role in the launch of a satellite
• The earth's gravity reduces the speed of a satellite by 32 km per second
• The gravitational force relents as the satellite climbs higher

Options are :

• h/3
• h/4
• h/6
• h/2
• h/5

##### The angle which an inclined surface makes with the horiontal when a body placed on it is on the point of moving down, is called:

Options are :

• None of these
• Angle of friction
• Angle of inclination
• Angle of repose

##### The unit of Moment of Inertia of a body, is:

Options are :

• m^(4)
• m^(3)
• None of these
• m^(2)
• m

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

Options are :

• None of these
• Medians of the triangle meet
• Bisectors of the angle of the triangle meet
• Perpendicular bisectors of the sides of the triangle meet

Answer :Medians of the triangle meet

##### Engineer's units of force, is:

Options are :

• All the above
• Newton in absolute units
• Newton and dyne in absolute units
• Dyne in absolute units

Options are :

• B
• D
• E
• C
• A

Options are :

• A
• B
• C
• D

Options are :

• 101.10 cm
• 101 cm
• 99.4 cm
• 100 cm
• 99.0 cm

Options are :

• 55%
• 40%
• 30%
• 50%

Options are :

• 10^(3) dynes
• 10^(6) dynes
• 10^(7) dynes
• 10^(4) dynes
• 10^(5) dynes

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

Options are :

• Straight line
• Centroid
• Involute
• Spiral

##### Which one of the following statements is true ?

Options are :

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

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

Options are :

• None of these
• Not be affected
• Be reduced to half
• Be doubled

Options are :

• 3 t
• 2 t
• 1 t
• 2.5 t

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

Options are :

• on 30° latitude
• on the poles
• on 60° latitude
• on 45° latitude
• on equator