Online Civil Engineering Test - Applied Mechanics Test

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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The resultant of two forces P and Q acting at an angle θ, is

P² + Q² + 2P sin θ

P² + Q² + 2PQ cos θ

P² + Q² + 2PQ tan θ

[#]

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

a uniform retardation

a uniform acceleration

a variable acceleration

a variable retardation

none of these.

[#]

Maximum efficiency of a screw jack for the angle of friction φ, is

[#]

One Newton force, is

10³ dynes

10⁴ dynes

10⁵ dynes

10⁶ dynes

10⁷ dynes.

[#]

Two forces of 6 Newtons and 8 Newtons which are acting at right angles to each other, will have a resultant of

5 Newtons

8 Newtons

10 Newtons

12 Newtons.

[#]

Pick up the correct statement from the following for the structure shown in below figure.

The horizontal reaction at A is 23t ←

The horizontal reaction at C is 23t →

The vertical reaction at A is zero

The vertical reaction at C is 2 t ↑

All the above.

[#]

The maximum frictional force which comes into play, when a body just begins to slide over the surface of a an other body, is known

sliding friction

rolling friction

limiting friction

none of these.

[#]

Time of flight of a projectile on a horizontal plane, is

[#]

If v and ω are linear and angular velocities, the centripetal acceleration of a moving body along the circular path of radius r, will be

rω.

[#]

10.

A satellite is said to move in a synchronous orbit if it moves at an altitude of 36, 000 km with a maximum velocity of about

7000 km per hour

8000 km per hour

9000 km per hour

10, 000 per hour

11, 000 km per hour.

[#]

11.

A smooth cylinder lying on its convex surface remains

in stable equilibrium

in unstable equilibrium

in neutral equilibrium

out of equilibrium

none of these.

[#]

12.

A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is

0°

30°

45°

60°

90°.

[#]

13.

According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centres lie on

a point

a straight line

two straight lines

a triangle.

[#]

14.

A point subjected to a number of forces will be in equilibrium, if

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

algebraic sum of the forces is zero

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

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

none of these.

[#]

15.

Pick up the incorrect statement from the following. In a simple harmonic motion

velocity is maximum at its mean position

velocity is minimum at the end of the storke

acceleration is minimum at the end of the stroke

acceleration is zero at the mean position.

[#]

16.

A ball of mass 1 kg moving with a velocity of 2 m/sec collides a stationary ball of mass 2 kg and comes to rest after impact. The velocity of the second ball after impact will be

zero

0.5 m/sec

1.0 m/sec

2.0 m/sec.

[#]

17.

The practical units of work, is

erg

joule

Newton

dyne.

[#]

18.

For a self-locking machine, the efficiency should be

less than 60%

50%

more than 50%

None of these.

[#]

19.

The velocity ratio of an inclined plane of inclination θ with horizontal for lifting a load is

sin θ

cos θ

tan θ

sec θ

cosec θ.

[#]

20.

In the structure shown in below figure, the member which carries zero force, is

All the above.

[#]

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Online Civil Engineering Test - Applied Mechanics Test

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