Engineering MCQ Quiz Hub

1. The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface
uneven distribution of the gravitational field
gravity of the sun and the moon
aerodynamic forces
none of these.

2. Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation
is directly proportional to their velocity of approach
is inversely proportional to their velocity of approach
bears a constant ratio to their velocity of approach
is equal to the sum of their velocities of approach.

3. 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

4. A projectile is fired with a velocity of 100.3 m/sec. at an elevation of 60°. The velocity attained by the projectile when it is moving at a height of 100 m, is
70 m/sec.
75 m/sec.
80 m/sec.
90 m/sec.

5. A body is said to move with Simple Harmonic Motion if its acceleration, is
always directed away from the centre, the point of reference
proportional to the square of the distance from the point of reference
proportional to the distance from the point of reference and directed towards it
inversely proportion to the distance from the point of reference

6. One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The reaction between the sphere and the wall of the arrangement made is
102.5 kg
105.5 kg
108.5 kg
110 kg.

7. WEffect of a force on a body depends upon its
direction
magnitude
position
all the above.

8. The resultant of the forces acting on a body will be zero if the body
rotates
moves with variable velocity in a straight line
moves along a curved path
does not move at all.

9. A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45° and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be
0.5 m/sec
1.5 m/sec
2.5 m/sec
3.5 m/sec

10. A Seconds pendulum executes
0.5 beat per second
1.0 beat per second
2.0 beats per second
2.5 beats per second

11. For maximum range of a projectile, the angle of projection should be
30°
45°
60°
none of these.

12. A particle moves with a velocity of 2 m/sec in a straight line with a negative acceleration of 0.1 m/sec2. Time required to traverse a distance of 1.5 m, is
40 sec
30 sec
20 sec
15 sec

13. According to Law of Triangle of Forces
three forces acting at a point, can be rep-resented by the sides of a triangle, each side being in proportion to the force
three forces acting along the sides of a triangle are always in equilibrium
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
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

14. A Second's pendulum gains 2 minutes a day. To make it to keep correct time its length
must be decreased
must be increased
is not changed but weight of the bob is increased
is not changed but weight of the bob is decreased

15. The following is not a law of static friction :
The force of friction always acts in a direction opposite to that in which the body tends to move
The force of friction is dependent upon the area of contact
The force of friction depends upon the roughness of the surface
The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces.

16. The velocity of a moving body, is
a vector quantity
a scalar quantity
a scalar as well as a vector quantity
none of these.

17. A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be
48 kg
60 kg
72 kg
none of these.

18. The resolved part of the resultant of two forces inclined at an angle θ in a given direction is
algebraic sum of the resolved parts of the forces in the direction
arithmetical sum of the resolved parts of the forces in the direction
difference of the forces multiplied by cosine θ°
sum of the forces multiplied by the sine θ

19. The following statement is one of the laws of Dynamic friction
The force of friction always acts in a direction opposite to that in which a body is moving
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
For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed
all the above.

20. A 50 kg boy climbs up a 8 m rope in gymnasiam in 10 sec. The average power developed by the boy is approximately
400 watts
500 watts
4000 watts
none of these.

21. Lami's theroem states that
three forces acting at a point are always in equilibrium
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
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
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

22. Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature,
dip of the cable increases
length of the cable increases
dip of the cable decreases
none of the these.

23. If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along
the same line in the same sense
the same line in opposite sense
the perpendicular to both the lines
none of these.

24. For lifting a load of 50 kg through a distance of 2.5 cm, an effort of 12.5 kg is moved through a distance of 40 cm. The efficiency of the lifting machine, is
60%
65%
70%
25%

25. Power can be expressed as
work/energy
work/time
work x time
work/distance.

26. If two forces P and Q (P > Q) act on the same straight line but in opposite direction, their resultant, is
P + Q
P/Q
Q/P
P - Q

27. If the angle between the applied force and the direction of motion of a body, is between 90° and 180°, the work done, is called
virtual work
imaginary work
zero work
negative work.

28. To avoid bending action at the base of a pier,
suspension and anchor cables are kept at the same level
suspension and anchor cables are fixed to pier top
suspension cable and anchor cables are attached to a saddle mounted on rollers on top of the pier
none the these.

29. For a body moving with simple harmonic motion, the number of cycles per second, is known as its
oscillation
amplitude
periodic time
frequency.

30. If the horizontal range is 2.5 times the greatest height, the angle of projection of the projectile, is
57°.
58°.
60°.
60°.

31. The shape of a suspended cable under its own weight, is
parabolic
circular
catenary
elliptical.

32. ime required to stop a car moving with a velocity 20 m/sec within a distance of 40 m, is
2 sec
3 sec
4 sec
5 sec

33. The characteristic of a couple, is :
algebraic sum of forces, constituting a couple is zero
algebraic sum of moments of forces, constituting a couple, about any poin, is same
a couple can be balanced only by a couple but of opposite sense
all the above.

34. Ball A of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/s hits an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after impact would be
zero
5 m/sec
10 m/sec
none of these.

35. One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The tension in the string is
17.5 kg
19.5 kg
22.5 kg
25 kg

36. The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is
weight
mass
interia
momentum.