Engineering MCQ Quiz Hub

1. The point, through which the whole weight of the body acts, irrespective of its position, is known as
moment of inertia
centre of gravity
centre of percussion
centre of mass

2. Which of the following is a scalar quantity?
Force
Speed
Velocity
Acceleration

3. The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
none of these

4. In ideal machines, mechanical advantage is __________ velocity ratio.
equal to
less than
greater than
none of these

5. The minimum force required to slide a body of weight W on a rough horizontal plane is
W sin θ
W cos θ
W tan θ
none of these

6. The angular velocity (in rad / s) of a body rotating at N revolutions per minute is
πN/60
πN/180
2πN/60
2πN/180

7. The maximum efficiency of a lifting machine is
1/m
V.R./m
m/V.R.
1/(m x V.R.)

8. The centre of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.
3r/ 8
4r/ 3π
8r/3
3r/4π

9. A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is
reversible
non-reversible
ideal
none of these

10. The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.
equal to
. less than
greater than
none of these

11. The motion of a particle round a fixed axis is
translatory
rotary
circular
translatory as well as rotatry

12. The principle of transmissibility of forces states that, when a force acts upon a body, its effect is
same at every point on its line of action
different at different points on its line of action
minimum, if it acts at the centre of gravity of the body
minimum, if it acts at the centre of gravity of the body

13. A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is
5
10
20
40

14. Which of the following are vector quantities?
Linear displacement
Linear velocity
Linear acceleration
all of these

15. Non-coplaner concurrent forces are those forces which
meet at one point, but their lines of action do not lie on the same plane
do not meet at one point and their lines of action do not lie on the same plane
meet at one point and their lines of action also lie on the same plane
do not meet at one point, but their lines of action lie on the same plane

16. Which of the following statement is correct?
The kinetic energy of a body during impact remains constant.
The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact.
The kinetic energy of a body before impact is less than the kinetic energy of a body after impact.
The kinetic energy of a body before impact is more than the kinetic energy of a body after impact.

17. Concurrent forces are those forces whose lines of action
lie on the same line
meet at one point
meet on the same plane
none of these

18. According to the law of moments, if a number of coplaner forces acting on a particle are in equilibrium, then
their algebraic sum is zero
their lines of action are at equal distances
the algebraic sum of their moments about any point in their plane is zero
the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.

19. A machine having an efficiency less than 50%, is known as
reversible machine
non-reversible machine
neither reversible nor non-reversible machine
ideal machine

20. The total momentum of a system of masses (i. e. moving bodies) in any one direction remains constant, unless acted upon by an external force in that direction. This statement is called
Newton's first law of motion
Newton's second law of motion
principle of conservation of energy
principle of conservation of energy

21. A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of
1m
2m
3m
4m

22. When the spring of a watch is wound, it will possess
strain energy
kinetic energy
heat energy
electrical energy

23. The rate of doing work is known as
potential energy
kinetic energy
power
none of these

24. The unit of work in S.I. units is
newton
erg
kg-m
joule

25. The static friction
bears a constant ratio to the normal reaction between the two surfaces
is independent of the area of contact, between the two surfaces
always acts in a direction, opposite to that in which the body tends to move
all of the above

26. The acceleration of a particle moving with simple harmonic motion is __________ at themean position.
zero
minimum
maximum
none of these

27. The velocity of a particle moving with simple harmonic motion is __________ at the mean position.
zero
minimum
maximum
none of these

28. A framed structure is imperfect, if the number of members are __________ (2j - 3).
equal to
less than
greater than
either (b) or ©

29. The total energy possessed by a system of moving bodies
is constant at every instant
varies from point to point
is maximum in the start and minimum at the end
is minimum in the start and maximum at the end

30. A couple produces
translatory motion
rotational motion
combined translatory and rotational motion
none of the above

31. For a self locking machine, the efficiency must be
equal to 50%
less than 50%
greater than 50%
100%

32. The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then
P = Q
Q = R
Q = R
none of these

33. Onejoule is equal to
0.1 N-m
1 N-m
10 N-m
100 N-m

34. Whenever a force acts on a body and the body undergoes a displacement, then
work is said to be done
work is said to be done
body has kinetic energy of translation
none of these

35. The rate of change of displacement of a body is called
velocity
acceleration
momentum
none of these