Engineering MCQ Quiz Hub

1. The centre of gravity of a triangle is at the point where three
medians of the triangle meet
perpendicular bisectors of the sides of the triangle meet
bisectors of the angle of the triangle meet
none of these.

2. The forces which meet at one point and have their lines of action in different planes are called
coplaner non-concurrent forces
non-coplaner concurrent forces
non-coplaner non-current forces
intersecting forces

3. At a given instant ship A is travelling at 6 km/h due east and ship B is travelling at 8 km/h due north. The velocity of B relative to A is
7 km/hrs
2 km/hrs
1km/hrs
10 km/hrs

4. The equation of motion of a particle starting from rest along a straight line is x = t3 - 3t2 + 5. The ratio of the accelerations after 5 sec and 3 sec will be
2
3
4
5

5. The locus of the instantaneous centre of a moving rigid body, is
straight line
involute
centroid
spiral.

6. A projectile is thrown at an angle a to the horizontal with α velocity v. It will have the maximum centripetal acceleration
at the start
at the top of the trajectory
as it strikes the ground
else where.

7. 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

8. If the gravitational accelerational at any place is doubled, the weight of a body, will
be reduced to half
be doubled
not be affected
none of these.

9. A cable loaded with 0.5 tonne per horizontal metre span is stretched between supports in the same horizontal line 400 m apart. If central dip is 20 m, the minimum tension in the cable, will be
200 tonnes at the centre
500 tonnes at the centre
200 tonnes at the right support
200 tonnes at the left support.

10. The Law of Polygon of Forces states that
if a polygen representing the forces acting at point in a body is closed, 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 th
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
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.

11. 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
its longer side"
its shorter side"
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"

12. Which one of the following statements is true ?
The tangent of the angle of friction is equal to coefficeint of friction
The angle of repose is equal to angle of friction
The tangent of the angle of repose is equal to coefficient of friction
All the above.

13. The product of mass and velocity of a moving a body, is called
moment
momentum
power
impulse.

14. Engineer's units of force, is
Newton in absolute units
Dyne in absolute units
Newton and dyne in absolute units
All the above.

15. Joule is the unit of
work
force
power
torque

16. The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is
188.5 m/sec
18.85 m/sec
1.885 m/sec
0.18845 m/sec.

17. The masses of two balls are in the ratio of 2 : 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is , the velocities of separation of the balls will be equal to
original velocity in the same direction
half the original velocity in the same direction
half the original velocity in the opposite direction
original velocity in the opposite direction

18. 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
angle of repose
angle of friction
angle of inclination
none of these.

19. Work may be defined as
force x distance
force x velocity
force x acceleration
none of these.

20. A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be
0.01 m/sec
0.05 m/sec
1.00 m/sec
1.5 m/see.

21. The tension in a cable supporting a lift
is more when the lift is moving downwards
is less when the lift is moving upwards
remains constant whether its moves downwards or upwards
is less when the lift is moving downwards.

22. A satellite moves in its orbit around the earth due to
Gravitational force
Centripetal force
Centrifugal force
none of these.

23. If three rigid rods are hinged together to form a triangle and are given rotary as well as translatory motion, the number of instantaneous centres of the triangle, will be
1
2
3
4

24. The mechanical advantage of an ideal machine is 100. For moving the local through 2 m, the effort moves through
0.02 m
2 m
2.5 m
20 m.

25. When a body in equilibrium undergoes an infinitely small displacement, work imagined to be done, is known as
imaginary work
negative work
virtual work
none of these.

26. To attain the synchronous orbit, the launch of a satellite, is done from a place
on equator
on 30° latitude
on 45° latitude
on 60° latitude

27. Pick up the correct statement from the following :
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
All the above.

28. If the radius of the earth is 600 km the height of a mountain above sea level at the top of which a beat seconds pendulum at sea level, looses 27 seconds a day, is
500 metres
1000 metres
1500 metres
2000 metres

29. The total time of collision and restitution of two bodies, is called
time of collision
period of collision
period of impact
all the above.

30. The length of a Second's pendulum, is
99.0 mm
99.4 mm
100 cm
101 cm

31. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The efficiency of the lifting machine is
50%
40%
55%
30%

32. A string of length 90 cm is fastened to two points A and B at the same level 60 cm apart. A ring weighing 120 g is slided on the string. A horizontal force P is applied to the ring such that it is in equilibrium vertically below B. The value of P is :
40 g
60 g
80 g
100 g

33. Two forces act an angle of 120°. If the greater force is 50 kg and their resultant is perpendicular to the smaller force, the smaller force is
20 kg
25 kg
30 kg
35 kg

34. The C.G. of a right circular cone lies on its axis of symmetry at a height of
h/2
h/3
h/4
h/5

35. A uniform rod 9 m long weighing 40 kg is pivoted at a point 2 m from one end where a weight of 120 kg is suspended. The required force acting at the end in a direction perpendicular to rod to keep it equilibrium, at an inclination 60° with horizontal, is
40 kg
60 kg
10 kg
100 kg

36. If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is
8°
9°
10°
11°