Engineering MCQ Quiz Hub

1. 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 velocity ratio of the lifting machine is"
50
55
60
65

2. The angle of friction is :
The ratio of the friction and the normal reaction
The force of friction when the body is in motion
The angle between the normal reaction and the resultant of normal raction and limiting friction
The force of friction at which the body is just about to move.

3. The motion of a particle is described by the relation x = t2- 10t + 30, where x is in metres and t in seconds. The total distance travelled by the particle from t = 0 to t = 10 seconds would be
zero
30 m
50 m
none of these.

4. Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and
concurrent
parallel
concurrent parallel
none of these.

5. For perfectly elastic bodies, the value of coefficient of restitution is
zero
0.5
1
between 0 and 1.

6. 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.

7. If two forces of 3 kg and 4 kg act at right angles to each other, their resultant force will be equal to
7 kg
1 kg
5 kg
none of these.

8. Two shots fired simultaneously from the top and bottom of a vertical tower with elevations of 30° and 45° respectively strike a target simultaneously. If horizontal distance of the target from the tower is 1000 m, the height of the tower is
350 m
375 m
400 m
425 m

9. A stone of mass 1 kg is tied to a string of length 1 m and whirled in a horizontal circle at a constant angular speed 5 rad/sec. The tension in the string is
5 N
10 N
15 N
25 N

10. The apparent weight of a man in a moving lift is less than his real weight when it is going down with
uniform speed
an acceleration
linear momentum
retardation.

11. P is the force acting on a body whose mass is m and acceleration is f. The equation P - mf = 0, is known as
equation of dynamics
equation of dynamic equilibrium
equation of statics
none of these.

12. Newtons's Law of Motion is :
Every body continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
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
To every action, there is always an equal and opposite reaction
All the above.

13. Two particles have been projected at angles 64° and 45° to the horizontal. If the velocity of projection of first is 10 m/sec, the velocity of projection of the other for equal horizontal ranges is
9.3 m/sec
8.3 m/sec
7.3 m/sec
6.3 m/sec.

14. The necessary condition of equilibrium of a body, is :
algebraic sum of horizontal components of all the forces must be zero
algebraic sum of vertical components of all the forces must be zero
algebraic sum of the moments of the forces about a point must be zero
all (a), (b) and (c).

15. A trolley wire weighs 1 kg per metre length The ends of the wire are attached to two poles 20 m apart If the horizontal tension is 1000 kg, the central dip of the cable is
2 cm
3 cm
4 cm
5 cm

16. Principle of Transmissibility of Forces states that, when a force acts upon a body, its effect is
maximum if it acts at the centre of gravity of the body
different at different points on its line of
same at every point on its line of action
minimum if it acts at the C.G. of the body

17. A ball is dropped from a height of 2.25 m on a smooth floor and rises to a height of 1.00 m after the bounce. The coefficient of restitution between the ball and the floor is
0.33
0.44
0.57
67

18. If the linear velocity of a point on the rim of a wheel of 10 m diameter, is 50 m/sec, its angular velocity will be
20 rad/sec
15rad/sec
10 rad/sec
5 rad/sec

19. A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is
0.25
0.5
0.75
1

20. The force acting on a point on the surface of a rigid body may be considered to act
at the centre of gravity of the body
on the periphery of the body
on any point on the line of action of the force
at any point on the surface normal to the line of action of the force.

21. 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
10,000 per hour
11,000 km per hour

22. Pick up the incorrect statement from the following
The C.G. of a circle is at its centre
The C.G. of a triangle is at the intersecton of its medians
The C.G. of a rectangle is at the intersection of its diagonals
The C.G. of a semicircle is at a distance of r/2 from the centre

23. A 49 kg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale reads 69 kg. The velocity of the elevator will be
10 m/sec
15 m/sec
20 m/sec
25 m/sec

24. Pick up the correct statement from the following. A rubber ball when strikes a wall rebounds but a lead ball of same mass and velocity when strikes the same wall, falls down
rubber and lead balls undergo equal changes in momentum
change in momentum suffered by lead ball is less that of rubber ball
momentum of rubber ball is less than that of lead ball
none of these.

25. The instantaneous centre of a member lies at the point of intersection of two lines drawn at the ends of the member such that the lines are inclined to the direction of motion of the ends at
30°
45°
60°
90°

26. A rod 5 m in length is moving in a vertical plane. When it is inclined at 60° to horizontal, its lower end is moving horizontally at 3 m/sec and upper end is moving in vertical direction. The velocity of its upper end, is
0.5 m/sec
1.0 m/sec
1.5 m/sec
2.5 m/sec