Wednesday, September 5, 2018

Applied Mechanics most imp mcq



Applied Mechanics most imp mcq


' Applied Mechanics is the application of mechanics to solve problems relating common engineering elements. The goal of this Applied Mechanics course is to interpretation students to problems in mechanics as applied to plausibly real-world situations.
Applied mechanics (also engineering mechanics) is a division of the physical sciences and the practical application of mechanics. Applied mechanics, bridges the gap among physical theory and its application to technology.so lets we start study of applied mechanics important questions and answer which is important for technical interview and for technical examination also…...




01.Joule is the unit of

Work.

02.The forces which meet at one point and have their lines of action in different planes are called

non-coplanar concurrent forces.

03.A satellite moves in its orbit around the earth due to

Centripetal force.

04.The center of gravity of a triangle is at the point where three

medians of the triangle meet.

05.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.

06.The angle which an inclined surface makes with the horizontal when a body placed on it is on the point of moving down, is called

angle of repose.

07.Engineer’s units of force are

Newton in absolute unit.

08.If the gravitational acceleration at any place is doubled, the weight of a body, will

be doubled.

09.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 variable acceleration.

10.Work may be defined as a

force x distance.

11.The tension in a cable supporting a lift

is less when the lift is moving downwards.

12.The locus of the instantaneous center of a moving rigid body, is

Centroid.

13.Newton’s law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation

bears a constant ratio to their velocity of approach.

14.The total time of collision and restitution of two bodies, is called
1. period of impact
2. period of collision
3. time of collision
4. all the above.

15.The length of a Second’s pendulum, is

99.4 cm.


16.A body is said to move with Simple Harmonic Motion if its acceleration, is

proportional to the distance from the point of reference and directed towards it.

17.When a body in equilibrium undergoes an infinitely small displacement, work imagined to be done, is known as

virtual work.

18.A Seconds pendulum executes

2.0 beats per second.

19.The resultant of the forces acting on a body will be zero if the body

does not move at all.

20.A Second’s pendulum gains 2 minutes a day. To make it to keep correct time its length

must be increased.

21.Effect of a force on a body depends upon its
1. magnitude
2. position
3. direction
4. all above.

22. Question For a body moving with simple harmonic motion, the number of cycles per second, is known as its

Frequency.

23. The angle of friction is:

The angle between the normal reaction and the resultant of normal reaction and limiting friction.

24. 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 opposite sense.

25. The velocity of a moving body, is

a vector quantity.

26. To avoid bending action at the base of a pier,

suspension and anchor cables are fixed to pier top.

27. Power can be expressed as

work/time.

28. Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and

Concurrent.

29. The shape of a suspended cable under its own weight, is

Catenary.

30. The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is

Inertia.

32. Several forces acting simultaneously on a particle of a body

may be replaced by a single force.

33. 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.

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

limiting friction.

35. For perfectly elastic bodies, the value of coefficient of restitution is

1 (one).

36. The force acting on a point on the surface of a rigid body may be considered to act

on any point on the line of action of the force.

37. The apparent weight of a man in a moving lift is less than his real weight when it is going down with

an acceleration.



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