4791 + Mcqs in Mechanical Engineering McqOptions

1.	If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is __________ the momentum of body having mass m2.
A.	equal to
B.	less than
C.	greater than
Answer» D.

Discussion

2.	The angle between two forces when the resultant is maximum and minimum respectively are
A.	0 and 180
B.	180 and 0
C.	90 and 180
D.	90 and 0
Answer» B. 180 and 0

Discussion

3.	The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is
A.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/46-264-1.png">
B.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/46-264-2.png">
C.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/46-264-3.png">
D.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/46-264-4.png">
Answer» C. <img src="/_files/images/mechanical-engineering/engineering-mechanics/46-264-3.png">

Discussion

4.	The path of the projectile is a parabola.
A.	True
B.	False
Answer» B. False

Discussion

5.	A redundant frame is also called __________ frame.
A.	perfect
B.	imperfect
C.	deficient
Answer» C. deficient

Discussion

6.	Mass moment of inertia of a uni form thin rod of mass M and length (l) about its mid-point and perpendicular to its length is
A.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/31-85-1.png">
B.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/31-85-2.png">
C.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/31-85-3.png">
D.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/31-85-4u.png">
Answer» E.

Discussion

7.	A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.
A.	True
B.	False
Answer» B. False

Discussion

8.	When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
A.	simple pendulum
B.	compound pendulum
C.	torsional pendulum
D.	second's pendulum
Answer» C. torsional pendulum

Discussion

9.	Moment of inertia of a hollow circular section, as shown in the below figure about X-axis, is
A.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/32-97-2.png">
B.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/32-97-3.png">
C.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/32-97-4.png">
D.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/32-97-5.png">
Answer» E.

Discussion

10.	If two blocks of equal mass are attached to the two ends of a light string and one of the blocks is placed over a smooth horizontal plane while the other is hung freely after passing over a smooth pulley, then the two blocks will have some motion.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

11.	The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as
A.	static friction
B.	dynamic friction
C.	limiting friction
D.	coefficient of friction
Answer» D. coefficient of friction

Discussion

12.	During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.
A.	equal to
B.	equal and opposite to
C.	less than
D.	greater than
Answer» C. less than

Discussion

13.	The distance, between the point of projection and the point where the projectile strikes the ground, is known as range.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

14.	The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.
A.	equal to
B.	less than
C.	greater than
Answer» B. less than

Discussion

15.	In the shown figure, if the angle of inclination of the plane is increased, then acceleration of the system will
A.	increase
B.	decrease
C.	remain the same
Answer» C. remain the same

Discussion

16.	The total time taken by a projectile to reach maximum height and to return back to the ground, is known as time of flight.
A.	Yes
B.	No
Answer» B. No

Discussion

17.	The range of a projectile is maximum, when the angle of projection is
A.	30
B.	45
C.	60
D.	90
Answer» C. 60

Discussion

18.	A smooth cylinder lying on its convex surface remains in __________ equilibrium.
A.	stable
B.	unstable
C.	neutral
Answer» C. neutral

Discussion

19.	The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, = Angle of projection, and = Inclination of the plane with the horizontal.)
A.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/43-223-1.png">
B.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/43-223-2.png">
C.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/43-223-3.png">
D.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/43-223-4.png">
Answer» C. <img src="/_files/images/mechanical-engineering/engineering-mechanics/43-223-3.png">

Discussion

20.	The velocity ratio in case of an inclined plane inclined at angle to the horizontal and weight being pulled up the inclined plane by vertical effort is
A.	sin
B.	cos
C.	tan
D.	cosec
Answer» B. cos

Discussion

21.	The range of projectile on a downward inclined plane is __________ the range on upward inclined plane for the same velocity of projection and angle of projection.
A.	less than
B.	more than
C.	equal to
Answer» C. equal to

Discussion

22.	The angle of inclination of a vehicle when moving along a circular path __________ upon its mass.
A.	depends
B.	does not depend
Answer» C.

Discussion

23.	If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
A.	30
B.	60
C.	90
D.	120
Answer» E.

Discussion

24.	The weight per unit volume of a liquid at a standard temperature and pressure is called
A.	specific weight
B.	mass density
C.	specific gravity
D.	none of these
Answer» B. mass density

Discussion

25.	The centre of buoyancy is the centre of area of the immersed body.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

26.	The metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.
A.	The bodies A and B have equal stability
B.	The body A is more stable than body B
C.	The body B is more stable than body A
D.	The bodies A and B are unstable
Answer» D. The bodies A and B are unstable

Discussion

27.	In open channels, the specific energy is the
A.	total energy per unit discharge
B.	total energy measured with respect to the datum passing through the bottom of the channel
C.	total energy measured above the horizontal datum
D.	kinetic energy plotted above the free surface of water
Answer» C. total energy measured above the horizontal datum

Discussion

28.	The Bernoulli's equation is based on the assumption that
A.	there is no loss of energy of the liquid flowing
B.	the velocity of flow is uniform across any cross-section of the pipe
C.	no force except gravity acts on the fluid
D.	all of the above
Answer» E.

Discussion

29.	If a number of forces are acting at a point, theirresultant will be inclined at an angle with the horizontal, such that
A.	tan = H/ V
B.	tan = V/ H
C.	tan = Vx H
D.	<img src="/_files/images/mechanical-engineering/engineering-mechanics/4-23-1.png">
Answer» C. tan = Vx H

Discussion

30.	If the masses of both the bodies, as shown in the below figure, are reduced to 50 percent, then tension in the string will be
A.	same
B.	half
C.	double
Answer» C. double

Discussion

31.	The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in magnitude and direction by the third side of a triangle, taken in opposite order.
A.	True
B.	False
Answer» B. False

Discussion

32.	Static friction is always __________ dynamic friction.
A.	equal to
B.	less than
C.	greater than
Answer» D.

Discussion

33.	When a particle moves along a circular path with uniform velocity, there will be no tangential acceleration.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

34.	A body will begin to move down an inclined plane if the angle of inclination of the plane is __________ the angle of friction.
A.	equal to
B.	less than
C.	greater than
Answer» D.

Discussion

35.	The bodies which rebound after impact are called
A.	inelastic bodies
B.	elastic bodies
C.	neither elastic nor inelastic bodies
D.	none of these
Answer» C. neither elastic nor inelastic bodies

Discussion

36.	In A-B-C analysis, which class of items are generally large in number?
A.	A
B.	B
C.	C
D.	none of these
Answer» D. none of these

Discussion

37.	The mechanical advantage of a lifting machine is the ratio of
A.	distance moved by effort to the distance moved by load
B.	load lifted to the effort applied
C.	output to the input
D.	all of the above
Answer» C. output to the input

Discussion

38.	In order to avoid excessive multiplication of facilities, the layout preferred is
A.	product layout
B.	process layout
C.	group layout
D.	static layout
Answer» C. group layout

Discussion

39.	The determination of standard time in a complex job system is best done through
A.	stop watch time study
B.	analysis of micromotions
C.	grouping timing technique
D.	analysis of standard data system
Answer» E.

Discussion

40.	In CPM, the cost slope is determined by
A.	<img src="/_files/images/mechanical-engineering/industrial-engineering-and-production-management/742-78-1.png">
B.	<img src="/_files/images/mechanical-engineering/industrial-engineering-and-production-management/742-78-2.png">
C.	<img src="/_files/images/mechanical-engineering/industrial-engineering-and-production-management/742-78-3.png">
D.	<img src="/_files/images/mechanical-engineering/industrial-engineering-and-production-management/742-78-4.png">
Answer» C. <img src="/_files/images/mechanical-engineering/industrial-engineering-and-production-management/742-78-3.png">

Discussion

41.	In a line organisation
A.	responsibility of each individual is fixed
B.	discipline is strong
C.	quick decisions are taken
D.	all of these
Answer» E.

Discussion

42.	Which of the following are the guidelines for the construction of a network diagram?
A.	Each activity is represented by one and only one arrow in the network.
B.	Dangling must be avoided in a network diagram.
C.	Dummy activity consumes no time or resource.
D.	all of the above
Answer» E.

Discussion

43.	Queuing theory is associated with
A.	inventory
B.	sales
C.	waiting time
D.	production time
Answer» D. production time

Discussion

44.	The friction experienced by a body, when in motion, is known as
A.	rolling friction
B.	dynamic friction
C.	limiting friction
D.	static friction
Answer» C. limiting friction

Discussion

45.	The coefficient of restitution for elastic bodies is one.
A.	Correct
B.	Incorrect
Answer» C.

Discussion

46.	The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

47.	The flow through a nozzle is regarded as
A.	constant volume flow
B.	constant pressure flow
C.	isothermal flow
D.	isentropic flow
Answer» E.

Discussion

48.	According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.
A.	True
B.	False
Answer» C.

Discussion

49.	The aim of value engineering is to
A.	find the depreciation value of a machine
B.	determine the selling price of a product
C.	minimise the cost without change in quality of the product
D.	all of the above
Answer» D. all of the above

Discussion

50.	Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.
A.	diameter
B.	square of diameter
C.	cube of diameter
D.	fourth power of diameter
Answer» E.

Discussion

Explore topic-wise MCQs in Testing Subject.

If two bodies having masses m1 and m2 (m1&gt;m2) have equal kinetic energies, the momentum of body having mass m1 is __________ the momentum of body having mass m2.

The angle between two forces when the resultant is maximum and minimum respectively are

The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is

The path of the projectile is a parabola.

A redundant frame is also called __________ frame.

Mass moment of inertia of a uni form thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.

When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as

Moment of inertia of a hollow circular section, as shown in the below figure about X-axis, is

If two blocks of equal mass are attached to the two ends of a light string and one of the blocks is placed over a smooth horizontal plane while the other is hung freely after passing over a smooth pulley, then the two blocks will have some motion.

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

During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.

The distance, between the point of projection and the point where the projectile strikes the ground, is known as range.

The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.

In the shown figure, if the angle of inclination of the plane is increased, then acceleration of the system will

The total time taken by a projectile to reach maximum height and to return back to the ground, is known as time of flight.

The range of a projectile is maximum, when the angle of projection is

A smooth cylinder lying on its convex surface remains in __________ equilibrium.

The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, = Angle of projection, and = Inclination of the plane with the horizontal.)

The velocity ratio in case of an inclined plane inclined at angle to the horizontal and weight being pulled up the inclined plane by vertical effort is

The range of projectile on a downward inclined plane is __________ the range on upward inclined plane for the same velocity of projection and angle of projection.

The angle of inclination of a vehicle when moving along a circular path __________ upon its mass.

If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

The weight per unit volume of a liquid at a standard temperature and pressure is called

The centre of buoyancy is the centre of area of the immersed body.

The metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.

In open channels, the specific energy is the

The Bernoulli's equation is based on the assumption that

If a number of forces are acting at a point, theirresultant will be inclined at an angle with the horizontal, such that

If the masses of both the bodies, as shown in the below figure, are reduced to 50 percent, then tension in the string will be

Static friction is always __________ dynamic friction.

When a particle moves along a circular path with uniform velocity, there will be no tangential acceleration.

A body will begin to move down an inclined plane if the angle of inclination of the plane is __________ the angle of friction.

The bodies which rebound after impact are called

In A-B-C analysis, which class of items are generally large in number?

The mechanical advantage of a lifting machine is the ratio of

In order to avoid excessive multiplication of facilities, the layout preferred is

The determination of standard time in a complex job system is best done through

In CPM, the cost slope is determined by

In a line organisation

Which of the following are the guidelines for the construction of a network diagram?

Queuing theory is associated with

The friction experienced by a body, when in motion, is known as

The coefficient of restitution for elastic bodies is one.

The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.

The flow through a nozzle is regarded as

According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.

The aim of value engineering is to

Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.

If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is __________ the momentum of body having mass m2.