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Page 1

Total questions: 71

Worksheet time: 36mins

Name
Class
Date
1.

Engineering Mechanics deals with the behavior of bodies under

a)

Heat and electricity

b)

Force and motion

c)

Chemical reactions

d)

Fluid flow only

2.

A body that does not undergo deformation under force is called

a)

Particle

b)

Fluid body

c)

Rigid body

d)

Elastic body

3.

Statistics deals with bodies

a)

In accelerated motion

b)

At rest or uniform motion

c)

In circular motion

d)

Under variable acceleration

4.

Dynamics is divided into

a)

Statics and kinetics

b)

Kinematics and kinetics

c)

Kinematics and statics

5.

Which quantity does NOT change when a body is taken to space?

a)

Weight

b)

Mass

c)

Acceleration

d)

Velocity

6.

SI unit of force is

a)

Dyne

b)

Joule

c)

Newton

d)

Pascal

7.

One newton is equal to

a)

kg·m/s

b)

kg·m/s^2

c)

kg/s^2

d)

m/s2m/s^2

8.

A particle is defined as an object having

a)

Finite mass and volume

b)

Only volume

9.

Newton’s first law is also known as

a)

Law of acceleration

b)

Law of action and reaction

c)

Law of inertia

d)

Law of gravitation

10.

Which law gives the relation F=maF = ma ?

a)

First law

b)

Second law

c)

Third law

d)

Law of inertia

11.

The force system whose lines of action meet at a point is called

a)

Parallel force system

b)

Collinear force system

c)

Concurrent force system

d)

Coplanar force system

12.

A distributed force acts

a)

At a point

b)

Along a line or area

c)

At the center of mass

d)

Along a diagonal

13.

Stress is defined as

a)

External force

b)

Internal resistance per unit area

c)

Total load

d)

Reaction force

14.

Principle of transmissibility is applicable to

a)

Deformable bodies

b)

Fluid bodies

c)

Rigid bodies

d)

Plastic bodies

15.

Lami’s theorem is applicable when the body is in

a)

Motion

b)

Acceleration

c)

Equilibrium

d)

Rotation

16.

Lami’s theorem applies to how many forces?

a)

Two

b)

Three

c)

Four

d)

Multiple

17.

The angle used in Lami’s theorem is the angle between

a)

A force and horizontal

b)

A force and vertical

c)

The other two forces

d)

The resultant and force

18.

FPS system unit of mass is

a)

Pound

b)

Slug

c)

Newton

d)

Kilogram

19.

Parallelogram law is used to find

a)

Stress

b)

Acceleration

c)

Resultant of two forces

d)

Moment

20.

A rigid body assumption is valid when

a)

Deformation is large

b)

Internal forces dominate

c)

Deformation is negligible

d)

Temperature is high

21.

A body moving with constant velocity is considered under

a)

Dynamics

b)

Kinetics

c)

Statics

d)

Kinematics

22.

Kinematics differs from kinetics because it

a)

Ignores motion

b)

Ignores forces

c)

Ignores acceleration

d)

Ignores mass

23.

A non-coplanar force system means forces

a)

Lie in the same plane

b)

Lie in different planes

c)

Are parallel

d)

Are collinear

24.

The third law of motion states that action and reaction forces are

a)

Equal and same direction

b)

Unequal and opposite

c)

Equal and opposite

d)

Collinear but unequal

25.

Weight of a body depends on

a)

Mass only

b)

Gravitational acceleration

c)

Shape of the body

d)

Volume

26.

A parallel force system can be

a)

Only coplanar

b)

Only non-coplanar

c)

Coplanar or non-coplanar

27.

Internal forces are studied mainly in

a)

Fluid mechanics

b)

Engineering mechanics

c)

Mechanics of solids

d)

Dynamics

28.

The resultant force represents

a)

Maximum force

b)

Average force

c)

Combined effect of forces

d)

Reaction force

29.

Parallelogram law is based on

a)

Newton’s third law

b)

Vector addition

c)

Scalar addition

d)

Energy principle

30.

Concurrent forces may or may not be

a)

Parallel

b)

Collinear

c)

Coplanar

d)

Distributed

31.

Force can change all except

a)

Shape

b)

Direction

c)

Mass

d)

Size

32.

In SI system, force is derived from

a)

Length and mass

b)

Mass and time

c)

Mass, length, and time

d)

Force and mass

33.

Coplanar concurrent forces lie

a)

Along same line

b)

In same plane and meet at a point

c)

In different planes

d)

Parallel to each other

34.

A force is completely specified by

a)

Magnitude only

b)

Direction only

c)

Magnitude, direction, and point of application

d)

Direction and area

35.

The main aim of statics is to study

a)

Motion

b)

Acceleration

c)

Equilibrium

d)

Velocity

36.

Polygon law is useful when

a)

Two forces act

b)

Three or more forces act

c)

Only parallel forces act

d)

Only collinear forces act

37.

Internal stresses arise due to

a)

External loads

b)

Temperature only

c)

Gravity only

d)

Volume

38.

Two forces 10 N and 20 N act at right angles. Resultant is

a)

10 N

b)

20 N

c)

500 N\sqrt{500} \ \text{N}

d)

30 N

39.

If angle between two forces is 0°, resultant equals

a)

Difference

b)

Product

c)

Sum

d)

Zero

40.

Two equal forces act at 120°. Resultant is

a)

Zero

b)

Equal to one force

c)

Twice the force

d)

3\sqrt{3} times force

41.

A force of 50 N acts at 30° to horizontal. Horizontal component is

a)

25 N

b)

43.3 N

c)

50 N

d)

30 N

42.

Vertical component of 100 N at 60° is

a)

50 N

b)

86.6 N

c)

100 N

d)

30 N

43.

Lami’s theorem can be used to find

a)

Velocity

b)

Stress

c)

Unknown forces in equilibrium

44.

In equilibrium, the vector sum of forces is

a)

Maximum

b)

Minimum

c)

Zero

d)

Infinite

45.

A body acted upon by three concurrent forces in equilibrium must satisfy

a)

Triangle law

b)

Polygon law

c)

Parallelogram law

d)

Newton’s second law

46.

If ΣFX=0\Sigma F_X = 0 and ΣFY=0\Sigma F_Y = 0 , the system is

a)

In motion

b)

In acceleration

c)

In equilibrium

d)

Unstable

47.

Two forces of 40 N and 60 N act at 60°. Resultant is closest to

a)

80 N

b)

90 N

48.

A robot arm fails due to incorrect resultant force calculation. This failure is mainly due to violation of

a)

Newton’s first law

b)

Parallelogram law

c)

Stress–strain relation

d)

Law of inertia

49.

If the resultant force shifts during acceleration, which force system is affected most?

a)

Collinear

b)

Concurrent

c)

Parallel

d)

Distributed

50.

In a three-force equilibrium, if one force increases, the system

a)

Remains unchanged

b)

Loses equilibrium

c)

Becomes collinear

d)

Becomes parallel

51.

A concurrent force system becomes non-concurrent when

a)

Forces are equal

b)

Lines of action do not intersect

c)

Forces are parallel

d)

Forces lie in one plane

52.

Parallelogram law fails when

a)

Forces are coplanar

b)

Forces are concurrent

c)

More than two forces act

d)

Forces are inclined

53.

A robotic gripper is held in equilibrium by three cables meeting at a joint. If one cable snaps, equilibrium is lost primarily because

a)

Weight becomes zero

b)

Concurrent force condition is violated

c)

Forces become collinear

d)

Newton’s second law fails

54.

In a crane lifting system, two inclined cables support a load symmetrically. If one cable angle decreases while the load remains constant, the tension in the other cable will

a)

Decrease

b)

Remain unchanged

55.

A coplanar concurrent force system is in equilibrium. If the magnitude of one force is doubled, which condition must be re-established to regain equilibrium?

a)

ΣF≠0\Sigma F \ne 0

b)

ΣF=maximum\Sigma F = \text{maximum}

c)

ΣF=0\Sigma F = 0

d)

ΣM≠0\Sigma M \ne 0

56.

A mobile robot experiences wheel slippage due to improper force balance. This indicates failure in satisfying

a)

Newton’s third law

b)

Force equilibrium conditions

c)

Principle of transmissibility

d)

Law of inertia

57.

A three-force member is in equilibrium. If all forces are not concurrent, the member will

a)

Remain in equilibrium

b)

Rotate

c)

Translate without rotation

d)

Collapse instantly

58.

In a robotic arm joint, forces are applied at different points but along the same line of action. According to mechanics, the effect remains unchanged due to

a)

Lami’s theorem

b)

Polygon law

c)

Principle of transmissibility

d)

Parallelogram law

59.

A load is suspended by three cables such that the angles between them are unequal. Lami’s theorem can still be applied provided the forces are

a)

Parallel

b)

Coplanar and concurrent

c)

Distributed

d)

Collinear

60.

In an AGV (Automated Guided Vehicle), unequal force distribution on wheels causes deviation from straight motion. This occurs due to

a)

Net force not being zero

b)

High inertia

c)

Excess friction

d)

Uniform acceleration

61.

A rigid body under three forces is in equilibrium. If the force polygon does not close, the body will

a)

remain in equilibrium

b)

experience a net resultant force

c)

have all forces collinear

d)

rotate without translation

62.

In a cable-supported platform, if one supporting force acts outside the plane of the other two forces, the system becomes

a)

Coplanar

b)

Concurrent

c)

Non-coplanar

d)

Collinear

63.

A robotic joint is subjected to three forces in equilibrium. If the angle between two forces is increased, the magnitude of the third force must

a)

Increase

b)

Decrease

c)

Remain constant

d)

Become zero

64.

The parallelogram law cannot be applied directly when

a)

Forces are inclined

b)

Forces are concurrent

c)

More than two forces act at a point

65.

A suspended load is supported by two cables making angles of 30° and 60° with the horizontal. The larger tension will occur in the cable making

a)

30°

b)

45°

c)

60°

d)

Equal in both

66.

In equilibrium analysis, replacing a distributed load by a single force at its centroid is valid because

a)

Forces are scalar quantities

b)

Internal stresses are zero

c)

Resultant force remains unchanged

d)

Motion is prevented

67.

A robotic arm remains stationary even when forces act on it. This indicates

a)

Net acceleration is maximum

b)

Net force equals mass

c)

Net force equals zero

d)

Velocity is changing

68.

If two equal forces act at a point but do not produce equilibrium, the angle between them must be

a)

0°

b)

60°

c)

120°

d)

180°

69.

Failure of equilibrium in a lifting mechanism usually results in

a)

Only deformation

b)

Only translation

c)

Rotation and/or translation

d)

No motion

70.

In a three-force system, equilibrium is possible only when the lines of action

a)

Are parallel

b)

Are perpendicular

c)

Intersect at a single point

d)

Are horizontal

71.

A robotic crane designed using incorrect force polygon construction may fail due to

a)

Excess mass

b)

Incorrect vector addition

c)

Material defects

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