Mechanical Engineering

Question: An irregular body may have more than one centre of gravity.
[A].

Yes

[B].

No

Answer: Option B

Explanation:

No answer description available for this question.

Question: 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: Option A

Explanation:

No answer description available for this question.

Question: A couple produces
[A].

translatory motion

[B].

rotational motion

[C].

combined translatory and rotational motion

[D].

none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Question: A smooth cylinder lying on a __________ is in neutral equilibrium.
[A].

curved surface

[B].

convex surface

[C].

horizontal surface

Answer: Option C

Explanation:

No answer description available for this question.

Question: A smooth cylinder lying on its convex surface remains in __________ equilibrium.
[A].

stable

[B].

unstable

[C].

neutral

Answer: Option B

Explanation:

No answer description available for this question.

Question: One kg force is equal to
[A].

7.8 N

[B].

8.9 N

[C].

9.8 N

[D].

12 N

Answer: Option C

Explanation:

No answer description available for this question.

Question: If a body is acted upon by a number of coplaner non-concurrent forces, it may
[A].

rotate about itself without moving

[B].

move in any one direction rotating about itself

[C].

be completely at rest

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: For any system of coplaner forces, the condition of equilibrium is that the
[A].

algebraic sum of the horizontal components of all the forces should be zero

[B].

algebraic sum of the vertical components of all the forces should be zero

[C].

algebraic sum of moments of all the forces about any point should be zero

[D].

all of the above

Answer: Option D

Explanation:

No answer description available for this question.

Question: According to the law of moments, if a number of coplaner forces acting on a particle are in equilibrium, then
[A].

their algebraic sum is zero

[B].

their lines of action are at equal distances

[C].

the algebraic sum of their moments about any point in their plane is zero

[D].

the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.

Answer: Option C

Explanation:

No answer description available for this question.

Question: If a number of coplaner forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.
[A].

equal to

[B].

less than

[C].

greater than

Answer: Option A

Explanation:

No answer description available for this question.