Mechanical Engineering

Question: Moment of inertia of a hollow rectangular section as shown in the below figure about Y-Y axis, is not the same as that about X-X axis.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: Moment of inertia of a hollow rectangular section as shown in the below figure about X-X axis, is
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

Question: Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

Question: Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the width (b), is
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.

Question: Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its mid-point
[A].

same as

[B].

twice

[C].

thrice

[D].

four times

Answer: Option D

Explanation:

No answer description available for this question.

Question: 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].

[B].

[C].

[D].

Answer: Option D

Explanation:

No answer description available for this question.

Question: The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as
[A].

principle of independence of forces

[B].

principle of resolution of forces

[C].

principle of transmissibility of forces

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: A spherical body is symmetrical about its perpendicular axis. According to Routh’s rule, the moment of inertia of a body about an axis passing through its centre of gravity is(where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)
[A].

MS/3

[B].

MS/4

[C].

MS/5

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Moment of inertia is the
[A].

second moment of force

[B].

second moment of area

[C].

second moment of mass

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. The centre of gravity of the section will lie
[A].

in the shaded area

[B].

in the hole

[C].

at O

Answer: Option A

Explanation:

No answer description available for this question.