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Question: Fourier’s law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

Fourier’s law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body) Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

In case of liquids and gases, the heat transfer takes place according to

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning / admin

Question: In case of liquids and gases, the heat transfer takes place according to
[A].

conduction

[B].

convection

[C].

radiation

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

In case of liquids and gases, the heat transfer takes place according to Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

In case of solids, the heat transfer takes place according to radiation.

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning / admin

Question: In case of solids, the heat transfer takes place according to radiation.
[A].

Correct

[B].

Incorrect

Answer: Option B

Explanation:

No answer description available for this question.

In case of solids, the heat transfer takes place according to radiation. Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

Conduction is the process of heat transfer from one particle of the body to another by the actual motion of the heated particles.

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning / admin

Question: Conduction is the process of heat transfer from one particle of the body to another by the actual motion of the heated particles.
[A].

True

[B].

False

Answer: Option B

Explanation:

No answer description available for this question.

Conduction is the process of heat transfer from one particle of the body to another by the actual motion of the heated particles. Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

Conduction is a process of heat transfer

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning / admin

Question: Conduction is a process of heat transfer
[A].

from one particle of the body to another without the actual motion of the particles

[B].

from one particle of the body to another by the actual motion of the heated particles.

[C].

from a hot body to a cold body, in a straight line, without affecting the intervening medium

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Conduction is a process of heat transfer Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

Engineering Mechanics, Mechanical Engineering / admin

Question: According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)
[A].

IP = IG + Ah2

[B].

IP = IG – Ah2

[C].

IP = IG / Ah2

[D].

IP = Ah2 / IG

Answer: Option A

Explanation:

No answer description available for this question.

According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.) Read More »

Engineering Mechanics, Mechanical Engineering

Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.

Engineering Mechanics, Mechanical Engineering / admin

Question: Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.
[A].

nine times

[B].

six times

[C].

four times

[D].

two times

Answer: Option A

Explanation:

No answer description available for this question.

Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base. Read More »

Engineering Mechanics, Mechanical Engineering