Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by whitelisting our website.

Refrigeration and Air Conditioning

The amount of heat flow through a body by conduction is

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: The amount of heat flow through a body by conduction is
[A].

directly proportional to the surface area of the body

[B].

directly proportional to the temperature difference on the two faces of the body

[C].

inversely proportional to the thickness of the body

[D].

all of the above

Answer: Option D

Explanation:

No answer description available for this question.

The amount of heat flow through a body by conduction is Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

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)

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

One of the purposes of sub-cooling the liquid refrigerant is to________________?

Refrigeration and Air Conditioning /
One of the purposes of sub-cooling the liquid refrigerant is to________________?

A. reduce compressor overheating
B. reduce compressor discharge temperature
C. increase cooling effect
D. ensure that only liquid and not the vapour enters the expansion (throttling) valve
E. none of the above

One of the purposes of sub-cooling the liquid refrigerant is to________________? Read More »

Refrigeration and Air Conditioning