The insulation ability of an insulator with the presence of moisture would_________________?

Byadmin January 24, 2019August 16, 2021

The insulation ability of an insulator with the presence of moisture would_________________?

A. increase
B. decrease
C. remain unaffected
D. may increase/decrease depending on temperature and thickness of insulation
E. none of the above

CHEMICAL ENGINEERING | Heat Transfer

Convective heat transfer, in which heat is transferred by movement of warmed matter is described by

Question: Convective heat transfer, in which heat is transferred by movement of warmed matter is described by
[A].

Fourier’s law
[B].
Newton’s law of cooling
[C].
Fick’s law
[D].
none of these

Answer: Option B

Explanation:

No answer description available for this question.

Read More Convective heat transfer, in which heat is transferred by movement of warmed matter is described by
Heat Transfer

A non-dimensional number generally associated with natural convection heat transfer is________________?

A non-dimensional number generally associated with natural convection heat transfer is________________?

A. Grashoff number
B. Nusselt number
C. Weber number
D. Prandtl number
E. Reynold number

Read More A non-dimensional number generally associated with natural convection heat transfer is________________?
CHEMICAL ENGINEERING | Heat Transfer

Loss of heat from untagged steam pipe to the ambient air is by

Question: Loss of heat from untagged steam pipe to the ambient air is by
[A].

conduction
[B].
convection
[C].
radiation
[D].
all (a), (b) & (c)

Answer: Option D

Explanation:

No answer description available for this question.

Read More Loss of heat from untagged steam pipe to the ambient air is by
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The by-pass factor of the heating coil is

Question: The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The by-pass factor of the heating coil is
[A].

0.376
[B].
0.4
[C].
0.6
[D].
0.67

Answer: Option C

Explanation:

No answer description available for this question.

Read More The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The by-pass factor of the heating coil is
Heat Transfer

Emissivity of a white polished body in comparison to a black body is________________?

Emissivity of a white polished body in comparison to a black body is________________?

A. higher
B. lower
C. same
D. depends upon the shape of body
E. none of the above

Read More Emissivity of a white polished body in comparison to a black body is________________?
CHEMICAL ENGINEERING | Heat Transfer

Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the __________ of pure water.

Question: Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the __________ of pure water.
[A].

boiling point
[B].
dynamic viscosity
[C].
kinematic viscosity
[D].
density

Answer: Option A

Explanation:

No answer description available for this question.

Read More Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the __________ of pure water.

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