Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re0.8 . Prn, is not valid, if the value of

Byadmin August 25, 2022

Question: Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re0.8 . Prn, is not valid, if the value of
[A].

n = 0.4 is used for heating.

[B].

n = 0.3 is used for cooling.

[C].

Reynolds number for the flow involved is > 10000.

[D].

Reynolds number for the flow involved is < 2100.

Answer: Option D

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Environmental Engineering

A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth’s atmosphere, which absorbs it.

Question: A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth’s atmosphere, which absorbs it.
[A].

hydrogen
[B].
carbon dioxide
[C].
ozone
[D].
none of these

Answer: Option C

Explanation:

No answer description available for this question.

Read More A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth’s atmosphere, which absorbs it.
Heat Transfer

All radiations in a black body are___________________?

All radiations in a black body are___________________?

A. reflected
B. refracted
C. transmitted
D. absorbed
E. partly reflected and partly absorbed

Read More All radiations in a black body are___________________?
CHEMICAL ENGINEERING | Fluid Mechanics

Froude number is the ratio of

Question: Froude number is the ratio of
[A].

shear stress to gravitational stress.
[B].
drag stress to shear stress.
[C].
inertial stress to shear stress.
[D].
inertial stress to gravitational stress.

Answer: Option D

Explanation:

No answer description available for this question.

Read More Froude number is the ratio of
CHEMICAL ENGINEERING | Fluid Mechanics

A fluid whose apparent viscosity increases with shear rate is termed as the __________ fluid.

Question: A fluid whose apparent viscosity increases with shear rate is termed as the __________ fluid.
[A].

Newtonion
[B].
viscous
[C].
dilatant
[D].
non-viscous

Answer: Option C

Explanation:

No answer description available for this question.

Read More A fluid whose apparent viscosity increases with shear rate is termed as the __________ fluid.
CHEMICAL ENGINEERING | Heat Transfer

Heat flux is the time rate of heat transfer per unit

Question: Heat flux is the time rate of heat transfer per unit
[A].

length
[B].
area
[C].
volume
[D].
none of these

Answer: Option B

Explanation:

No answer description available for this question.

Read More Heat flux is the time rate of heat transfer per unit
CHEMICAL ENGINEERING | Chemical Engineering Basics

In hot working, dynamic recovery occurs in

Question: In hot working, dynamic recovery occurs in
[A].

metals of low stacking fault energy.
[B].
metals of high stacking fault energy e.g. α-iron.
[C].
single crystal of Ni-based superalloys.
[D].
none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Read More In hot working, dynamic recovery occurs in

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