CHEMICAL ENGINEERING | Heat Transfer

While the total emissivity of a perfect black body is unity, the same for a real body is

Byadmin August 25, 2022

Question: While the total emissivity of a perfect black body is unity, the same for a real body is
[A].

[B].

[C].

> 1

[D].

between 0 and 1

Answer: Option D

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Mass Transfer

Overall efficiency of the distillation column is

Question: Overall efficiency of the distillation column is
[A].

the ratio of number of ideal plates to actual plates.
[B].
the ratio of number of actual plates to ideal plates.
[C].
same as the Murphree efficiency.
[D].
always more than the point efficiency.

Answer: Option A

Explanation:

No answer description available for this question.

Read More Overall efficiency of the distillation column is
CHEMICAL ENGINEERING | Fluid Mechanics

In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency.

Question: In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency.
[A].

manometric
[B].
mechanical
[C].
volumetric
[D].
overall

Answer: Option A

Explanation:

No answer description available for this question.

Read More In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency.
CHEMICAL ENGINEERING | Environmental Engineering

Ionisation potential employed in the industrial electrostatic precipitator is of the order of

Question: Ionisation potential employed in the industrial electrostatic precipitator is of the order of
[A].

30 to 70 kV DC
[B].
30 to 70 kV AC
[C].
230 V AC
[D].
230 V DC

Answer: Option A

Explanation:

No answer description available for this question.

Read More Ionisation potential employed in the industrial electrostatic precipitator is of the order of
CHEMICAL ENGINEERING | Chemical Reaction Engineering

For a zero order chemical reaction, the

Question: For a zero order chemical reaction, the
[A].

half life period is directly proportion to the initial concentration of the reac-tants.
[B].
plot of products concentration with time is a straight line through the origin.
[C].
products concentration increases linerarly with time.
[D].
all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Read More For a zero order chemical reaction, the
CHEMICAL ENGINEERING | Chemical Engineering Thermodynamics

In an ideal solution, the activity of a component equals its

Question: In an ideal solution, the activity of a component equals its
[A].

mole fraction.
[B].
fugacity at the same temperature and pressure.
[C].
partial pressure.
[D].
none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Read More In an ideal solution, the activity of a component equals its
CHEMICAL ENGINEERING | Mass Transfer

Dimension of mass diffusivity is the same as that of

Question: Dimension of mass diffusivity is the same as that of
[A].

kinematic viscosity
[B].
dynamic viscosity
[C].
surface tension
[D].
pressure

Answer: Option A

Explanation:

No answer description available for this question.

Read More Dimension of mass diffusivity is the same as that of

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