CHEMICAL ENGINEERING | Heat Transfer

In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)

Byadmin August 25, 2022

Question: In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)
[A].

α = 1; ε ≠ 1

[B].

α ≠ 1, ε = 1

[C].

α ≠ 1, ε ≠ 1

[D].

α = 1; ε = 1

Answer: Option D

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Heat Transfer

With increase in temperature, the thermal conductivity of a gas

Question: With increase in temperature, the thermal conductivity of a gas
[A].

increases.
[B].
decreases.
[C].
remains same.
[D].
may increase or decrease depending on the type of gas.

Answer: Option A

Explanation:

No answer description available for this question.

Read More With increase in temperature, the thermal conductivity of a gas
CHEMICAL ENGINEERING | Fuels and Combustion

With increase in the temperature of carbonisation of coal

Question: With increase in the temperature of carbonisation of coal
[A].

hydrogen content of coke oven gas increases due to cracking of hydrocarbons.
[B].
methane content in the coke oven gas decreases and carbon monoxide content increases.
[C].
calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H2 content.
[D].
all (a), (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Read More With increase in the temperature of carbonisation of coal
CHEMICAL ENGINEERING | Fuels and Combustion

L.D. converter gas (produced in steel plant) comprises mainly of

Question: L.D. converter gas (produced in steel plant) comprises mainly of
[A].

CO (upto 65%) & CO2
[B].
CO2 & H2
[C].
CO & O2
[D].
CO2 & O2

Answer: Option A

Explanation:

No answer description available for this question.

Read More L.D. converter gas (produced in steel plant) comprises mainly of
CHEMICAL ENGINEERING

Normalising does not ______________________ of a metal ?

Normalising does not ______________________ of a metal ?

A. Improve machinability & tensile strength
B. Remove internal stresses
C. Refine the structure
D. Remove strains caused by cold working

Read More Normalising does not ______________________ of a metal ?
CHEMICAL ENGINEERING | Fluid Mechanics

For laminar flow of a fluid through a packed bed of spheres of diameter d, the pressure drop per unit length of bed depends upon the sphere diameter as

Question: For laminar flow of a fluid through a packed bed of spheres of diameter d, the pressure drop per unit length of bed depends upon the sphere diameter as
[A].

d
[B].
d2
[C].
d4
[D].

Answer: Option D

Explanation:

No answer description available for this question.

Read More For laminar flow of a fluid through a packed bed of spheres of diameter d, the pressure drop per unit length of bed depends upon the sphere diameter as
CHEMICAL ENGINEERING | Chemical Process

At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

Question: At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
[A].

independent of
[B].
directly proportional to
[C].
inversely proportional to
[D].
proportional to the square of

Answer: Option A

Explanation:

No answer description available for this question.

Read More At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

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