CHEMICAL ENGINEERING | Heat Transfer

With increase in temperature, the thermal conductivity of most liquids

Byadmin August 25, 2022

Question: With increase in temperature, the thermal conductivity of most liquids
[A].

increases

[B].

decreases

[C].

remains same

[D].

first increases upto a certain temperature and then becomes constant

Answer: Option B

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Environmental Engineering

Fine grit present in sewage is removed in the __________ during sewage treatment.

Question: Fine grit present in sewage is removed in the __________ during sewage treatment.
[A].

grit chamber
[B].
detritus tank
[C].
trickling filter
[D].
skimming tank.

Answer: Option B

Explanation:

No answer description available for this question.

Read More Fine grit present in sewage is removed in the __________ during sewage treatment.
CHEMICAL ENGINEERING | Heat Transfer

Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer.

Question: Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer.
[A].

Grashoff
[B].
Reynolds
[C].
both ‘a’ & ‘b’
[D].
Prandtl & Grashoff

Answer: Option D

Explanation:

No answer description available for this question.

Read More Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer.
CHEMICAL ENGINEERING | Chemical Reaction Engineering

A pulse tracer is introduced in an ideal CSTR (with a mean residence time ι) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be

Question: A pulse tracer is introduced in an ideal CSTR (with a mean residence time ι) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be
[A].

2τ
[B].
0.5τ
[C].
τ/0.693
[D].
0.693τ

Answer: Option A

Explanation:

No answer description available for this question.

Read More A pulse tracer is introduced in an ideal CSTR (with a mean residence time ι) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be
CHEMICAL ENGINEERING | Chemical Engineering Thermodynamics

For an ideal gas, the activity co-efficient is

Question: For an ideal gas, the activity co-efficient is
[A].

directly proportional to pressure.
[B].
inversely proportional to pressure.
[C].
unity at all pressures.
[D].
none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Read More For an ideal gas, the activity co-efficient is
CHEMICAL ENGINEERING | Mass Transfer

It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).

Question: It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).
[A].

15 min
[B].
51 min
[C].
71 min
[D].
94 min

Answer: Option C

Explanation:

No answer description available for this question.

Read More It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).
CHEMICAL ENGINEERING | Chemical Process

Bromine is used in the preparation of

Question: Bromine is used in the preparation of
[A].

fire extinguishing compounds.
[B].
fire proofing agents.
[C].
dyes and antiknock compounds.
[D].
all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Read More Bromine is used in the preparation of

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