CHEMICAL ENGINEERING | Heat Transfer

Dropwise condensation of steam on cooling surface is promoted

Byadmin August 25, 2022

Question: Dropwise condensation of steam on cooling surface is promoted
[A].

an oily surface.

[B].

when both the steam and the tube are clean.

[C].

only in presence of air.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING

Joining of thin foils is preferred to be done by _____________________?

Joining of thin foils is preferred to be done by _____________________?

A. Gamma rays
B. X-rays
C. Microwaves
D. Gas welding

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CHEMICAL ENGINEERING | Fluid Mechanics

In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is

Question: In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is
[A].

0.5
[B].
0.84
[C].
1.84
[D].
1.25

Answer: Option C

Explanation:

No answer description available for this question.

Read More In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is
Heat Transfer

Total heat is the heat required to__________________?

Total heat is the heat required to__________________?

A. change vapour into liquid
B. change liquid into vapour
C. increase the temperature of a liquid or vapour
D. convert water into steam and superheat it
E. convert saturated steam into dry steam

Read More Total heat is the heat required to__________________?
CHEMICAL ENGINEERING | Heat Transfer

If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length

Question: If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
[A].

ha = hl
[B].
ha = 2hl
[C].
ha = 0.5 hl
[D].
ha = 0.75 hl

Answer: Option B

Explanation:

No answer description available for this question.

Read More If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
CHEMICAL ENGINEERING | Chemical Process

Neoprene is the trade name of

Question: Neoprene is the trade name of
[A].

polyurathane
[B].
phenol formaldehyde
[C].
polychloroprene
[D].
styrene-butadiene rubber

Answer: Option C

Explanation:

No answer description available for this question.

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CHEMICAL ENGINEERING | Materials and Construction

Wrought iron is

Question: Wrought iron is
[A].

high carbon iron.
[B].
highly resistance to acid corrosion.
[C].
malleable & ductile; and hence is used for chain links, hooks & couplings.
[D].
an alloy of iron, chromium & carbon.

Answer: Option C

Explanation:

No answer description available for this question.

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