Chemical Engineering

Industrial workers working in leather tanning & manufacturing units are prone to suffer from

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Question: Industrial workers working in leather tanning & manufacturing units are prone to suffer from
[A].

respirtory ailments (e.g. bronchitis).

[B].

skin diseases (e.g. dermatities).

[C].

silicosis.

[D].

blurred vision.

Answer: Option B

Explanation:

No answer description available for this question.

From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.

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Question: From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.
[A].

1

[B].

5

[C].

50

[D].

500

Answer: Option B

Explanation:

No answer description available for this question.

Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to

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Question: Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to
[A].

Reynold stresses

[B].

shear forces

[C].

both (a) & (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan

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Question: Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
[A].

with greater number of blades.

[B].

of increased diameter.

[C].

both (a) & (b).

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.

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Question: Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.
[A].

3

[B].

30

[C].

70

[D].

100

Answer: Option A

Explanation:

No answer description available for this question.