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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.

CHEMICAL ENGINEERING, Environmental Engineering /
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.

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. Read More »

CHEMICAL ENGINEERING, Environmental Engineering

Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.

CHEMICAL ENGINEERING, Environmental Engineering /
Question: Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
[A].

20

[B].

60

[C].

90

[D].

120

Answer: Option C

Explanation:

No answer description available for this question.

Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels. Read More »

CHEMICAL ENGINEERING, Environmental Engineering

A man exposed to excessive noise level in the working environment may suffer from

CHEMICAL ENGINEERING, Environmental Engineering /
Question: A man exposed to excessive noise level in the working environment may suffer from
[A].

hearing loss

[B].

rupture of ear drum

[C].

nervousness & fatigue

[D].

all (a), (b) & (c)

Answer: Option D

Explanation:

No answer description available for this question.

A man exposed to excessive noise level in the working environment may suffer from Read More »

CHEMICAL ENGINEERING, Environmental Engineering

Coal mines drainage waste water (acidic in nature) results from the earth’s water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is

CHEMICAL ENGINEERING, Environmental Engineering /
Question: Coal mines drainage waste water (acidic in nature) results from the earth’s water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
[A].

neutralised by alkali treatment.

[B].

left as such without any treatment.

[C].

diluted with fresh water to reduce its acidity.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Coal mines drainage waste water (acidic in nature) results from the earth’s water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is Read More »

CHEMICAL ENGINEERING, Environmental Engineering

Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal

CHEMICAL ENGINEERING, Environmental Engineering /
Question: Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
[A].

by chemical coagulation.

[B].

in sedimentation tanks equipped with mechanical scrapper.

[C].

in vacuum filter.

[D].

in clarifiers.

Answer: Option B

Explanation:

No answer description available for this question.

Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal Read More »

CHEMICAL ENGINEERING, Environmental Engineering

According to this passage, a criminal in a detective story generally gets caught

Comprehension, Verbal Ability /
Question: According to this passage, a criminal in a detective story generally gets caught
[A].

for the crimes he has committed

[B].

because of his careless mistakes

[C].

because the police is smarter than the criminals

[D].

for the crimes he has not committed

Answer: Option D

Explanation:

No answer description available for this question.

According to this passage, a criminal in a detective story generally gets caught Read More »

Comprehension, Verbal Ability

The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

CHEMICAL ENGINEERING, Environmental Engineering /
Question: The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
[A].

decreases.

[B].

increases.

[C].

remains constant.

[D].

may increase or decrease ; depends on the chemical characteristics of polluted water.

Answer: Option A

Explanation:

No answer description available for this question.

The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated. Read More »

CHEMICAL ENGINEERING, Environmental Engineering