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Environmental Engineering

Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels.

Question: Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels.
[A].

35

[B].

75

[C].

95

[D].

105

Answer: Option B

Explanation:

No answer description available for this question.

Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. Read More »

CHEMICAL ENGINEERING, Environmental Engineering

Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is

Question: Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is
[A].

inversely proportional to viscosity of gas.

[B].

proportional to the viscosity & density of the gas.

[C].

proportional to the pressure of the gas.

[D].

both (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is Read More »

CHEMICAL ENGINEERING, Environmental Engineering

Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the

Question: Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the
[A].

forestation

[B].

rain

[C].

green house effect

[D].

vegetation

Answer: Option C

Explanation:

No answer description available for this question.

Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the Read More »

CHEMICAL ENGINEERING, Environmental Engineering

Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for

Question: Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for
[A].

conversion of CO into CO2 in the second compartment.

[B].

conversion of NOx into N2 and NH3 in the first compartment.

[C].

oxidation of unburnt hydrocarbon fuel in the second compartment.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for Read More »

CHEMICAL ENGINEERING, Environmental Engineering

Workers working in __________ industry are most prone to white lung cancer.

Question: Workers working in __________ industry are most prone to white lung cancer.
[A].

coal mining

[B].

limestone mining

[C].

textile

[D].

asbestos

Answer: Option C

Explanation:

No answer description available for this question.

Workers working in __________ industry are most prone to white lung cancer. Read More »

CHEMICAL ENGINEERING, Environmental Engineering

The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).

Question: The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).
[A].

20

[B].

230

[C].

750

[D].

1500

Answer: Option B

Explanation:

No answer description available for this question.

The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU). Read More »

CHEMICAL ENGINEERING, Environmental Engineering

Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as

Question: Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as
[A].

photochemical smog.

[B].

peroxy acetyl nitrate (PAN) or methyl nitrile.

[C].

benzopyrene.

[D].

poly acrylonitrile

Answer: Option B

Explanation:

No answer description available for this question.

Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as Read More »

CHEMICAL ENGINEERING, Environmental Engineering

In large thermal power stations very fine particulates present in flue gas are removed by

Question: In large thermal power stations very fine particulates present in flue gas are removed by
[A].

wet scrubber

[B].

bag filter

[C].

electrostatic precipitators

[D].

dust catcher

Answer: Option C

Explanation:

No answer description available for this question.

In large thermal power stations very fine particulates present in flue gas are removed by Read More »

CHEMICAL ENGINEERING, Environmental Engineering