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Question (41)

QN0037711

According to the chapter, discharging 1 litre of industrial wastewater can pollute how much freshwater?

(A) 2 litres
(B) 4 litres
(C) 6 litres
(D) 8 litres

Correct Answer: D

Explanation:

The chapter states that every litre of industrial wastewater discharged pollutes eight times that quantity of freshwater.

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Question (42)

QN0037712

If 2,500 litres of industrial wastewater are discharged, how much freshwater could be polluted according to the chapter's stated ratio?

(A) 10,000 litres
(B) 12,500 litres
(C) 15,000 litres
(D) 20,000 litres

Correct Answer: D

Explanation:

2,500 × 8 = 20,000 litres of freshwater.

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Question (43)

QN0037713

A factory releases hot water directly into a river without cooling it first. Which type of pollution is most directly caused?

(A) Noise pollution
(B) Thermal pollution
(C) Land pollution
(D) Air pollution

Correct Answer: B

Explanation:

Discharge of hot water into water bodies causes thermal pollution.

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Question (44)

QN0037714

Which combination represents methods of reducing particulate matter from industrial emissions?

(A) Electrostatic precipitators, fabric filters and scrubbers
(B) Rainwater harvesting and afforestation only
(C) Earplugs and silencers only
(D) Sedimentation and biological treatment only

Correct Answer: A

Explanation:

Electrostatic precipitators, fabric filters and scrubbers are used to control particulate emissions.

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Question (45)

QN0037715

An industry uses wastewater again in two successive stages before releasing the treated water. This practice mainly helps to:

(A) increase freshwater consumption
(B) reduce water use and pollution
(C) increase solid waste
(D) increase noise pollution

Correct Answer: B

Explanation:

Reuse and recycling of wastewater reduce freshwater consumption and the quantity of wastewater discharged.

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Question (46)

QN0037716

A factory wants to treat its wastewater using screening, grinding, flocculation and sedimentation. These processes belong to:

(A) primary mechanical treatment
(B) secondary biological treatment
(C) tertiary treatment only
(D) thermal treatment

Correct Answer: A

Explanation:

Screening, grinding, flocculation and sedimentation are part of primary mechanical treatment.

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Question (47)

QN0037717

An industrial unit reduces its particulate emissions by 25% from an initial level of 1,200 units. What is the new emission level?

(A) 900 units
(B) 950 units
(C) 1,000 units
(D) 1,100 units

Correct Answer: A

Explanation:

Reduction = 25% of 1,200 = 300. New level = 1,200 − 300 = 900 units.

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Question (48)

QN0037718

A factory replaces coal with oil or gas to reduce smoke emissions. This measure primarily targets:

(A) air pollution
(B) water pollution
(C) land pollution
(D) noise pollution

Correct Answer: A

Explanation:

Using oil or gas instead of coal can reduce smoke and particulate emissions, thereby reducing air pollution.

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Question (49)

QN0037719

Which measure is most directly related to controlling industrial noise?

(A) Installing rainwater harvesting systems
(B) Fitting silencers on generators
(C) Treating wastewater biologically
(D) Recycling fly ash

Correct Answer: B

Explanation:

Silencers on generators help reduce industrial noise.

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Question (50)

QN0037720

NTPC's environmental management approach includes:

(A) increasing waste generation
(B) resource conservation, waste minimisation and environmental monitoring
(C) eliminating all industrial production
(D) depending only on imported technology

Correct Answer: B

Explanation:

The chapter highlights NTPC's ISO 14001 environmental management system, resource conservation, waste minimisation and environmental monitoring.

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Question (41)

According to the chapter, discharging 1 litre of industrial wastewater can pollute how much freshwater?

Explanation:

Link:

Question (42)

If 2,500 litres of industrial wastewater are discharged, how much freshwater could be polluted according to the chapter's stated ratio?

Explanation:

Link:

Question (43)

A factory releases hot water directly into a river without cooling it first. Which type of pollution is most directly caused?

Explanation:

Link:

Question (44)

Which combination represents methods of reducing particulate matter from industrial emissions?

Explanation:

Link:

Question (45)

An industry uses wastewater again in two successive stages before releasing the treated water. This practice mainly helps to:

Explanation:

Link:

Question (46)

A factory wants to treat its wastewater using screening, grinding, flocculation and sedimentation. These processes belong to:

Explanation:

Link:

Question (47)

An industrial unit reduces its particulate emissions by 25% from an initial level of 1,200 units. What is the new emission level?

Explanation:

Link:

Question (48)

A factory replaces coal with oil or gas to reduce smoke emissions. This measure primarily targets:

Explanation:

Link:

Question (49)

Which measure is most directly related to controlling industrial noise?

Explanation:

Link:

Question (50)

NTPC's environmental management approach includes:

Explanation:

Link:

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