CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III): Questions 138 - 141 of 376

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Question number: 138

» Water » Types of Water Pollution

Appeared in Year: 2015

MCQ▾

Question

If a phosphorous limited lake having surface area equal to 80×106m2 is fed by stream with flow rate 20m3s that has phosphorous concentration of 0.01mgL , then the phosphorous loading from the incoming stream is (June)

Choices

Choice (4) Response

a.

0.2gs

b.

0.6gs

c.

4.0gs

d.

0.4gs

Question number: 139

» Environmental Protection Act » Water ( Prevention and Control of Pollution ) Act, 1974 Amended 1988

Appeared in Year: 2015

MCQ▾

Question

Which act provided provisions for enforcing levy and collection of a tax on water consumed by industries? (June)

Choices

Choice (4) Response

a.

Public Liability Insurance Act 1991

b.

Water (prevention and control of pollution) Act 1974

c.

Water (prevention and control of pollution) Cess Act 1977

d.

Environment (protection) Act 1986

Question number: 140

» Ecosystems » Population

Appeared in Year: 2015

MCQ▾

Question

As the population growth rate increases the doubling time: (June)

Choices

Choice (4) Response

a.

Remain constant

b.

Double

c.

Decrease

d.

Increase

Question number: 141

» Water » Types of Water Pollution

Appeared in Year: 2015

MCQ▾

Question

Filamentous Cyanobacteria differentiate 5 to 10 % of their vegetative cells into heterocysts. Heterocysts are characterized by:

(I) Thick cell wall

(II) Only PSI activity

(III) Nitrogenase activity

Choose the correct answer: (June)

Choices

Choice (4) Response

a.

(I) and (III) only

b.

(II) and (III) only

c.

(I) only

d.

(I), (II) and (III)

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