Environmental issues Quiz 4

Question 1

Sound becomes hazardous noise pollution at level

Accepted Answer

above 80 dB

Answer

above 30 dB

Answer

above 100 dB

Answer

above 120 dB

Question 2

When was Water (Prevention and Control of Pollution) Act passed by the Government of India ?

Accepted Answer

1974

Answer

1984

Answer

1986

Answer

1992

Question 3

A mere &hellip;&hellip;&hellip;&hellip;&hellip;&hellip;&hellip; impurities make water contaminated with domestic sewage unfit for human use.

Accepted Answer

0.1%

Answer

0.8%

Answer

0.7%

Answer

0.5%

Question 4

What is the outcome of algal bloom ?

Accepted Answer

Deterioration of water quality and fish mortality.

Answer

Lots of algae available for fodder.

Answer

Cleaning up of the ambient water.

Answer

Decrease in BOD amount.

Question 5

When there are excessive microorganisms in the water that cause biodegradation there is

Accepted Answer

sharp decline of dissolved oxygen content

Answer

sharp rise in the dissolved oxygen content

Answer

refreshing odour to the water

Answer

loss of algal population

Game Settings