08 JUNE 2021 | NDA EXAM 2021 QUESTIONS

1) Question

Consider the following statements. Furnace oil

1) refers to the Heaviest commercial fuel that can be obtained from crude oil

2) is used as a feed stock for fertiliser manufacturing

Which of the above is/are correct?

1 only

2 only

Both 1 and 2

None

2) Question

Nitrogen dioxide in excess in air is harmful to

1) Photosynthesis in plants

2) Textile fibres

3) Children due to risk of acute respiratory diseases

Select the correct answer using the codes below.

1 only

2 and 3 only

1 and 3 only

1, 2 and 3

3) Question

What is/are the differences between a primary pollutant and a secondary pollutant?

1) A primary pollutant is an air pollutant emitted directly from a source unlike a secondary pollutant.

2) A primary pollutant has a much shorter life in the atmosphere than a secondary pollutant.

3) A primary pollutant is characterized as less potent or harmful than a secondary pollutant.

Select the correct answer using the codes below.

1 only

1 and 2 only

2 and 3 only

1 and 3 only

4) Question

Burning coal generates fly ash which contains several toxic pollutants. These include

1) Lead

2) Zinc

3) Arsenic

4) Plutonium

5) Cadmium

Select the correct answer using the codes below.

1, 2, 3 and 5 only

2, 3 and 5 only

1, 4 and 5 only

1, 2 and 3 only

5) Question

Land Degradation Neutrality (LDN) has been defined by the Parties to the UNCCD as

Zero land degradation due to anthropogenic factors in a nation or a pre-defined ecosystem

A state whereby the amount and quality of land resources, necessary to support ecosystem functions and services remains stable or increases with time

Control over the factors that cause large scale degradation with a reasonable leeway for degradation that are beyond human intervention

The state when the amount of land degraded is compensated by afforestation ensuring that the net carbon sink remains the same