Environmental Biotechnology MCQs

Question 1

Aquatic microorganisms, in general can be grown at pH

Accepted Answer

6.5 to 8.5

Answer

3.5 to 9.0

Answer

2.5 to 5.7

Answer

5.0 to 7.5

Question 2

Sedimentation is enhanced by the addition of

Accepted Answer

Alum aluminium sulphate

Answer

Sodium chloride

Answer

Ethylene

Answer

Benzene

Question 3

Biogas production is the outcome of

Accepted Answer

Methanogenesis and gasification

Answer

Methanogenesis

Answer

Pyrolysis

Answer

Gasification

Question 4

The spatial scale of meso-scale meteorological phenomenon is approximately

Accepted Answer

Few 100 m to few km

Answer

2 - 3 krn to 5 - 6 km

Answer

Few km to 100 km

Answer

10 mm to 1 km

Question 5

Polychlorinated biphenyls (PCBs) which cause environmental exposure risk have these important properties

Accepted Answer

Highly soluble in water and poorly soluble in oils and organic solvents

Answer

Very high volatility in air

Answer

Chemically unstable and highly reactive

Answer

Heat stable and have no flash or fire point

Question 6

DOM and POM are stands for

Accepted Answer

Dissolved organic matter and particulate organic matter

Answer

Dissolved oxygen matter and particulate organic matter

Answer

Double organic matter and particular organic matter

Answer

Decrease organic matter and percentage organic matter

Question 7

Any particulate matter, gas, or combination thereof other than water vapour is called

Accepted Answer

Air emission

Answer

Air curtain

Answer

Air monitoring

Answer

Air contaminant

Question 8

Deep-sea ferromanganese nodules are found on

Accepted Answer

Oceanic ridges

Answer

Oceanic plateau

Answer

Oceanic islands

Answer

Oceanic plains

Question 9

In ocean regime carbonate compensation depth (CCD) implies

Accepted Answer

Precipitation of carbonate

Answer

Dissolution of carbonate

Answer

Evaporation of carbonate

Answer

Sublimation of carbonate