ENVIRONMENTAL ENGINEERING IN CE QUIZ

Carbonaceous particles having size less than 1 μm are called

Aerosols

Grit

Smoke

Aggregates

TRUE ANSWER : ?
YOUR ANSWER : ?

Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes

Undesirable plant growth

Odour nuisances

Foaming

Turbidity

TRUE ANSWER : ?
YOUR ANSWER : ?

Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.

95

120

75

140

TRUE ANSWER : ?
YOUR ANSWER : ?

The principal gas evolved from sludge digestion tank is

CH₄

CO₂

N₂

CO

TRUE ANSWER : ?
YOUR ANSWER : ?

'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

Photochemical reaction in polluted atmosphere

Burning of domestic fuel

Automobiles exhaust

Industrial chimney exhaust

TRUE ANSWER : ?
YOUR ANSWER : ?

Fine grit present in sewage is removed in the __________ during sewage treatment.

Trickling filter

Skimming tank

Detritus tank

Grit chamber

TRUE ANSWER : ?
YOUR ANSWER : ?

Green house effect is accentuated by

Increased transportation activity

All of these

Rapid industrialisation

Deforestation

TRUE ANSWER : ?
YOUR ANSWER : ?

In large thermal power stations very fine particulates present in flue gas are removed by

Dust catcher

Electrostatic precipitators

Bag filter

Wet scrubber

TRUE ANSWER : ?
YOUR ANSWER : ?

White smoke coming out of the chimney of a furnace indicates the use of

Low excess air

Gaseous fuel in the furnace

Very high excess air

Liquid fuel in the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

What are the methods of treatment & disposal of radioactive wastes?

Biological methods & adsorption in ion exchange materials

Evaporation & chemical precipitation

Fixing into a solid mass with cement and sinking deep in the sea

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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