ENVIRONMENTAL ENGINEERING IN CE QUIZ

80% less than 200 mesh size particles are called

Aggregates

Grit

Powder

Smoke

TRUE ANSWER : ?
YOUR ANSWER : ?

Noise level in a quiet private business office is about __________ decibels.

50

85

25

70

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following acts as a natural source of air pollution?

None of these

Deforestation

Forest fire

Volcanic eruption

TRUE ANSWER : ?
YOUR ANSWER : ?

Smog is not formed due to the presence of __________ in the atmosphere.

NOx

Any of these

CO₂

SO₂

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum CO₂ is emitted into the atmosphere by

Urea

Biomass burning

Trees

Combustion

TRUE ANSWER : ?
YOUR ANSWER : ?

When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell.

0.01

4

0.1

1

TRUE ANSWER : ?
YOUR ANSWER : ?

Reinglemann chart is used for the measurement of the

Exhaust gas density

Smoke density from a chimey

Combustibles present in automobile exhaust

Flue gas temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Scale formation in boiler is controlled by

Reduction in hardness, silica & alumina in feed water

Keeping the pH value of feed water just below 7

Preheating of feed water

Eliminating H₂S in feed water

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Low excess air

Liquid fuel in the furnace

Very high excess air

Gaseous fuel in the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by

Centrifugation

Floatation & skimming

Ultrafiltration

Chemical coagulation

TRUE ANSWER : ?
YOUR ANSWER : ?

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