ENVIRONMENTAL ENGINEERING IN CE QUIZ

Which of the following is not a practical method of low level radioactive waste disposal?

Dilution with inert material

Discharging to atmosphere through tall stacks after dilution

Filling in steel crates and shooting it off out of earth

Disposing off in rivers & oceans

TRUE ANSWER : ?
YOUR ANSWER : ?

Soluble silica present in boiler feed water can be removed by

Anion exchanger

Coagulation

Preheating it

Filtration

TRUE ANSWER : ?
YOUR ANSWER : ?

Iron & manganese present as pollutant in water can not be removed by

Chlorination

Ion exchange process

Lime soda process or manganese zeolite process

Oxidation followed by settling & filtration

TRUE ANSWER : ?
YOUR ANSWER : ?

Algae growth in water is controlled by

Deoxidation

Aeration

Bleaching

Chlorination

TRUE ANSWER : ?
YOUR ANSWER : ?

The common pollutant generated in chlor-alkali industry and battery manufacture is

None of these

Brine

Mercury

Phosphate

TRUE ANSWER : ?
YOUR ANSWER : ?

BOD of raw municipal sewage may be in the range of about __________ mg/litre.

2000-3000

1-2

5-10

150-300

TRUE ANSWER : ?
YOUR ANSWER : ?

A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.

10000 to 100000

3000 to 6000

1000 to 2000

6000 to 9000

TRUE ANSWER : ?
YOUR ANSWER : ?

Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of

Ultraviolet light for irradiation of water

Chlorine or its compounds

Ozone and iodine

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.

1000

2000

100

5

TRUE ANSWER : ?
YOUR ANSWER : ?

In a sedimentation tank, the detention period for water ranges from __________ hours.

24 to 32

8 to 12

2 to 4

16 to 20

TRUE ANSWER : ?
YOUR ANSWER : ?

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