ENVIRONMENTAL ENGINEERING IN CE QUIZ

As compared to rapid sand filters, slow sand filters give<br/>(i) Slower filtration rate<br/>(ii) Higher filtration rate<br/>(iii) Lesser efficiency in removal of bacteria<br/>(iv) Higher efficiency in removal of bacteria<br/>The correct answer is

(ii) and (iii)

(i) and (ii)

(ii) and (iv)

(i) and (iv)

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most detrimental for water used in high pressure boiler?

Phenol

Silica

Dissolved oxygen

Turbidity

TRUE ANSWER : ?
YOUR ANSWER : ?

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

4

0.01

0.1

1

TRUE ANSWER : ?
YOUR ANSWER : ?

Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the

Electrostatic precipitator

Cyclone separator

Bag filter

Gravity settling chamber

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a secondary air pollutant?

Photochemical smog

Ozone

Sulphur dioxide

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Hydrogen ion concentration in distilled water is

7 x 10⁷

10⁻⁷

10⁷

7 x 10⁻⁷

TRUE ANSWER : ?
YOUR ANSWER : ?

Presence of __________ hardness is responsible for the temporary hardness in water.

Choride

Sulphate

Carbonate

Calcium

TRUE ANSWER : ?
YOUR ANSWER : ?

Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.

Ortho-xylene

Coal ash

Potassium cyanide

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Dissolved oxygen content in river water is around __________ ppm.

500

100

250

5

TRUE ANSWER : ?
YOUR ANSWER : ?

TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

25

100

0.1

1000

TRUE ANSWER : ?
YOUR ANSWER : ?

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