Test: Environmental Engineering - 8

Question 1

Pick out the correct statement.

Accepted Answer

all (a), (b) & (c).

Answer

Noise from ball mills can be dealt with by fibre glass lined enclosures.

Answer

Noise from vibrating chutes can be reduced by lining the metallic chute with rubber.

Answer

Noise of conveyor belt system is reduced by using urethane coated cloth conveyor belts and rubber/plastic covered metallic rollers.

Question 2

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

Accepted Answer

150-300

Answer

1-2

Answer

5-10

Answer

2000-3000

Question 3

Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in

Accepted Answer

food industry.

Answer

municipal sewage treatment.

Answer

petroleum refinery.

Answer

iron & steel plant.

Question 4

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

Accepted Answer

4

Answer

0.01

Answer

0.1

Answer

1

Question 5

Presence of a certain minimum quantity of flourine is desirable in potable water to prevent

Accepted Answer

dental cavities

Answer

scale formation

Answer

water-borne disease

Answer

corrosion

Question 6

Pick out the wrong statement.

Accepted Answer

H₂S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO₂.

Answer

Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust.

Answer

NO₂ is capable of penetrating the troposphere and can absorb both ultraviolet & visible light.

Answer

Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber trees.

Question 7

Which of the following is not an air pollutant ?

Accepted Answer

Ozone

Answer

Carcinogens

Answer

Pesticides

Answer

Metallic powders

Question 8

Presence of high concentration of ozone and smog in atmospheric air causes the

Accepted Answer

cracking of rubber products.

Answer

embrittlement & decrease of folding resistance of paper.

Answer

fading of dye on textiles.

Answer

damage of electrical insulator on high tension power line.

Question 9

Algae growth in water is controlled by

Accepted Answer

chlorination

Answer

deoxidation

Answer

bleaching

Answer

aeration

Question 10

__________ is removed from water by lime-soda process.

Accepted Answer

Temporary hardness

Answer

Foul smell and taste

Answer

Iron and manganese

Answer

Permanent hardness

Question 11

Most of the bacteria in sewage are

Accepted Answer

saprophytic

Answer

parasitic

Answer

anerobic

Answer

none of these

Question 12

Which of the following is the most major constituents of air pollutants ?

Accepted Answer

Oxides of sulphur

Answer

Oxides of nitrogen

Answer

Carbon monoxide

Answer

Hydrogen sulphide

Question 13

Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.

Accepted Answer

80

Answer

25

Answer

50

Answer

120

Question 14

Carbonaceous particles having size less than 1 μm are called

Accepted Answer

smoke

Answer

grit

Answer

aggregates

Answer

aerosols

Question 15

__________ substances present in sewage are removed in grit chamber during sewage treatment.

Accepted Answer

Inorganic

Answer

Organic

Answer

Fatty

Answer

Dissolved

Question 16

The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.

Accepted Answer

aerobic

Answer

anaerobic

Answer

saphrophytic

Answer

parasitic

Question 17

Presence of dissolved impurities of __________ is responsible for the red brownish color of water.

Accepted Answer

iron & manganese

Answer

carbonates

Answer

bi-carbonates

Answer

arsenic

Question 18

TLV of aldrin in public water supply system is about __________ μg/litre.

Accepted Answer

17

Answer

0.5

Answer

357

Answer

1097

Question 19

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

Accepted Answer

10000 to 100000

Answer

1000 to 2000

Answer

3000 to 6000

Answer

6000 to 9000

Question 20

Removal of __________ is accomplished by aeration of water.

Accepted Answer

dissolved gases

Answer

suspended solids

Answer

dissolved solids

Answer

none of these

Question 21

Green house effect is accentuated by

Accepted Answer

all (a), (b) and (c).

Answer

deforestation.

Answer

rapid industrialisation.

Answer

increased transportation activity.

Question 22

Thermal pollution due to excessive heat & temperature in the working place causes

Accepted Answer

all (a), (b) & (c).

Answer

reduction in working efficiency of manpower.

Answer

fatigue.

Answer

high breathing rate.

Question 23

High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes

Accepted Answer

cancer

Answer

silicosis

Answer

respiratory disease (e.g., asthma)

Answer

reduced crop yield

Question 24

World environment day is observed every year on the 5th of

Accepted Answer

June

Answer

December

Answer

July

Answer

September

Question 25

The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is

Accepted Answer

cavitation.

Answer

pipe vibrations.

Answer

boundary layer separation.

Answer

fluctuation in liquid flow.

Environmental Engineering - 8 - GATE Civil Free MCQ Test with solutions

MCQ Practice Test & Solutions: Test: Environmental Engineering - 8 (25 Questions)

Pick out the correct statement.

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

Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in

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

Presence of a certain minimum quantity of flourine is desirable in potable water to prevent

Pick out the wrong statement.

Which of the following is not an air pollutant ?

Presence of high concentration of ozone and smog in atmospheric air causes the

Algae growth in water is controlled by

__________ is removed from water by lime-soda process.

Most of the bacteria in sewage are

Which of the following is the most major constituents of air pollutants ?

Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.

Carbonaceous particles having size less than 1 μm are called

__________ substances present in sewage are removed in grit chamber during sewage treatment.

The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.

Presence of dissolved impurities of __________ is responsible for the red brownish color of water.

TLV of aldrin in public water supply system is about __________ μg/litre.

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

Removal of __________ is accomplished by aeration of water.

Green house effect is accentuated by

Thermal pollution due to excessive heat & temperature in the working place causes

High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes

World environment day is observed every year on the 5th of

The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is

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Environmental Engineering

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Environmental Engineering - 8 - GATE Civil Free MCQ Test with solutions

MCQ Practice Test & Solutions: Test: Environmental Engineering - 8 (25 Questions)

Pick out the correct statement.

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

Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in

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

Presence of a certain minimum quantity of flourine is desirable in potable water to prevent

Pick out the wrong statement.

Which of the following is not an air pollutant ?

Presence of high concentration of ozone and smog in atmospheric air causes the

Algae growth in water is controlled by

__________ is removed from water by lime-soda process.

Most of the bacteria in sewage are

Which of the following is the most major constituents of air pollutants ?

Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.

Carbonaceous particles having size less than 1 μm are called

__________ substances present in sewage are removed in grit chamber during sewage treatment.

The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.

Presence of dissolved impurities of __________ is responsible for the red brownish color of water.

TLV of aldrin in public water supply system is about __________ μg/litre.

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

Removal of __________ is accomplished by aeration of water.

Green house effect is accentuated by

Thermal pollution due to excessive heat & temperature in the working place causes

High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes

World environment day is observed every year on the 5th of

The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is

Environmental Engineering

Environmental Engineering

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