The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the

Environmental Engineering in CE
The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the

None of these

Stratosphere

Ionosphere

Troposphere

None of these

Stratosphere

Ionosphere

Troposphere

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Environmental Engineering in CE
Aerobic biological oxidation ponds used for the purification of polluted water

All of these

Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents

Destroys/removes pathogen much more effectively if the sewage is chlorinated

Destroys/removes pathogen from the sewage

All of these

Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents

Destroys/removes pathogen much more effectively if the sewage is chlorinated

Destroys/removes pathogen from the sewage

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Environmental Engineering in CE
Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes

Persistent foam

Explosion hazards

Depletion of dissolved oxygen

Fire hazards

Persistent foam

Explosion hazards

Depletion of dissolved oxygen

Fire hazards

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Environmental Engineering in CE
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the

Atmospheric effect

Ionosphere

Green house

Global warming

Atmospheric effect

Ionosphere

Green house

Global warming

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Environmental Engineering in CE
The length of rectangular sedimentation tank should not be more than(Where ‘B’ is the width of the tank)

2B

8B

4B

B

2B

8B

4B

B

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

95

140

75

120

95

140

75

120

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Environmental Engineering in CE

Environmental Engineering in CE The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the

Environmental Engineering in CE Aerobic biological oxidation ponds used for the purification of polluted water

Environmental Engineering in CE Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes

Environmental Engineering in CE A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the

Environmental Engineering in CE The length of rectangular sedimentation tank should not be more than(Where ‘B’ is the width of the tank)

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

Environmental Engineering in CE
The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the

Environmental Engineering in CE
Aerobic biological oxidation ponds used for the purification of polluted water

Environmental Engineering in CE
Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes

Environmental Engineering in CE
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the

Environmental Engineering in CE
The length of rectangular sedimentation tank should not be more than(Where ‘B’ is the width of the tank)

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