Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.

Environmental Engineering in CE
Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.

70

3

100

30

70

3

100

30

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Environmental Engineering in CE
Pollution by particulate matter emission in the atmosphere does not take place during metal

Cutting

Grinding

Polishing

Machining

Cutting

Grinding

Polishing

Machining

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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)

B

4B

2B

8B

B

4B

2B

8B

ANSWER DOWNLOAD EXAMIANS APP

Environmental Engineering in CE
Tolerable limit of nitrogen oxides in air is __________ ppm.

1

5

25

0.1

1

5

25

0.1

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Environmental Engineering in CE
Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal

By chemical coagulation

In vacuum filter

In clarifiers

In sedimentation tanks equipped with mechanical scrapper

By chemical coagulation

In vacuum filter

In clarifiers

In sedimentation tanks equipped with mechanical scrapper

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Environmental Engineering in CE
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in

Coagulation and flocculation of colloids

Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate

All of these

Oxidation of carbonaceous matter to CO₂

Coagulation and flocculation of colloids

Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate

All of these

Oxidation of carbonaceous matter to CO₂

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Environmental Engineering in CE

Environmental Engineering in CE Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.

Environmental Engineering in CE Pollution by particulate matter emission in the atmosphere does not take place during metal

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 Tolerable limit of nitrogen oxides in air is __________ ppm.

Environmental Engineering in CE Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal

Environmental Engineering in CE Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in

Environmental Engineering in CE
Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.

Environmental Engineering in CE
Pollution by particulate matter emission in the atmosphere does not take place during metal

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
Tolerable limit of nitrogen oxides in air is __________ ppm.

Environmental Engineering in CE
Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal

Environmental Engineering in CE
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in