The characteristics of fresh and septic sewage respectively are

The bottom of the sewage inlet chamber of septic tanks, is provided an outward slope

A

1 in 5

B

1 in 10

C

1 in 15

D

1 in 20

The sewage treatment in septic tanks is due to

A

Anaerobic decomposition

B

Aerobic decomposition

C

Parasitic decomposition

D

None of these

During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.

A

Filtration

B

Digestion

C

Sedimentation

D

Both B and C

Fine grit present in sewage is removed in the __________ during sewage treatment.

A

Grit chamber

B

Detritus tank

C

Trickling filter

D

Skimming tank

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

A

Organic

B

Fatty

C

Inorganic

D

Dissolved

Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is?

A

Centrifugal pump

B

Pneumatic ejector

C

Reciprocating pump

D

None of these

Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is

A

H₂

B

CH₄

C

CO₂

D

N₂

Which of the following pumps is used to pump sewage solids with liquid sewage without clogging the pump is?

A

Centrifugal pump

B

Pneumatic ejector

C

Reciprocating pump

D

None of these

The pH value of fresh sewage is usually

A

Equal to 7

B

More than 7

C

Less than 7

D

Equal to zero

Fresh sewage is generally

A

Alkaline

B

Acidic

C

Highly decomposed

D

A source of objectionable odour

The characteristics of fresh and septic sewage respectively are

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