For detecting the nitrates in sewage, the colour may be developed by adding

For detecting the nitrites in the sewage, the matching colour may be developed by adding

A

Potassium permanganate

B

Sulphuric acid and napthamine

C

Phenol-di -sulphuric acid potassium hydroxide

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

In sewage treatment, its sedimentation is speeded up by commonly adding

A

Hydrochloric acid

B

Lime

C

Copper sulphate

D

Sodium sulphate

Contraindications of nitrates are

A

Hypotension

B

Right ventricular infarction

C

Hypertrophic obstructive cardiomyopathy

D

Pregnancy

E

Diabetic nephropathy

Plants absorb dissolved nitrates from soil and convert them into

A

free nitrogen

B

urea

C

ammonia

D

proteins

For detecting the nitrates in sewage, the colour may be developed by adding

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