MCQs on Reducing Water Pollution

By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

MCQs on Reducing Water Pollution

_____ is the BOD value of the domestic sewage.

(A).  166

(B).  161

(C).  160

(D).  168

(E). None of these

Multiple Choice Question Answer:   166

From the ____ non-hazardous organic wastes from the sewage is to be separated.

(A).  Protozoa

(B).  Bacteria

(C).  Helminth

(D).  Toxic industrial wastes

(E). None of these

Multiple Choice Question Answer:   Toxic industrial wastes

Under the_____conditions, domestic water treatment is carried out.

(A).  Cannot be known

(B).  Anaerobic

(C).  Can be known

(D).  Depends on the pollution level of water

(E). None of these

Multiple Choice Question Answer:   Aerobic

_____ is the BOD value of industrial waste.

(A).  100

(B).  400

(C).  300

(D).  200

(E). None of these

Multiple Choice Question Answer:   200

_____ should be the BOD value for the food industry.

(A).  742

(B).  745

(C).  744

(D).  743

(E). None of these

Multiple Choice Question Answer:   745

_____is done after the primary treatment in domestic water treatment.

(A).  Anaerobic process

(B).  Sedimentation

(C).  Aerobic process

(D).  Screening

(E). None of these

Multiple Choice Question Answer:   Screening

_____is released in the domestic water process when air is sent during the active sludge.

(A).  Carbondioxide

(B).  Oxygen

(C).  Nitrogen

(D).  Chlorine

(E). None of these

Multiple Choice Question Answer:   Carbondioxide

The effluent contain___BOD in the final step of the domestic water process.

(A).  10ppm

(B).  15ppm

(C).  25ppm

(D).  20ppm

(E). None of these

Multiple Choice Question Answer:  25ppm

______is also known as an aerobic process.

(A).  Sedimentation

(B).  Sludge thickening process

(C).  Activated sludge process

(D).  Screening Activated sludge process

(E). None of these

Multiple Choice Question Answer:  Activated sludge process

____of biodegradable water is converted into biomass by the aerobic process.

(A).  10%

(B).  30%

(C).  75%

(D).  50%

(E). None of these

Multiple Choice Question Answer:    50%

The organic acid and alcohol are undergoing into___process an anaerobic treatment.

(A).  Sedimentation

(B).  Fermentation

(C).  Catalysis

(D).  Screening

(E). None of these

Multiple Choice Question Answer:   Fermentation

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