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Civil Engineering Mcqs

Pick up the incorrect statement from the following for allowing workers to enter sewers_______________?

Civil Engineering Mcqs, Waste Water Engineering /
Pick up the incorrect statement from the following for allowing workers to enter sewers_______________?

A. The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 minutes
B. Proper tests for the presence of poisonous gases must be carried out
C. The men entering the manhole should be advised to smoke in the sewer
D. Warning signals should be erected

Pick up the incorrect statement from the following for allowing workers to enter sewers_______________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is_________________?

Civil Engineering Mcqs, Waste Water Engineering /
To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is_________________?

A. 0.50 m/sec
B. 0.60 m/sec
C. 0.70 m/sec
D. 0.75 m/sec

To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is_________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

The normal values of over flow rates for sedimentation tanks using coagulant, ranges between__________________?

Civil Engineering Mcqs, Waste Water Engineering /
The normal values of over flow rates for sedimentation tanks using coagulant, ranges between__________________?

A. 25,000 to 35,000 litres/sqm/day
B. 40,000 to 50,000 litres/sqm/day
C. 50,000 to 60,000 litres/sqm/day
D. 80,000 to 100,000 litres/sqm/day

The normal values of over flow rates for sedimentation tanks using coagulant, ranges between__________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for__________________?

Civil Engineering Mcqs, Waste Water Engineering /
Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for__________________?

A. Unexpected large scale infiltration of stream water
B. Unexpected increase in the population
C. Under estimates of maximum and average flows
D. All of the above

Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for__________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________?

Civil Engineering Mcqs, Waste Water Engineering /
For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________?

A. 16 m
B. 20 m
C. 24 m
D. 30 m

For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

If q is the average sewage flow from a city of population P, the maximum sewage flow______________?

Civil Engineering Mcqs, Waste Water Engineering /
If q is the average sewage flow from a city of population P, the maximum sewage flow______________?

A. Q = [(4 + )/(18 + )] q
B. Q = [(18 + P)/(4 + )] q
C. Q = [(18 + )/(4 + )] q
D. Q = [(5 + )/((15 + )] q

If q is the average sewage flow from a city of population P, the maximum sewage flow______________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________?

Civil Engineering Mcqs, Waste Water Engineering /
If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________?

A. Hydrogen sulphide
B. Carbon dioxide
C. Methane
D. Oxygen

If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________? Read More »

Civil Engineering Mcqs, Waste Water Engineering