Waste Water Engineering

A. Carbondioxide
B. Methane
C. Ammonia
D. Carbon monoxide

A. Over flow rate
B. Surface loading
C. Over flow velocity
D. All the above

A. 30 minutes
B. 1 hour
C. 1 hour and 30 minutes
D. 2 hours

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

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

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

A. Top of smaller sewer is kept lower
B. Top of larger sewer is kept lower
C. Tops of both the sewers are at the same level
D. None of these

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

A. Main sewer
B. Outfall sewer
C. Branch sewer
D. House sewer

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