Category: Waste Water Engineering

A. Highly resistant to sulphide corrosion
B. Highly impervious
C. Hydraulically efficient because of their smooth interior surface
D. Especially suited to pressure pipes

A. 45 %
B. 50 %
C. 55 %
D. 60 %

A. Should be sunk by 20 cm
B. Should be kept 20 cm above the adjacent portion
C. Should be sunk by 50 cm
D. Need not be sunk

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

A. Circular
B. Egg shaped
C. Rectangular
D. Horse shoe shaped

A. Water test is carried out to check water tightness of the joints
B. Test for straightness is carried out with the help of a lamp and mirror
C. Obstruction test is carried out with the help of smooth ball of diameter 13 mm
D. All the above

A. Minimum flow
B. Maximum flow
C. Both A. and B.
D. None of these

A. Is only provided
B. Is doubled
C. Is trebled
D. Is not enough

A. Carbondioxide
B. Hydrogen sulphide
C. Methane
D. All of these

A. The process of decomposing the organic matter under controlled anaerobic conditions, is called sludge digestion
B. Sludge digestion is carried out in sludge tank
C. The gases produced in sludge digestion process, contain 75% carbon dioxide
D. The gases produced in sludge digestion process, contain 75% methane