- (A) House sewer
- (B) Lateral sewer
- (C) Branch sewer
- (D) Sewer outfall
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- (A) CO
- (B) SO2
- (C) CO2
- (D) O3
- (A) 100 cm
- (B) 120 cm
- (C) 140 cm
- (D) 160 cm
- (A) Horizontally
- (B) Vertically
- (C) At an angle of 30°
- (D) At an angle of 60°
- (A) Carbondioxide gas
- (B) Hydrogen sulphide gas
- (C) Methane gas
- (D) Petrol vapours
- (A) 50 mg/l
- (B) 100 mg/l
- (C) 150 mg/l
- (D) 250 mg/l
- (A) It is cheaper in construction
- (B) It provides maximum area for a given perimeter
- (C) It provides maximum hydraulic mean depth
- (D) All the above
- (A) 5
- (B) 10
- (C) 15
- (D) 20
- (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) 0.4 to 0.5 m
- (B) 0.5 to 0.7 m
- (C) 0.7 to 0.9 m
- (D) 0.9 to 1.20 m
