Category: Environmental Engineering

A. rectangular section
B. circular section
C. standard form of egg shaped sewer
D. modified egg shaped section

A. 0.25 to 0.35 mm
B. 0.35 to 0.60 mm
C. 0.60 to 1.00 mm
D. 1.00 to 1.80 mm

A. parasitic
B. saprophytic
C. pathogenic
D. anaerobic

A. N = y + R
B. y = N + R
C. R = N + y
D. R > (N + y)

A. equal to HMD when flowing full
B. less than HMD when flowing full
C. greater than HMD when flowing full
D. none of the above

A. 4 mm/hr
B. lOmm/hr
C. 20 mm/hr
D. 40 mm/hr

A. at street corners to control the flow of water
B. at every depression and dead ends to drain out the waste water that may collect there
C. at the foot of rising main along the slope to prevent back running of water
D. at every summit of rising mains

A. check valve
B. sluice valve
C. safety valve
D. scour valve

A. ultra violet rays treatment
B. lime treatment
C. by using potassium permanganate
D. chlorination

A. directly proportional to BOD satisfied
B. directly proportional to BOD remain-ing
C. inversely proportional to BOD satisfied
D. inversely proportional to BOD re-maining