Top 250+ Solved Water and Wastewater Engineering MCQ Questions Answer
Q. Economic height of a dam is the height corresponding to which
a. Cost of the dam per unit of storage is minimum
b. Amount of silting is less
c. Cost of dam per unit storage is maximum
d. Free board provided is least
Q. The population growth curve is
a. S-shaped curve
b. Parabolic curve
c. Circular curve
d. Straight line
Q. The fire demand for ascertaining the empirical formula 1136.5 [(P/10) + 10] known as
a. Kuichling's formula
b. Buston's formula
c. Freeman formula
d. Under Writers formula
Q. The bacterias which may survive with or without free oxygen, are called
a. Aerobic bacterias
b. Anaerobic bacterias
c. Facultative bacteria's
d. None of these
Q. The maximum pressure to which cast iron pipes may be subjected to, is
a. 3 kg/cm2
b. 5 kg/cm2
c. 7 kg/cm2
d. 10 kg/cm2
Q. Water may not contain much impurity if its source is
a. Reservoirs
b. Stream flowing in plains
c. Lakes in lower regions
d. Spring along hill slopes
Q. Turbidity of water is expressed
a. In ppm
b. In numbers in an arbitrary scale
c. By pH value
d. By colour code
Q. In plain sedimentation tanks under normal conditions, impurities are removed upto
a. 60 %
b. 70 %
c. 80 %
d. 90 %
Q. In slow sand filters, the turbidity of raw water can be removed only up to
a. 60 mg/litre
b. 75 mg/litre
c. 100 gm/litre
d. 150 mg/litre
Q. Pressure relief valves are provided in water mains
a. To reduce the pressure
b. At low points
c. Upstream of sluice
d. All the above
Q. At break point of chlorination,
a. Chlorine is used to oxidise
b. Residual chloride is zero
c. Residual chloride is maximum
d. Residual chlorine reappears