Top 250+ Solved Water and Wastewater Engineering MCQ Questions Answer
Q. The process of passing water through beds of granular materials, is called
a. Screening
b. Sedimentation
c. Filtration
d. None of these
Q. For the prediction of future population of a city, the factor to be considered, is
a. Births
b. Deaths
c. Migrants
d. All the above
Q. Mathamoglobinemia or blue baby disease is caused due to
a. Chlorides
b. Nitrites
c. Nitrates
d. Sulphides
Q. To control the growth of algae in reservoirs, the compound which is used, is
a. Bleaching powder
b. Copper sulphate
c. Lime solution
d. Alum solution
Q. A pressure conduit laid underground, may not be subjected to
a. Internal pressure of water
b. Pressure due to external load
c. Longitudinal temperature stress
d. Longitudinal stresses due to unbalanced pressure to bends
Q. The bacterias which require free oxygen for their survival, are called
a. Aerobic bacterias
b. Anaerobic bacterias
c. Facultative bacteria
d. None of these
Q. The bed slope in slow sand filters, is generally kept
a. 1 in 50
b. 1 in 75
c. 1 in 100
d. 1 : 200
Q. Perched aquifers are generally found
a. On the surface of the ground
b. Below the surface of the ground but above water table
c. Below the water table
d. All the above
Q. A centrifugal pump is required to be primed before starting if it is located
a. At higher level than water level of reservoir
b. At lower level than water level of reservoir
c. Both (a) and (b)
d. Neither (a) nor (b)
Q. Normal values of overflow rate for plain sedimentation tank, is
a. 250 to 500 litres/hr/m2
b. 500 to 750 litres/hr/m2
c. 750 to 1000 litres/hr/m2
d. 1000 to 1250 litres/hr/m2
Q. 'Shrouding' is essentially provided in
a. Strainer type wells
b. Cavity type wells
c. Slotted type well
d. All the above
Q. The maximum permissible hardness for public supplies is
a. 95 mg/litre
b. 105 mg/litre
c. 115 mg/litre
d. 125 mg/litre
Q. The chlorine supply cylinders are generally kept at 38°C to 40°C to prevent
a. Conversion into crystals
b. It from burning
c. It from explosion
d. None of these