Top 350+ Solved Public Health Engineering MCQ Questions Answer
Q. The amount of oxygen consumed by sewage from an oxidising agent like potassium dichromate is termd as
a. bio-chemical oxygen demand (B.O.D.)
b. chemical oxygen demand (C.O.D.)
c. relative stability
d. none of these
Q. A separate system will be favourable when
a. the sewers are to be laid in rocks
b. the finances are limited
c. the topography is flat necessitating deep excavation for combined sewers
d. all of the above
Q. The valve provided on the suction pipe in a tube well is
a. sluice valve
b. air relief valve
c. pressure relief valve
d. reflux valve
Q. Which of the following statement is correct?
a. Screens are inclined to increase the opening are
b. Plain sdimentation is useful as a process preliminary to further treatments.
c. Ratio of the volume of the basin of sedimentation tank to the rate of flow is called detention period
d. all of the above
Q. According to Indian standards, the consumption of water per capita per day for nursing homes, boarding schools and hostels is
a. 85 litres
b. 100 litres
c. 115 litres
d. 135 litres
Q. The equipment used for removing paper and rags from sewers is called
a. gouge
b. scoop
c. claw
d. scraper
Q. Run-off is the water which flows
a. in infiltration galleries
b. in sewer pipes
c. due to leakage of pipes
d. in rivers
Q. In preliminary treatment of sewage, the operation which takes place, is
a. removal of fine suspended particles
b. removal of fine dissolved organic material
c. removal of lighter floating material
d. removal of harmful bacterias and other organisms
Q. The hydrants are used for tapping waer from mains for
a. fire extinguishing
b. street washing
c. flushing sewer lines
d. all of these
Q. The presence of calcium and magnesium bi-carbonates in water causes hardness in the water.
a. Correct
b. Incorrect
Q. The time of contact for chlorination should be at least
a. 5 minutes
b. 20 minutes
c. 1 hour
d. 2 hours
Q. A sewer which receives discharge of a number of house sewers is called a
a. common sewer
b. trunk sewer
c. lateral sewer
d. branch sewer