As compared to cast iron pipes, steel pipes are______________?
(A) heavier
(B) stronger
(C) costlier
(D) less susceptible to corrosion
The layout of distribution system in which water flows towards the outer periphery is_________________?
(A) ring system
(B) dead end system
(C) radial system
(D) grid iron system
Which of the following methods of analysis of water distribution system is most suitable for long and narrow pipe system ?
(A) circle method
(B) equivalent pipe method
(C) Hardy cross method
(D) electrical analysis method
The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is____________________?
(A) reflux valve
(B) sluice valve
(C) air relief valve
(D) pressure relief valve
A sewer that receives the discharge of a number of house sewers is called________________?
(A) house sewer
(B) lateral sewer
(C) intercepting sewer
(D) submain sewer
For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be________________?
(A) separate system
(B) combined system
(C) partially combined system
(D) partially separate system
If Biochemical oxygen demand (BOD. of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is_________________?
(A) 1000
(B) 4000
(C) 100000
(D) 400000
The hydraulic mean depth (HMD. for an egg-shaped sewer flowing two-third full is_______________?
(A) equal to HMD when flowing full
(B) less than HMD when flowing full
(C) greater than HM
(D) when flowing full
Sewerage system is usually designed for_________________?
(A) 10 years
(B) 25 years
(C) 50 years
(D) 75 years
Period of cleaning of slow sand filters is about________________?
(A) 24 – 48 hours
(B) 10-12 days
(C) 2-3 months
(D) 1-2 year