A centrifugal pump is required to be primed before starting if it is located
The permissible amount of nitrites present in potable water, is
If the average daily demand of a city ofpopulation, ism.l.d., the maximum daily demand is
Pickup the incorrect statement from the following :
Hardness of water is caused by
The process of passing water through beds of granular materials, is called
The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called
Water having pH value asis
Recuperation test is carried out to determine
Detention period of a settling tank is
A slow sand filter is cleaned if its filter head is higher than
If Q is discharge is cubicmetres per sec and D is the economical diameter of the pipe. According to Lea
Filtration of water is done to remove
Alum is chemically
Pick up the incorrect statement from the following :
A strainer type well sunk through three pervious layers intervened by three impervious aquicludes, draws water from
Water to the consumers may be supplied from
Generally, first portion of a logistic curve for the population growth of a developing city, represents the growth of
Pick up the correct statement from the following :
The order of existence of three portions of water in a reservoir from the bottom to top is
Perched acquifers are generally found
Turbidity of water is expressed
The approximate diameter of a water mains for supplying 7.2 mld with a velocity 1.2 m/sec, is
At the socket and spigot joint,
The water level in an open well was depressed by pumping 2.5 m and recuperated 2.m in 3 hours andminutes. The yield of the well per minute is
During treatment of water, sedimentation is done
Hard water contains
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