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

Pick up the correct statement from the following :

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

Perched acquifers are generally found

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

Pick up the correct statement from the following :