The yield of a rapid gravity filter as compared to that of slow sand filter, is
The yield of a rapid gravity filter as compared to that of slow sand filter, is
Turbidity of raw water is a measure of
Turbidity of raw water is a measure of
Pick up the correct statement from the following:
Pick up the correct statement from the following:
Surge tanks are used
Surge tanks are used
Asbestos pipes are
Asbestos pipes are
Corrosion of well pipes may not be reduced by
Corrosion of well pipes may not be reduced by
Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be
Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be
For the prediction of future population of a city, the factor to be considered, is
For the prediction of future population of a city, the factor to be considered, is
For determining the velocity of flow of underground water, the most commonly used non-empirical formula is
For determining the velocity of flow of underground water, the most commonly used non-empirical formula is
Average annual rainfall at any station is the average of annual rainfall over a period of
Average annual rainfall at any station is the average of annual rainfall over a period of
In distribution pipes, drain valves are provided at
In distribution pipes, drain valves are provided at
The process of passing water through beds of granular materials, is called
The process of passing water through beds of granular materials, is called
While determining the yield of open wells by the pumping test
While determining the yield of open wells by the pumping test
If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is
If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is
By boiling water, hardness can be removed if it is due to
By boiling water, hardness can be removed if it is due to
The factor affecting per capita demand, is
The factor affecting per capita demand, is
The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level
The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level
Surcharge storage zone of a reservoir, is
Surcharge storage zone of a reservoir, is
Acidity in water is caused due to
Acidity in water is caused due to
Specific capacity or yield of wells, is generally expressed, as
Specific capacity or yield of wells, is generally expressed, as
The specific retention is least in case of
The specific retention is least in case of
Pick up the correct statement from the following:
Pick up the correct statement from the following:
Time of concentration
Time of concentration
As per IS : 1172-1963, water required per head per day for average domestic purposes, is
As per IS : 1172-1963, water required per head per day for average domestic purposes, is
The fire demand of a city may be worked out by
The fire demand of a city may be worked out by
Aeration of water is done to remove
Aeration of water is done to remove
Mathamoglobinemia or blue baby disease is caused due to
Mathamoglobinemia or blue baby disease is caused due to
Pick up the correct statement from the following:
Pick up the correct statement from the following:
Disinfection of drinking water, is done to remove
Disinfection of drinking water, is done to remove
To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 √Q, the water horse power of the pump is
To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 √Q, the water horse power of the pump is
The maximum depth of sedimentation tanks is limited to
The maximum depth of sedimentation tanks is limited to
If the chosen diameter of a pipe, is less than the economical diameter
If the chosen diameter of a pipe, is less than the economical diameter
In pressure supply mains, water hammer pressure is reduced by providing
In pressure supply mains, water hammer pressure is reduced by providing
In slow sland filters, the turbidity of raw water can be removed only up to
In slow sland filters, the turbidity of raw water can be removed only up to
When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied
When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied
Pick up the incorrect statement from the following. The underground sources of water, is from
Pick up the incorrect statement from the following. The underground sources of water, is from
In centrifugal pump installation,
In centrifugal pump installation,
The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is
The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is
According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for
According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for
The least thickness of class B cast iron (spun) pipe, is
The least thickness of class B cast iron (spun) pipe, is
