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Free download in PDF Water Supply Engineering Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
The fire demand of a city may be worked out by
[A]
Kuichling's formula
[B]
Freeman formula
[C]
Under Writers formula
[D]
All the above
(22)
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
[A]
1880 kilo litres
[B]
2880 kilo litres
[C]
3880 kilo litres
[D]
4880 kilo litres
(23)
Time of concentration
[A]
is the time taken, for precipitation
[B]
duration of rainfall.
[C]
time taken for all the ran off to reach the drain
[D]
time taken for the storm water to travel from the most remote point to the drain.
Answer: time taken for the storm water to travel from the most remote point to the drain.
(24)
Average annual rainfall at any station is the average of annual rainfall over a period of
[A]
35 years
[B]
21 years
[C]
7 years
[D]
14 years
(25)
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
[A]
2.75 m
[B]
3.00 m.
[C]
2 m
[D]
2.50 m
(26)
Sunlight
[A]
helps growth of bacterias
[B]
impedes growth of algae
[C]
increases dissolved oxygen content
[D]
reduces turbidity
Answer: impedes growth of algae
(27)
Disinfection of drinking water, is done to remove
[A]
odour
[B]
bacterias
[C]
turbidity
[D]
colour
(28)
Pick up the incorrect statement from the following. The underground sources of water, is from
[A]
storage reservoirs
[B]
infiltration wells
[C]
wells
[D]
springs
Answer: storage reservoirs
(29)
The factor affecting per capita demand, is
[A]
size of the city
[B]
climatic conditions
[C]
pressure in water mains
[D]
all the above.
(30)
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
[A]
1485 m.
[B]
1475 m
[C]
1500 m
[D]
1505 m
31
According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for
[A]
Boarding schools
[B]
Nurses home and medical quarters
[C]
hostels
[D]
all the above.
32
The least thickness of class B cast iron (spun) pipe, is
[A]
7.2 mm
[B]
7.9 mm
[C]
8.6 mm
[D]
10 mm.
33
For determining the velocity of flow of underground water, the most commonly used non-empirical formula is
[A]
Darcy's formula
[B]
Slichter's formula
[C]
Hazen's formula
[D]
Lacy's formula
34
By boiling water, hardness can be removed if it is due to
[A]
calcium sulphate
[B]
magnesium sulphate
[C]
calcium nitrate
[D]
calcium bicarbonate
Answer: calcium bicarbonate
35
The maximum depth of sedimentation tanks is limited to
[A]
6 m.
[B]
2 m
[C]
4 m
[D]
3 m
36
Asbestos pipes are
[A]
light in weight and easy to transport
[B]
highly resistant to corrosion
[C]
high flexible to accommodate deflection upto 12°
[D]
all the above
37
Water supply includes
[A]
collection, transportation and treatment of water
[B]
distribution of water to consumers
[C]
provision of hydrants for fire fighting
[D]
all the above
38
Turbidity of raw water is a measure of
[A]
suspended solids
[B]
acidity of water
[C]
B.O.D.
[D]
none of these
39
The population growth curve is
[A]
S-shaped curve
[B]
parabolic curve
[C]
circular curve
[D]
straight line
40
Manholes along the mains from the source to a city are provided at 500 m intervals in
[A]
steel pipes
[B]
R.C.C. pipes
[C]
hume steel pipes
[D]
all the above
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