Online Civil Engineering Test - Water Supply Engineering Test

Instruction:

  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
  • DO NOT refresh the page.
  • All the best!

Marks : 2/20


Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.

1.
Corrosion of well pipes may not be reduced by
reducing the draw down and the pumping rate
reducing the flow velocity
using thicker pipes
using screens having larger area of openings
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

2.
Pick up the correct statement from the following :
Detention period for plain sedimentation tanks ranges between 4 to 8 hours
Detention period for sedimentation tanks, using coagulants usually ranges between 2 to 4 hours
The horizontally flow velocity in sedimentation tanks, is generally limited to 0.3 m/minute
All the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

3.
Turbidity of raw water is a measure of
suspended solids
acidity of water
B.O.D.
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

4.
Flow through period, in sedimentation tanks, is
equal to detention period
more than detention period
less than detention period
detention period divided by displacement efficiency
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

5.
Increase in population of a rapidly growing city, may be estimated by
arithmetical mean method
geometrical method
incremental increase method
graphical comparison method.
Your Answer: Option
(Not Answered)
Correct Answer: Option

6.
In pumping stations, the type of joint generally used, is
socket and spigot joint
flanged joint
expansion joint
dresser coupling joint
flexible joint.
Your Answer: Option
(Not Answered)
Correct Answer: Option

7.
Maximum threshold number permitted for indicating the odour of public water supplies, is
1
2
3
4
5
Your Answer: Option
(Not Answered)
Correct Answer: Option

8.
The cast iron pipes for water supply system are used for
durability
strength
easy connection
low maintenance cost
all the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

9.
The approximate diameter of a water mains for supplying 7.2 mld with a velocity 1.2 m/sec, is
24 cm
26 cm
28 cm
30 cm
32 cm.
Your Answer: Option
(Not Answered)
Correct Answer: Option

10.
'Shrouding' is essentially provided in
strainer type wells
cavity type wells
slotted type well
all the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

11.
Q is the discharge from an unconfined tube well with depression head S through a pipe of radius rw. If the radius of influence is R, the minimum required length of the strainer, is
Your Answer: Option
(Not Answered)
Correct Answer: Option

12.
Chemical coagulation of drinking water, is done
to settle suspended materials
to increase rate of settlement of suspended materials
to remove the bacterias
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

13.
Dissolved carbon dioxide, can be removed from the supply main by
sedimentation
aeration
chlorination
coagulation
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

14.
While designing a water supply of an industrial township, industrial and commercial water demand of total supply, is assumed
10%
10 to 15%
15 to 20%
20 to 25%.
Your Answer: Option
(Not Answered)
Correct Answer: Option

15.
Manholes are less common in
cast iron pipes
steel pipes
hume steel pipes
R.C.C. pipes.
Your Answer: Option
(Not Answered)
Correct Answer: Option

16.
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
400
450
500
580
600
Your Answer: Option
(Not Answered)
Correct Answer: Option

17.
Pick up the correct statement from the following :
The precipitation during its travel in atmosphere dissolves certain gases
Rain water which percolates through the ground, is free from suspended materials
Under ground water may dissolve minerals and salts present in the earth's layers
Small quantities of iron, calcium and magnesium dissolved in water, may be useful for human health
All the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

18.
The flow of water gets retarded, in
settling tank
sedimentation tank
clarifer
sedimentation basin
all the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

19.
Cast iron pipes
are widely used in city water supplies
resist corrosion satisfactorily
may last for 100 years
are normally manufactured in lengths of about 3.5 m
all the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

20.
Most important method for calculating discharge for planning a water supply project, is
velocity area method
weir or spillway method
use of venturi-meter
using power plant consumption
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

*** END OF THE TEST ***
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