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WorksheetsCivil war-Day 30-LSGD-Sewers
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
What is a sewer that runs full under gravity, flow at a pressure above the atmosphere in the sewer called?
a)
Flushing manhole
b)
Inverted siphon
c)
Siphon
d)
Curb inlet
2.
What are the structures that are constructed at suitable intervals along the sewerage system called
a)
Manholes
b)
Catch basins
c)
Pumps
d)
none
3.
The most prominent force acting on the underground sewer pipes would be
a)
Compressive force
b)
Tensile force
c)
Bending force
d)
All of these
4.
In sewer joints, the bandage joint is mostly used for
a)
Cast iron pipe
b)
Steel pipes
c)
Plastic pipes
d)
Concrete pipes
5.
Which of the following is incorrect regarding stoneware sewer?
a)
They can withstand tensile stress
b)
They are highly resistant to sulphide corrosion
c)
They have smooth interior
d)
They have high compressive strength
6.
The laying of sewers is done with
a)
Magnetic compass
b)
Theodolite
c)
Sight rails and boning rods
d)
Clinometer
7.
The equipment used for checking levels of sewer invert is
a)
Dumpy level
b)
Theodolite
c)
Boning rod
d)
All of these
8.
Which of the following are leakage tests
a)
Smoke test
b)
Water test
c)
Air test
d)
All the above
9.
Test in sewer for checking obstruction is
a)
Water test
b)
Smoke test
c)
Ball test
d)
None of these
10.
If a paper moistened with lead acetate for five minutes when placed in manhole turns black, the sewer certainly contains
a)
Hydrogen sulphide
b)
Carbon dioxide
c)
Methane
d)
Oxygen
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