NEW
Font size
S
M
L
XL
WorksheetsCivil war Day 21-PWD-Sewage & house drainage
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
The lower surface of a sewer is known as
a)
Crown
b)
Haunch
c)
Invert
d)
Soffit
2.
The sewer which transports sewage to the point of treatment is called
a)
House sewer
b)
Main sewer
c)
Outfall sewer
d)
None of these
3.
In the design of storm sewers, 'time of concentration' is relevant to determine the
a)
Rainfall intensity
b)
Velocity in the sewer
c)
Time of travel
d)
Area served by the sewer
4.
The main constituents of gas generated during the anaerobic digestion of sewage sludge are
a)
Carbon dioxide and methane
b)
Methane and ethane
c)
Carbon dioxide and carbon monoxide
d)
Carbon monoxide and nitrogen
5.
A complete thorough treatment should generally be given to sewage before its disposal in a stream or river if dilution factor available is
a)
Less than 150
b)
Less than 250
c)
Less than 300
d)
Less than 350
6.
High COD to BOD ratio of an organic pollutant represents
a)
High biodegradability of the pollutant
b)
Low biodegradability of the pollutant
c)
Presence of free oxygen for aerobic decomposition
d)
Presence of toxic material in the pollutant
7.
A ventilating pipe connected to or close to the outlet side of a trap seal
a)
Siphonage pipe
b)
Vent pipe
c)
Antisiphonage pipe
d)
Soil pipe
8.
The pipe which is used to discharge foul gases in drains or sewer into the atmosphere is known as
a)
Vent pipe
b)
Soil pipe
c)
Venturi pipe
d)
None of these
9.
The pipe that carries discharge from urinals, water closets etc. is termed as
a)
Waste pipe
b)
Sewer
c)
Soil pipe
d)
Vent pipe
10.
The water supply to a house begins with the connection of the service pipe with the municipal water mains. The connection comprises I. Stopcock II. Goose neck III. Ferrule IV. Water meter. The correct sequence of these connections is
a)
I, II, III, IV
b)
III, II, I, IV
c)
III, I, II, IV
d)
I, II, IV, III
Reset
