🏗️Civil Engineering MCQs
Civil Engineering MCQs
479 MCQs31
The temperature affects the________________?
ABiological activity of bacteria in sewage
BSolubility of gases in sewage
CViscosity of sewage
DAll the above
32
Sludge banks are formed if sewage is disposed of in____________________ ?
ARivers
BSeas
CLakes
DNone of these
33
Chlorination of water is done for the removal of____________________?
ABacterias
BSuspended solids
CSediments
DHardness
34
The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called ____________________?
AInverted syphon
BDepressed sewer
CSag pipe
Dall of these
35
The ratio of maximum sewage flow to average sewage flow for mains up to 1 m in diameter, is___________________?
A1.5
B2.0
C3.0
D4.0
36
In a grit chamber of a sewage treatment plant ____________________?
AFlow velocity 0.15 m to 0.3 m/sec is kept
BDepth of 0.9 m to 1.20 m is kept
COne minute of detention period is kept
DAll the above
37
Lead acetate test in sewer manhole is done to test the presence of ____________________?
AMethane gas
BHydrogen sulphide
CCarbondioxide gas
DDiesel vapours
38
Setting out the alignments of sewers may start from__________________?
ACity
BOut-fall
CTail end
DAny point
39
The most widely used pump for lifting sewage is_________________?
ACentrifugal pump
BReciprocating pump
CPneumatic ejector
DAir pressure pump
40
Cement concrete sewers are only suitable if non-scouring velocity is between_________________?
A2.5 to 3.0 m/sec
B3.0 to 4.0 m/sec
C3.5 to 4.5 m/sec
D4.5 to 5.5 m/sec