🏗️Civil Engineering MCQs
Civil Engineering MCQs
479 MCQs41
Lead caulked joints are used for laying____________________?
AStone ware pipes
BEarthenware pipes
CC.I. pipes
DG.I. pipes
42
If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is_____________________?
A50 ppm
B100 ppm
C150 ppm
D200 ppm
43
The pH value of fresh sewage is usually ______________________?
AEqual to 7
BMore than 7
CLess than 7
DEqual to zero
44
The spacing of bars for perforations in coarse screens used for the treatment of sewage, is ____________________?
A20 mm
B30 mm
C40 mm
D50 mm
45
The sewer pipes__________________?
ACarry sewage as gravity conduits
BAre designed for generating self-cleansing velocities at different discharge
CShould resist the wear and tear caused due to abrasion
DAll the above
46
The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?
A0.05552 cumec
B0.05554 cumec
C0.05556 cumec
D0.0556 cumec
47
The value of Chezy’s constant C = 157.6/(1.81 + K/ ) is used in__________________?
AChezy’s formula
BBazin’s formula
CKutter’s formula
DManning’s formula
48
For large sewers, maximum distance between manholes may be_______________?
A50 m
B100 m
C200 m
D300 m
49
For sewers, inverted siphon is provided for___________________?
AOne pipe
BTwo pipes
CThree pipes
DFour pipes
50
Which one of the following gases is most significant as air pollutant ?
ACarbondioxide
BOxygen
CNitrogen
DSulphur-dioxide