🏗️Civil Engineering MCQs
Civil Engineering MCQs
479 MCQs51
A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is_____________________?
A2.30 m
B2.40 m
C2.45 m
D2.50 m
52
Depletion of ozone layer in the outer atmosphere may cause___________________ ?
ALung cancer
BSkin cancer
CBronchitis
DHeart disorder
53
The quantity of liquid waste which flows in sewers during the period of rainfall, is known__________________?
ASanitary sewage
BIndustrial waste
CStorm sewage
DNone of these
54
A five day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is____________________?
A100
B1000
C5000
D10000
55
The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be__________________?
A0.9 cm
B1.2 m
C1.5 m
D> 1.5 m
56
The first stage of neutral process of sludge digestion, is__________________?
AAcid fermentation
BAcid regressio
CAlkaline fermentation
DNone of these
57
The self-cleansing velocity of water flowing through pipe lines, is___________________ ?
A2 metres/sec
B1 metre/sec
C0.5 metre/sec
D0.25 metre/sec
58
In very first stage of decomposition of the organic matter in sewage________________?
ANitrites are formed
BNitrates are formed
CCarbondioxide is formed
DAmmonia is formed
59
Design period of 40 to 50 years is adopted for_________________?
ABranch sewers
BMain sewers
CTrunk sewers
DAll the above
60
The disintegrating pump in which solid matter is broken up before passing out, is__________________?
ACentrifugal pump
BReciprocating pump
CPneumatic ejector
DNone of these