🏗️Civil Engineering MCQs
Civil Engineering MCQs
479 MCQs191
An inverted siphon is designed generally for____________________?
AOne pipe
BTwo pipes
CThree pipes
DFour pipes
192
Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter______________________?
ALess than 0.01 mm
BLess than 0.05 mm
CLess than 0.1 mm
DGreater than 0.1 mm
193
In sewers designed with self cleansing velocity________________?
AThe bottom is silted
BThe bottom is scoured
CBoth silting and scouring occur at the bottom
DNeither silting nor scouring occurs at the bottom
194
The spacing of bars of perforations of fine screens used for the treatment of sewage, is_______________?
A2 to 3 mm
B3 to 5 mm
C5 to 8 mm
D8 to 10 mm
195
The rate of accumulation of sludge per person per year, is_______________________?
A10 litres
B15 litres
C20 litres
D25 litres
196
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,______________?
AIs only provided
BIs doubled
CIs trebled
DIs not enough
197
The flow velocity in detritus tanks is________________?
A0.05 m/sec
B0.09 m/sec
C1.25 m/sec
DNone of these
198
The water carried sewerage system removes__________________?
ADomestic sewage
BIndustrial sewage
CStorm sewage
DAll the above
199
The asbestos cement pipes are generally laid___________________?
AHorizontally
BVertically
CAt an angle of 30°
DAt an angle of 60°
200
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________?
ACarbondioxide gas
BHydrogen sulphide gas
CMethane gas
DPetrol vapours