Civil Engineering MCQs

Page No. 46

Lead acetate test in sewer manhole is done to test the presence of ____________________?


aMethane gas


bHydrogen sulphide


cCarbondioxide gas


dDiesel vapours


View Answer Hydrogen sulphide

Setting out the alignments of sewers may start from__________________?


aCity


bOut-fall


cTail end


dAny point


View Answer Tail end

Pick up the correct statement from the following ?


aMaximum daily flow = 2 times the average daily flow


bMaximum daily flow = average daily flow


cSewers are designed for minimum permissible velocity at minimum flow


dAll the above


View Answer All the above

The most widely used pump for lifting sewage is_________________?


aCentrifugal pump


bReciprocating pump


cPneumatic ejector


dAir pressure pump


View Answer Centrifugal pump

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


View Answer 2.5 to 3.0 m/sec

Primary treatment of sewage consists of removal of__________________?


aLarge suspended organic solids


bOil and grease


cSand and girt


dFloating materials



The bottom of the sewage inlet chamber of septic tanks, is provided an outward slope_________________?


a1 in 5


b1 in 10


c1 in 15


d1 in 20


View Answer 1 in 10

Which one of the following part of human body withstands minimum radiation ?


aThyroid


bKidneys


cEyes


dOvaries/testis


View Answer Ovaries/testis

The intensity of rain is expressed in________________?


acm/minute


bcm/hour


c cm/day


d None of these


View Answer cm/hour

Inter-distance between ventilation columns in a sewer line is kept__________________?


a 25 to 50 m


b 50 m to 100 m


c100 m to 150 m


d150 m to 300 m


View Answer 150 m to 300 m

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