Civil Engineering MCQs

Page No. 39

Disposal to sewage in large cities, is done in__________________?


aIrrigation


bDilution


cOxidation


dPurification


View Answer Dilution

The dimensions of a rectangular settling tank are: length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is_____________________?


a204 cu.m


b208 cu.m


c212 cu.m


d216 cu.m


View Answer 216 cu.m

Assertion A. : Discharging the effluents from the oxidation ponds just up stream of lakes or reservoirs is undesirable. Reason (R) : The discharged algae get settled in the reservoirs and cause anaerobic decomposition and other water qualities_________________?


aBoth A and R are true and R is the correct explanation of A


b Both A and R are true but R is not a correct explanation of A


cA is true but R is false


dA is false but R is true



The algae dies out in the zone of_____________________?


aDegradation


bActive decomposition


cRecovery


dCleaner water


View Answer Degradation

For design purposes, the normal rate of infiltration of ground water into the sewer, is___________________?


a500 litres/km/cm


b1000 litres/km/cm


c1500 litres/km/cm


d2000 litres/km/cm


View Answer 2000 litres/km/cm

The drop man holes are generally provided in sewers for____________________?


aIndustrial areas


b Large town ships


cHilly town ships


dCities in plains


View Answer Hilly town ships

A rain sanitary sewer is constructed to carry_________________ ?


aSanitary sewage


bStorm sewage


cSurface water


dGround water


View Answer Sanitary sewage

For house drainage minimum gradient is__________________?


a1 in 60


b1 in 80


c1 in 10


d1 in 400


View Answer 1 in 60

A rainfall may be classified as acidic if its pH value is less or equal to________________?


a6


b7


c 5


d6.5


View Answer 5

If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is___________________?


aD


b1.25 D


c 1.5 D


d1.75 D


View Answer 1.5 D

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