Civil Engineering MCQs

Page No. 181

The most common cause of acidity in water is_______________?


acarbon dioxide


b oxygen


chydrogen


dnitrogen


View Answer carbon dioxide

The polluted water is one which_______________?


acontains pathogenic bacteria


bconsists of undesirable substances rendering it unfit for drinking and domestic use


c is safe and suitable for drinking and domestic use


d is contaminated



As compared to shallow-wells, deep wells have______________?


amore depth


bless depth


cmore discharge


dless discharge


View Answer more discharge

The type of valve, which is provided on the suction pipe in a tube-well, is____________?


aair relief valve


breflux valve


c pressure relief valve


dsluice valve


View Answer reflux valve

The depression of water table in a well due to pumping will be maximum_______________?


aat a distance R from the well


bclose to the well


c at a distance R/2 from the well


dnone of the above



The distribution mains are designed for________________?


amaximum daily demand


bmaximum hourly demand


caverage daily demand


dmaximum hourly demand on maxi¬mum day



The hourly variation factor is usually taken as______________?


a1.5


b 1.8


c2.0


d 2.7


View Answer 1.5

Select the correct statement?


a The absolute roughness of a pipe de-creases with time


b A pipe becomes smooth after using for long time


cThe friction factor decreases with time


dThe absolute roughness increases with time



The unit of kinematic viscosity is_______________?


a gm/cm-sec2


b dyne-sec/cm2


c gm/cm2-sec


dcm2/sec


View Answer cm2/sec

Pascal-second is the unit of______________?


a pressure


bkinematic viscosity


c dynamic viscosity


dsurface tension


View Answer dynamic viscosity

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