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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