Civil Engineering MCQs

Page No. 189

Which of the following statements is correct ?


aLower critical Reynolds number is of no practical significance in pipe flow problems.


b Upper critical Reynolds number is significant in pipe flow problems.


cLower critical Reynolds number has the value 2000 in pipe flow


dUpper critical Reynolds number is the number at which turbulent flow changes to laminar flow



In a Sutro weir, the discharge is proportional to________________?


aH1/2


bH3/2


cH5/2


dH


View Answer H

Coefficient of contraction for an external cylindrical mouthpiece is_________________?


a1.00


b0.855


c0.7H


d0.611


View Answer 1.00

Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is__________________?


aslightly less


bslightly more


cnearly half


dequal


View Answer slightly less

Coefficient of velocity of venturimeter_________________?


ais independent of Reynolds number


bdecreases with higher Reynolds number


c is equal to the coefficient of discharge of venturimeter


dnone of the above



The discharge through a V- notch varies as______________?


aH1/2


b H3’2


cH5/2


dH5’4 where H is head


View Answer H5/2

Size of a venturimeter is specified by________________?


a pipe diameter


b throat diameter


cangle of diverging section


dboth pipe diameter as well as throat diameter


View Answer pipe diameter

Which of the following is used to measure the discharge ?


acurrent meter


bventurimeter


cpitot tube


dhotwire anemometer


View Answer venturimeter

Hot wire anemometer is used to measure_______________?


adischarge


bvelocity of gas


cpressure intensity of gas


d pressure intensity of liquid


View Answer velocity of gas

In steady flow of a fluid, the total accele ration of any fluid particle______________?


acan be zero


b is never zero


cis always zero


d is independent of coordinates


View Answer can be zero

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