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.

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cLower critical Reynolds number has the value 2000 in pipe flow

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

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In a Sutro weir, the discharge is proportional to________________?


aH1/2

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bH3/2

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cH5/2

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dH

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View Answer H

Coefficient of contraction for an external cylindrical mouthpiece is_________________?


a1.00

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b0.855

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c0.7H

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d0.611

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View Answer 1.00

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


aslightly less

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bslightly more

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cnearly half

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dequal

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View Answer slightly less

Coefficient of velocity of venturimeter_________________?


ais independent of Reynolds number

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bdecreases with higher Reynolds number

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c is equal to the coefficient of discharge of venturimeter

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dnone of the above

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The discharge through a V- notch varies as______________?


aH1/2

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b H3’2

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cH5/2

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dH5’4 where H is head

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View Answer H5/2

Size of a venturimeter is specified by________________?


a pipe diameter

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b throat diameter

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cangle of diverging section

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dboth pipe diameter as well as throat diameter

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View Answer pipe diameter

Which of the following is used to measure the discharge ?


acurrent meter

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bventurimeter

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cpitot tube

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dhotwire anemometer

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View Answer venturimeter

Hot wire anemometer is used to measure_______________?


adischarge

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bvelocity of gas

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cpressure intensity of gas

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d pressure intensity of liquid

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View Answer velocity of gas

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


acan be zero

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b is never zero

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cis always zero

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d is independent of coordinates

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View Answer can be zero

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