Civil Engineering MCQs

Page No. 11

Operation of McLeod gauge used for low pressure measurement is based on the principle of_____________________?


agas law

✖


b Boyle’s law

✓


cCharle’s law

✖


dPascal’s law

✖


View Answer Boyle’s law

Pressure of the order of 10″‘ torr can be measured by_______________ ?


aBourdon tube

✖


bPirani Gauge

✖


cmicro-manometer

✖


d ionisastion gauge

✓


View Answer ionisastion gauge

Newton’s law of viscosity is a relationship between________________?


a shear stress anctthejiate of angular distortion

✓


bshear stress and viscosity

✖


c shear stress, velocity and viscosity

✖


dpressure, velocity and viscosity

✖



An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of_________________?


a 1

✖


b1.2

✖


c 0.8

✖


d0.75

✓


View Answer 0.75

The atmospheric pressure with rise in altitude decreases____________________?


alinearly

✖


bfirst slowly and then steeply

✓


cfirst steeply and then gradually

✖


dunpredictable

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Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_______________?


aforce of adhesion

✖


bforce of cohesion

✓


c force of friction

✖


dforce of diffusion

✖


View Answer force of cohesion

Surface energy per unit area of a surface is numerically equal to___________________?


aatmospheric pressure

✖


bsurface tension

✓


cforce of adhesion

✖


dforce of cohesion

✖


View Answer surface tension

The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately____________________?


a 1 mm

✖


b 5 mm

✖


c10 mm

✖


d30 mm

✓


View Answer 30 mm

The difference of pressure between the inside and outside of a liquid drop is________________?


ap = Txr

✖


bp = T/r

✖


c p = T/2r

✖


dp = 2T/r

✓


View Answer p = 2T/r

To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than_______________?


a2.4 m above the hydraulic gradient

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b6.4 m above the hydraulic gradient

✓


c10.0 m above the hydraulic gradient

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d 5.0 above the hydraulic gradient

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