302. If the pressure at the inlet of a pipe is 90 kg/cm h and the pressure drop over the pipe line is 10 kg/cm2, the efficiency of transmission is
A.0.666
B.0.777
C.0.555
D.0.888

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303. The total frictional resistance to fluid flow is independent of
A.Density of fluid
B.Velocity
C.Pressure
D.Surface roughness

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304. The velocity of fluid particle at the centre of pipe section is
A.Zero
B.Minimum
C.Maximum
D.Average of full section

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305. Uniform flow occurs when
A.At every point the velocity vector is identical, in magnitude and direction, for any given instant
B.The flow is steady
C.Discharge through a pipe is constant
D.Conditions do not change with time at any point

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306. Which of the following represents steady uniform flow
A.Flow through an expanding tube at an increasing rate
B.Flow through an expanding tube at constant rate
C.Flow through a long pipe at decreasing rate
D.Flow through a long pipe at constant rate

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307. In the case of turbulent flow
A.It occurs in open channel
B.Shear stresses are more compared to laminar flow.
C.Velocity at boundary is zero
D.It is not possible to measure flow

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308. For a siphon to work satisfactorily, the minimum pressure in the pipe as compared to vapour pressure of liquid should be
A.More
B.Less
C.Equal
D.Could be anything

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