309. Water hanuner in pipes occurs due to

A.Someone hitting the pipe with a hammer

B.Sudden change in the velocity of any flowing fluid

C.Heavy pressurisation of pipe

D.Obstruction in pipe

310. Which of the following represents unsteady non-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

311. Fire hose nozzle is generally made of

A.Divergent shape

B.Convergent shape

C.Convergent-divergent shape

D.Cylindrical shape

312. Chezy's equation is used to determine

A.Velocity of flow in open channel

B.Velocity of flow in pipe

C.Flow over weirs

D.Discharge through notch

313. Equation of continuity results from the principal of conservation of

A.Energy

B.Flow

C.Mass

D.Momentum

314. Hydraulic grade line for any flow ,system as compared to energy line is

A.Above

B.Below

C.At same level

D.May be below or above depending upon velocity of flow

315. Which curve in Fig. 8.4 shows the correct nature of distribution of stress at a cross section in a horizontal circular pipe under steady flow conditions ?

A.Curve A

B.Curve B

C.Curve C

D.Curve D

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