Civil Engineering - Hydraulics

Exercise :: Hydraulics - Section 5

1.

Water flows through a convergent mouthpiece of diameter 4 cm at convergence under a head of 3 metres. If the maximum vacuum pressure is 9 metres of water, the maximum diameter of divergence, to aviod separation of flow, is

 A. 4 cm B. 6 cm C. 2 cm D. 23 cm.

Explanation:

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2.

An ideal fluid

 A. is frictionless and incompressible B. obeys Newton's law of velocity C. is similar to gas D. is very viscous.

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3.

In C.G.S. system the units of kinematic viscosity, is

 A. stoke B. poise C. Newton D. none of these.

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4.

A triangular notch is preferred to a rectangular notch because

 A. only one reading is required B. its formula is simple to remember C. it gives more accurate results for low discharge D. it measures a wide range of flows accurately E. all the above.

Explanation:

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5.

In case of laminar flow through a circular pipe,

 A. momentum correction factor is 1.33 B. energy correction factor is 2.00 C. both (a) and (b) D. Neither (a) nor (b).