Civil Engineering - Hydraulics

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.

Answer: Option C

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.

Answer: Option A

Explanation:

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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.

Answer: Option A

Explanation:

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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.

Answer: Option E

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).

Answer: Option C

Explanation:

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