Hydraulics - Civil Engineering Questions and Answers

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The ratio of the percentagge error in the discharge and percentage error in the measurement of head over a triangular notch, is

A.

2/3

B.

3/2

C.

2/5

D.

5/2

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The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called

A.

Euler number

B.

Frode number

C.

Reynold number

D.

Weber number.

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A rectangular channel 6 m wide and 3 m deep and having a bed slope as 1 in 2000 is running full. If Chezy's constant C = 54.8, pick up the correct specification of the channel from the following :

A.

hydraulic mean depth = 1.5 m

B.

Velocity of flow = 1.5 m/sec

C.

Rate of flow = 27 m³/sec

D.

All the above.

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Non-over flow double curvature concrete arch, is provided in

A.

Bhakra dam

B.

Hirakund dam

C.

Nagarjuna Sagar dam

D.

Idukki dam.

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For the most economical trapezoidal open channel,

A.

half of the top width must be equal to one of the sloping sides

B.

the hydraulic mean depth must be equal to half the depth of flow

C.

the semicircle drawn with top width as diameter must touch the three sides of the channel

D.

All of these.

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Hydraulic ram is a device

A.

for lifting water without an electric motor

B.

for accelerating water flow

C.

for lifting heavy loads

D.

none of these.

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Gauge pressure is

A.

absolute pressure - atmospheric pressure

B.

absolute pressure + atmospheric pressure

C.

atmospheric pressure - absolute pressure

D.

none of these.

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The mouth piece shown in the below figure is generally known as

A.

Internal mouth piece

B.

Re-entrant mouth piece

C.

Borda's mouth piece

D.

All the above.

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If S is the length of the crest, H is the height of water source of a weir whose length is L and discharge is Q m³/sec, the velocity of approach V_d is

A.

\(\sqrt{2gH}\)

B.

\(\frac { Q } { L(H-L) } \)

C.

\(\frac { Q } { L(H+S) } \)

D.

\(\frac { L(H+S )} { Q } \)

E.

none of these.