Hydraulics and Fluid Mechanics

Question: A structure used to dam up a stream or river over which the water flows is called
[A].

orifice

[B].

notch

[C].

weir

[D].

dam

Answer: Option C

Explanation:

No answer description available for this question.

Question: An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch.
[A].

1%

[B].

1.5%

[C].

2%

[D].

2.5%

Answer: Option D

Explanation:

No answer description available for this question.

Question: An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch,
[A].

1%

[B].

1.5%

[C].

2%

[D].

2.5%

Answer: Option D

Explanation:

No answer description available for this question.

Question: If the coefficient of discharge is 0.6, then the discharge over a right angled notch is
[A].

0.417 H5/2

[B].

1.417 H5/2

[C].

4.171 H5/2

[D].

7.141 H5/2

Answer: Option B

Explanation:

No answer description available for this question.

Question: A notch is used to measure __________ of liquids.
[A].

pressure

[B].

discharge

[C].

velocity

[D].

volume

Answer: Option B

Explanation:

No answer description available for this question.

Question: A notch is, usually, made of a metallic plate.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called
[A].

weir

[B].

notch

[C].

orifice

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.
[A].

less than

[B].

more than

Answer: Option A

Explanation:

No answer description available for this question.

Question: In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.
[A].

less than

[B].

more than

Answer: Option A

Explanation:

No answer description available for this question.