Hydraulics and Fluid Mechanics

Question: An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.
[A].

less than twice

[B].

more than twice

[C].

less than three times

[D].

more than three times

Answer: Option C

Explanation:

No answer description available for this question.

Question: An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.
[A].

free

[B].

partially

[C].

full

Answer: Option C

Explanation:

No answer description available for this question.

Question: In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free.
[A].

True

[B].

False

Answer: Option B

Explanation:

No answer description available for this question.

Question: In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be
[A].

running full

[B].

running free

[C].

partially running full

[D].

partially running free

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.
[A].

equal to

[B].

one-fourth

[C].

one-third

[D].

one-half

Answer: Option B

Explanation:

No answer description available for this question.

Question: A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
[A].

notch

[B].

weir

[C].

mouthpiece

[D].

nozzle

Answer: Option C

Explanation:

No answer description available for this question.

Question: A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is
[A].

[B].

[C].

[D].

Answer: Option C

Explanation:

No answer description available for this question.

Question: A hemispherical tank of radius (R) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to lower the level of liquid from (H1) to (H2) will be
[A].

[B].

[C].

[D].

none of the above

Answer: Option C

Explanation:

No answer description available for this question.

Question: A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

Question: A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be
[A].

[B].

[C].

[D].

Answer: Option C

Explanation:

No answer description available for this question.