300) A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.

Answer is:

2H/3

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301) A nozzle is generally made of

Answer is:

convergent shape

302) The unit of surface tension is

Answer is:

N/m

Explanation:

Surface tension is the property of a liquid which enables it to resist tensile stress. Surface tension is denoted by σ (sigma). Surface tension is expressed in N/m (Newton/meter).

303) A notch is, usually, made of a metallic plate.

Answer is:

Correct

304) 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.

Answer is:

Wrong

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