Two dimensional flow occurs when

Civil Engineering : Hydraulics - Quiz(MCQ)

the direction and magnitude of the velocity at all points are identical

the magnitude and direction of the velocity do not change from point to point in the fluid

the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

Correct Answer : the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

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An orifice is taken as large if

(Hâ‚‚ - Hâ‚) > H

(Hâ‚‚ - Hâ‚) > H/2

(Hâ‚‚ - Hâ‚) > H/4

(Hâ‚‚ - Hâ‚) > H/3

Correct Answer : Option (D) : (Hâ‚‚ - Hâ‚) > H/3

A closed cylindrical vessel of 100 cm diameter and 200 cm high is completely filled with a liquid (sp. weight 1600 kg/m3) when rotated about its vertical axis at 100 r.p.m. The total pressure on its lid, is

459 kg

549 kg

945 kg

954 kg

Correct Answer : Option (D) : 954 kg

An error of 1% in measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to

1.5%

2.0%

2.5%

4.5%

Correct Answer : Option (C) : 2.5%

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