Hydraulics and fluid mechanics MCQ with Answers

Hydraulics and fluid mechanics MCQ with Answers

86) 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.

Answer is:

Correct

87) In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.

Answer is:

one-fourth

88) Viscous force is the __________ of shear stress due to viscosity and cross-sectionar area of flow.

Answer is:

product

89) The density of air is same at different heights.

Answer is:

Incorrect

90) The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surf

Answer is:

wAx

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