# Mechanical Engineering - Hydraulics and Fluid Mechanics

### Exercise :: Hydraulics and Fluid Mechanics - Section 5

11.

The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)

 A. K.ρ B. K/ρ C. ρ/K D. K.ρ

Explanation:

No answer description available for this question. Let us discuss.

12.

The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

 A. w B. wh C. w/h D. h/w

Explanation:

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13.

The hydraulic gradient line is always parallel to the centre line of the pipe.

 A. Correct B. Incorrect

Explanation:

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14.

Barometer is used to measure

 A. velocity of liquid B. atmospheric pressure C. pressure in pipes and channels D. difference of pressure between two points in a pipe

Explanation:

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15.

A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end.

 A. Correct B. Incorrect