# Mechanical Engineering - Hydraulics and Fluid Mechanics

### Exercise :: Hydraulics and Fluid Mechanics - Section 2

11.

Reynold's number is the ratio of inertia force to

 A. pressure force B. elastic force C. gravity force D. viscous force

Answer: Option D

Explanation:

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12.

The unit of dynamic viscosity in S.I. units is

 A. N-m/s2 B. N-s/m2 C. poise D. stoke

Answer: Option B

Explanation:

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13.

Bulk modulus of a fluid __________ as the pressure increases.

 A. remains same B. decreases C. increases

Answer: Option C

Explanation:

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14.

The hydraulic gradient line may be above or below the centre line of the pipe.

 A. True B. False

Answer: Option B

Explanation:

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15.

A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is

 A. 2.89 kN B. 8.29 kN C. 9.28 kN D. 28.9 kN

Answer: Option B

Explanation:

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