# Mechanical Engineering - Hydraulics and Fluid Mechanics

### Exercise :: Hydraulics and Fluid Mechanics - Section 7

46.

The specific gravity of water is taken as

 A. 0.001 B. 0.01 C. 0.1 D. 1

Answer: Option D

Explanation:

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47.

A pitot tube is used to measure the

 A. velocity of flow at the required point in a pipe B. pressure difference between two points in a pipe C. total pressure of liquid flowing in a pipe D. discharge through a pipe

Answer: Option A

Explanation:

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48.

The total head of a liquid particle in motion is equal to

 A. pressure head + kinetic head + potential head B. pressure head - (kinetic head + potential head) C. potential head - (pressure head + kinetic head) D. kinetic head - (pressure head + potential head)

Answer: Option A

Explanation:

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49.

An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.

 A. free B. partially C. full

Answer: Option C

Explanation:

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50.

The reciprocal of Euler's number is called Newton number.

 A. Yes B. No

Answer: Option A

Explanation:

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