# Mechanical Engineering - Hydraulics and Fluid Mechanics

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

6.

The vacuum pressure can be measured with the help of a piezometer tube.

 A. True B. False

Explanation:

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7.

A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is

 A. 0.46 B. 0.64 C. 0.78 D. 0.87

Explanation:

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8.

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2 where m is equal to

 A. B. C. D.

Explanation:

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9.

A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?

 A. The pressure on the wall at the liquid level is minimum. B. The pressure on the bottom of the wall is maximum. C. The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum D. The pressure on the bottom of the wall is zero.

Explanation:

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10.

Water is a __________ fluid.

 A. real B. ideal C. newtonian D. non-newtonian