Mechanical Engineering - Hydraulics and Fluid Mechanics

1. 

The specific gravity of an oil whose specific weight is 7.85 kN/m3, is

A. 0.8
B. 1
C. 1.2
D. 1.6

Answer: Option A

Explanation:

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2. 

The body will float if the force of buoyancy is __________ the weight of the liquid displaced.

A. equal to
B. less than
C. more than

Answer: Option C

Explanation:

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3. 

According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)

A.
B.
C.
D.

Answer: Option A

Explanation:

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4. 

The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called

A. density of liquid
B. specific gravity of liquid
C. compressibility of liquid
D. surface tension of liquid

Answer: Option B

Explanation:

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5. 

The velocity of liquid flowing through an orifice varies with the available head of the liquid.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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