Mechanical Engineering - Hydraulics and Fluid Mechanics

1. 

A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)

A.
B.
C.
D.

Answer: Option C

Explanation:

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2. 

An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.

A. less than twice
B. more than twice
C. less than three times
D. more than three times

Answer: Option C

Explanation:

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3. 

The discharge over a rectangular notch is

A. inversely proportional to H3/2
B. directly proportional to H3/2
C. inversely proportional to H5/2
D. directly proportional to H5/2

Answer: Option B

Explanation:

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4. 

The volume of a fluid __________ as the pressure increases.

A. remains same
B. decreases
C. increases

Answer: Option B

Explanation:

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5. 

The pressure of the liquid flowing through the divergent portion of a venturimeter

A. remains constant
B. increases
C. decreases
D. depends upon mass of liquid

Answer: Option C

Explanation:

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