Mechanical Engineering - Hydraulics and Fluid Mechanics

1. 

The hydraulic mean depth or the hydraulic radius is the ratio of

A. area of flow and wetted perimeter
B. wetted perimeter and diameter of pipe
C. velocity of flow and area of flow
D. none of these

Answer: Option A

Explanation:

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2. 

The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as

A. path line
B. stream line
C. steak line
D. potential line

Answer: Option B

Explanation:

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3. 

A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

A.
B.
C.
D.

Answer: Option C

Explanation:

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4. 

Stoke is the unit of

A. kinematic viscosity in C. G. S. units
B. kinematic viscosity in M. K. S. units
C. dynamic viscosity in M. K. S. units
D. dynamic viscosity in S. I. units

Answer: Option A

Explanation:

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5. 

One poise is equal to

A. 0.1 N-s/m2
B. 1 N-s/m2
C. 10 N-s/m2
D. 100 N-s/m2

Answer: Option A

Explanation:

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