Mechanical Engineering - Hydraulics and Fluid Mechanics

16. 

The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)

A. wH/2
B. wH
C. wH2/2
D. wH2/4

Answer: Option C

Explanation:

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17. 

Froude's number is the ratio of inertia force to

A. pressure force
B. elastic force
C. gravity force
D. surface tension force

Answer: Option C

Explanation:

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18. 

According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)

A. A m x i
B. C m x i
C. AC m x i
D. mi A x C

Answer: Option C

Explanation:

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19. 

When a liquid is flowing through a pipe, the velocity of the liquid is

A. maximum at the centre and minimum near the walls
B. minimum at the centre and maximum near the walls
C. zero at the centre and maximum near the walls
D. maximum at the centre and zero near the walls

Answer: Option A

Explanation:

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20. 

The pressure of fluid due to hammer blow is

A. directly proportional to density of fluid
B. inversely proportional to density of fluid
C. directly proportional to (density)1/2 of fluid
D. inversely proportional to (density)1/2 of fluid

Answer: Option C

Explanation:

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