Chemical Engineering - Fluid Mechanics

31. 

Pick out the wrong statement.

A. In a static mass of liquid, the pressure at a point is the same for all liquids.
B. Pressure decreases exponentially with elevation in an isothermal atmosphere.
C. Atmospheric pressure = absolute pressure-gage pressure.
D. As per Pascal's law, the pressure at a point in a static or uniformly moving fluid is equal in all directions.

Answer: Option A

Explanation:

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32. 

The velocity profile for a Bingham plastic fluid flowing (under laminar conditions) in a pipe is

A. parabolic
B. flat
C. flat near the wall and parabolic in the middle
D. parabolic near the wall and flat in the middle.

Answer: Option D

Explanation:

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33. 

Fanning friction factor for laminar flow of fluid in a circular pipe is

A. not a function of the roughness of pipe wall.
B. inversely proportional to Reynolds number.
C. both (a) & (b).
D. neither (a) nor (b).

Answer: Option C

Explanation:

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34. 

Mach number is the ratio of the speed of the

A. fluid to that of the light.
B. light to that of the fluid.
C. fluid to that of the sound.
D. sound to that of the fluid.

Answer: Option C

Explanation:

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35. 

A piezometer opening measures the __________ fluid pressure.

A. static
B. undisturbed
C. total
D. dynamic

Answer: Option B

Explanation:

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