A balloon lifting in air follows the following principle_____________________?

Question: Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds
[A].

4000

[B].

2100

[C].

1500

[D].

3000

Answer: Option B

Explanation:

No answer description available for this question.

Question: A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke’s law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity
[A].

same as that of A.

[B].

one fourth as that of A.

[C].

twice as that of A.

[D].

four times as that of A.

Answer: Option B

Explanation:

No answer description available for this question.

Question: With increase in pump speed, its NPSH requirement
[A].

decreases

[B].

increases

[C].

remains unaltered

[D].

can either increase or decrease ; depends on other factors

Answer: Option B

Explanation:

No answer description available for this question.

Question: A venturimeter can not be used for the direct measurement of
[A].

datum difference in the stretch of pipeflow

[B].

pressure difference in the flow throughpipeline.

[C].

friction loss in pipe flow.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.