During combustion of gaseous fuels, deficiency of air

Question: In a free vortex, the
[A].

velocity changes linearly with radial distance.

[B].

flow is necessarily rotational.

[C].

radial component of velocity is same everywhere.

[D].

stream lines are not circular.

Answer: Option A

Explanation:

No answer description available for this question.

Question: For the production of very high vacuum, a __________ pump is normally used.
[A].

diffusion

[B].

centrifugal

[C].

jet ejector

[D].

piston

Answer: Option A

Explanation:

No answer description available for this question.