While starting a centrifugal pump, its delivery valve should be kept

Question: While starting a centrifugal pump, its delivery valve should be kept
[A].

opened.

[B].

closed.

[C].

either opened or closed ; it does not make any difference.

[D].

either opened or closed; depending on the fluid viscosity.

Answer: Option B

Explanation:

No answer description available for this question.