Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump?

Increasing the impeller speed and the volute area

Increasing the number of vanes in the impeller

Mounting of two or more impellers in series on a single shaft

Which of the following options will facilitate the achievement of a v

1.	Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump?
A.	Increasing the impeller speed and the volute area
B.	Increasing the number of vanes in the impeller
C.	Mounting of two or more impellers in series on a single shaft
D.	Either of A, B or C
Answer» D. Either of A, B or C