Which of the following is true about Rotary pumps?

1.	Which of the following is true about Rotary pumps?
A.	These consist of gear pumps which create high pressures
B.	In internal gear pumps, a pinion gear is driven by a motor which is eccentric and the ring gear is co-axial and is driven by the pinion gear
C.	In Spur gears, vacuum created allows liquid to flow from suction to delivery line
D.	All of the mentioned
Answer» E.

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Which of the following is true about Rotary pumps?

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