1.

Which of the following statements regarding hydraulic pumps are correct ? 1. The gear pump consists of two close-meshing gear wheels which rotate in opposite directions. 2. In vane pump, as the rotor rotates, the vanes follow the contours of the casing. 3. The leakage is more in vane pump compared to gear pump. (a) 1, 2 and 3 (b) 1 and 2 only (c) 1 and 3 only (d) 2 and 3 only

Answer»

(b) 1 and 2 only

The volumetric efficiency of vane pump (upto 95%) is higher compared to gear pump.



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