Question

Which of the following is not a correct statement for a reciprocating pump?

• A. The flow from a reciprocating pump may be evened out by employing properly phased out multicylinder units or by fitting air vessels close to the cylinder
• B. Percentage of power saved by fitting air vessel is more in a double acting pump than in a single acting pump
• C. The reciprocating pump is essentially a low speed machine and that speed is limited due to considerations of flow separation
• D. The reciprocating pumps can handle only low viscosity liquids free from impurities

Answer 1

Answer:

B. Percentage of power saved by fitting air vessel is more in a double acting pump than in a single acting pump

Reciprocating pumps displace liquid with a piston or plunger. They are best suited for small capacities and high heads. Air vessels can be used to even out flow and save power, especially in single-acting pumps. The percentage of work saved in pipe friction by fitting air vessels in a single- acting pump is approximately 84.8% and in a double-acting pump, it is approximately 39.2%.