Which of the following is not a correct statement for a reciprocating pump?
1
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
2
Percentage of power saved by fitting air vessel is more in a double acting pump than in a single acting pump
3
The reciprocating pump is essentially a low speed machine and that speed is limited due to considerations of flow separation
4
The reciprocating pumps can handle only low viscosity liquids free from impurities