The function of an air vessel in a reciprocating pump is to
- AStore additional water
- BReduce pressure variationsCorrect
- CIncrease friction losses
- DReducing pipe length
Solution
Concept
Function of an air vessel
Step-by-step solution
1. A reciprocating pump delivers water in pulses. 2. The air vessel absorbs the pulsations and smooths the flow. 3. It reduces pressure variations and the possibility of separation and acceleration head.
Explanation
An air vessel on the suction and delivery sides works like a cushion. It makes the discharge more uniform, reduces the acceleration head and prevents shocks and vibrations in the pipe.
Shortcut
Air vessel = smoothing of flow and pressure.
Common mistake
Choosing "store additional water".
Correct answer: B) Reduce pressure variations