A reciprocating pump is most suitable when
- AHigh discharge and low pressure are required
- BHigh pressure and low discharge are requiredCorrect
- CVery high discharge and moderate pressure is required
- DFluid contains abrasive solids
Solution
Concept
Operating domain of positive displacement reciprocating pumps
Formula
Q = L × A × N / 60
Step-by-step solution
1. Reciprocating pumps are positive displacement pumps where a piston moves inside a cylinder to displace fluid. 2. Because cylinder walls and valves can withstand extremely high fluid pressures, they can generate very high heads. 3. However, cylinder displacement volume per stroke is relatively small, resulting in low discharge capacity. 4. Hence, reciprocating pumps are most suitable for high pressure and low discharge applications. Answer: B
Explanation
A reciprocating pump is a positive displacement pump that uses a reciprocating piston or plunger to displace fluid against resistance. Because of cylinder pressure containment capabilities and positive displacement action, it is uniquely suited for operating conditions requiring high delivery heads and low flow rates.
Why the other options are wrong
A) High discharge and low pressure requirements are met by centrifugal or axial-flow pumps. C) Very high discharge with moderate pressure is handled by centrifugal pumps. D) Abrasive solids cause severe erosion and damage to reciprocating piston seals and valves.
Shortcut
Reciprocating pump = High pressure and low discharge (Positive displacement).
Common mistake
Choosing high discharge and low pressure, which applies to centrifugal or axial-flow pumps.
Correct answer: B) High pressure and low discharge are required