Question

Slip of reciprocating pump becomes negative when

• A. Theoretical discharge is more than actual discharge
• B. Actual discharge is more than theoretical discharge
• C. Theoretical discharge is equal to actual discharge
• D. Pump is running at low speed

Answer 1

Answer:

B. Actual discharge is more than theoretical discharge

Reciprocating pumps use pressure to discharge a certain volume of liquid. The slip of a pump is the difference between theoretical and actual discharge due to leakage. Negative slip occurs when actual discharge is greater than theoretical discharge. Mathematically, negative slip equals Qact - Qth