Flashcards in Introduction To Pumps Deck (23)
All positive displacement pumps have pumping chambers
Positive displacement pumps cannot handle entrained air
Double-acting piston pumps discharge an equal amount of liquids on all strokes
Which one of the following reciprocating pumps can be allowed to run dry
Rotary pumps produce a smoother flow than reciprocating pumps
Which of the following pumps is not dynamic
What is the definition of absolute pressure
Gauge pressure plus atmospheric pressure
What is the equivalent head of oil when a pressure gauge reads 100 psi (the oil density is 56lb/ft3
As pressure is reduced, the boiling point of a liquid decreases?
What occurs in a pump when a liquid vaporizes in a closed system
A tank 20' high is full of brine,the RD of brine is 1.03. What would the reading be on a pressure gauge connected to a pipe leading from the bottom of the tank
What could cause cavitation to occur
An increase in liquid velocity
In a closed system, as the velocity energy increases,
The pressure energy decreases?
When the pump inlet is above the level of liquid in the supply reservoir, the pump has a suction head?
What source of energy is available to allow liquid to enter a pump with suction lift
Which pump component converts mechanical energy to kinetic energy?
What value must the NPSHa be for proper pump operation
Less than the NPSHa
Unless otherwise stated, pump performance curves are based on handling of what type of fluid
Pump curves are provided by the pump manufacturer
What does not contribute to friction loss through pipes
Increase in atmospheric pressure
What could be a possible cause for an increase in differential pressure across a strainer
The strainer needs to be cleaned