Module A Flashcards
Which of the following pumps are dynamic:
- Centrifugal
- Axial
- Reciprocating
- Mixed-flow
- Centrifugal
- Axial
- Mixed-flow
What is absolute pressure?
Gauge pressure plus atmospheric pressure
As pressure is reduced, the boiling point of a liquid ___________
Decreases
What happens when a liquid vaporizes in a closed system?
Cavitation can occur
A tank 20 ft high is full of brine. The S.G. 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?
8.9 psi
When the pump inlet is ____ the level of liquid in the supply reservoir, the pump has a suction head.
below
What source of energy is available to allow liquid to enter a pump with suction lift?
Atmospheric Pressure
__________ is the component that converts mechanical energy into kinetic energy.
Impeller
The NPSHR must be _________ the NPSHA
Less than
A pump converts mechanical energy into ___________
Hydraulic Energy
Unless otherwise stated, pump performance _____ are based on handling cold water
curves
What are the four factors that affect friction loss thorough a pipe?
- Type of Pipe
- Length of pipe
- diameter of pipe
- type of fluid flowing through the pipe
The flow produced by a pump varies ___________ with the impeller diameter
directly
If the impeller diameter in a pump is increased in a pump, the _________ will increase at an equal rate
Flow
Unless otherwise stated, pump performance curves are based on handling _____________
cold water