Pumps For Private Water Supply Systems

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Author:
iLLian
ID:
289146
Filename:
Pumps For Private Water Supply Systems
Updated:
2014-11-14 00:03:16
Tags:
Plumbing 4th Period
Folders:
Plumbing
Description:
Private Water Supply and Water Treatment
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  1. How is a pump able to lift water from a well?
    A) by creating a vortex that lifts the water
    B) by creating a partial vacuum in the pumping chamber
    C) by using the weight of a column of water to create a venturi action
    D) by lifting the water to the surface
    B) by creating a partial vacuum in the pumping chamber
    (this multiple choice question has been scrambled)
  2. How does the diameter of a well affect pumping capacity?
    A) by limiting the size of pump you can install
    B) by limiting the amount of water available in the well
    C) smaller diameter wells recover water more quickly than larger wells
    D) the size of the well determines the type of installation to be made
    A) by limiting the size of pump you can install
    (this multiple choice question has been scrambled)
  3. What is the maximum theoretical lift of a centrifugal pump used as a suction pump?
    A) 200 feet
    B) nearly unlimited
    C) approximately 22 feet
    D) close to 34 feet
    D) close to 34 feet
    (this multiple choice question has been scrambled)
  4. Why is a jet pump capable of greater suction lift than a centrifugal pump?
    A) Jet pumps can develop greater vacuum
    B) Jet pumps are larger than centrifugal pumps
    C) Jet pumps use larger pipe
    D) Jet pumps are better at developing negative pressure than centrifugal pumps
    D) Jet pumps are better at developing negative pressure than centrifugal pumps
    (this multiple choice question has been scrambled)
  5. What is the difference between a shallow well and a deep well?
    A) depth to the pumping level of the well
    B) deep wells use more casing
    C) shallow wells are most commonly bored wells
    D) type of pump used
    A) depth to the pumping level of the well
    (this multiple choice question has been scrambled)
  6. How does the altitude of a pump installation affect pump selection and installation methods?
    A) higher elevations do not have as much atmospheric pressure
    B) wells at lower elevations are deeper
    C) higher elevations are usually colder and installations must not freeze
    D) lower elevations usually have artesian wells
    A) higher elevations do not have as much atmospheric pressure
    (this multiple choice question has been scrambled)
  7. How does friction loss affect the use of a suction pump?
    A) by increasing the water that comes out into the pump impeller
    B) by limiting the type of pump that can be used
    C) by limiting the amount of pipe of a certain size that can be used
    D) by reducing the amount of work done by atmospheric pressure
    D) by reducing the amount of work done by atmospheric pressure
    (this multiple choice question has been scrambled)
  8. What condition may cause cavitation for a centrifugal pump?
    A) air leaks in the suction line
    B) impeller produces too much vacuum
    C) pump is working at maximum lift capacity
    D) friction loss caused by suction piping
    C) pump is working at maximum lift capacity
    (this multiple choice question has been scrambled)
  9. Why are centrifugal pump suction lines installed with positive grade from the well to the pump inlet?
    A) to keep positive pressure on the foot valve to ensure it will stay closed
    B) to allow water from the pump to drain back to the well to prevent freezing
    C) water flow to pump impeller is more laminar, helps to prevent cavitation
    D) for better air elimination when priming
    D) for better air elimination when priming
    (this multiple choice question has been scrambled)
  10. How may drawdown in a well affect an aquifer?
    A) drawdown can allow the aquifer to start releasing sand
    B) drawdown will flush all aquifers of clogging dirt particles
    C) the aquifer produces more water for the well due to hydraulic gradient
    D) the aquifer will collapse and starve the well of water
    A) drawdown can allow the aquifer to start releasing sand
    (this multiple choice question has been scrambled)
  11. Why should pump capacity be matched to well capacity?
    A) to allow the pump to work for as long as can be expected
    B) to prevent aquifer problems from developing
    C) to produce as much water from the well as possible
    D) to provide the consumer with the cleanest water possible
    B) to prevent aquifer problems from developing
    (this multiple choice question has been scrambled)
  12. When is a well considered to be a deep well?
    A) when the well is placed downhill from the house
    B) when a large amount of casing is used to make it
    C) when the well is provided with a well screeen
    D) when the well's pumping level is deeper than 24 feet
    D) when the well's pumping level is deeper than 24 feet
    (this multiple choice question has been scrambled)
  13. Why are some jet pumps called convertible jet pumps?
    a) the jet assembly can be removed from the pump and placed in a well
    b) the pump can be placed either above or below ground
    c) the pump motor can run on either of two voltages
    d) the pump motor can run on ac or dc current
    a) the jet assembly can be removed from the pump and placed in a well
  14. Which of these two piston pumps can be offset from the top of the well?
    a) deep well piston
    b) shallow well piston
    b) shallow well piston
  15. Which pumps may produce enough pressure to damage a pressure system>
    a) centrifugal and jet pumps used as suction pumps
    b) reciprocating and submersible pumps
    b) reciprocating and submersible pumps
  16. What are helical screw pumps usually used for?
    A) creating steady flow in pumped fluid
    B) pumping slurries and sludges
    C) high head applications
    D) for fluids with low viscosity
    B) pumping slurries and sludges
    (this multiple choice question has been scrambled)
  17. When a shut-off valve is placed on a tank tee for residential installation, which side of the tank tee should it be placed on?
    a) inlet of the tank tee
    b) outlet of the tank tee
    b) outlet of the tank tee
  18. What is the pressure output of a submersible pump impeller stage?
    A) 20 psi per stage
    B) 15 psi per stage
    C) 5 psi per stage
    D) 9 psi per stage
    D) 9 psi per stage
    (this multiple choice question has been scrambled)
  19. Why does a submersible pump require a check valve at its outlet?
    A) helps to prevent water from being pulled out of fertilizer tanks by suction
    B) to stop water from draining out of the drop pipe through the pump
    C) to allow the pump to start with backpressure on it, which prevents the pump from producing too much water from the well
    D) to prevent water hammer from the pump
    B) to stop water from draining out of the drop pipe through the pump
    (this multiple choice question has been scrambled)
  20. What types of impellers  are used on centrifugal pumps?
    A) closed, semi-closed, open
    B) vane, diffuser, and volute
    C) jet and submersible impellers
    D) closed, open
    A) closed, semi-closed, open
    (this multiple choice question has been scrambled)
  21. What device is used on the outlet of two-pipe jet pumps to allow the pump to produce the most water possible?
    A) a concentric reducer to increase outlet pipe size
    B) a pressure tank
    C) a flow-control fitting or valve
    D) a full-sized barbed fitting
    C) a flow-control fitting or valve
    (this multiple choice question has been scrambled)

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