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52 Cards in this Set
- Front
- Back
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How does a pump work |
By creating a negative pressure on the inlet side of the pump which allows atmospheric pressure to force water into the suction side which creates a positive pressure on the outlet side of the pump and delivers the water to the point of use |
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What is atmospheric pressure at sea level |
14.7 PSI |
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Good quality pump can pull water up to |
25ft at sea level |
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If not at sea level what do you do |
For every thousand feet of elevation water can be sucked about 1 foot less |
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How much water is needed per person on the daily basis |
60 US gallons |
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Why does the amount of water needed by Hogs vary so greatly |
Gender size differences and lactating status create varying demands |
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What is the rule of thumb for sizing sprinkler lines based on National Fire Protection standard 13d |
Three-quarter inch to supply one sprinkler 1in to supply to sprinkler heads |
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How is freeze protection provided for a cistern that cannot be very deeply enough |
By placing insulation sustainable for the purpose over the tank |
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Why does a buried cistern require a vent line for the cistern |
Event allows the cistern to operate under atmospheric pressure conditions |
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After an uncoated concrete cistern is filled You observe the water level has lowered in the cistern even though no one has used any water what caused this |
Uncoated concrete is porous and will allow water to soak into it lowering the cistern water level |
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Why is the vent terminal of the cistern range to point back towards the ground |
So precipitation cannot enter the vent |
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Why is drinking water with no additional treatment rarely collected directly from Lakes |
The water may appear to be clean but could be contaminated by animals using the Watershed for the lake |
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Why are water intakes placed at various levels in a lake |
To allow an operator to collect the cleanest possible water from a lake during periods of the year when the lake turns over due to temperature differential |
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How are Springs classified into three different categories |
By how the water from the spring comes to the ground surface |
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When placing an impoundment box over spring to provide for water collection how was the spring openings prepared |
With as little disturbance as possible to the opening |
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What factors influence water's ability to dissolve soluble material |
Solubility of the material time of contact pH of water temperature water |
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How does the well screen filter material out of water coming from an unconsolidated aquafire |
The screen realize on bridging of larger materials near the screen to filter fine or materials |
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What is well development |
The cleaning of an alkyl Fire by a drilling rig to ensure the well water is as clean as possible |
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How are wells generally sorted as to their type |
By the type of equipment that was used to make them |
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What is the typical setting on a pressure switch for residential applications |
20/40 PSI for any application you should always have 20 psi differential |
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When setting up a bladder tank what should the differential be in regards to the pressure switch |
3 to 5 PSI |
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What must be installed with a positive displacement pump |
A prv |
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When adding impellers to a pump it roughly boosts it by |
9 PSI |
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What length is considered to be a deep well |
25 feet and deeper |
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Pressure tanks that don't have a bladder what is the air to water ratio |
2/3 water 1/3air |
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When using a jet pump for deep well |
It'll be two pipes the max depth is 180 ft will still be 100% efficient |
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How do you tell if a jet pump can be used for deep Wells |
It has bolt holes so you can take pump casting and put it into the well |
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How is a pump able to lift water from a well |
By creating a partial vaccuum in the pumping chamber |
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How does the diameter of a well affect pumping capacity |
By limiting the size of pump you can install |
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What is the maximum theoretical lift of a centrifugal pump used as a suction pump |
Close to 34 ft |
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Why is a jet pump capable of Greater suction lift than a centrifugal pump |
Jet pumps are better at developing negative pressure than centrifugal pumps |
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What is the differences between a shallow well and a deep well |
Depth to the pumping level of well |
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How does the altitude of a pump installation affect pump selection and installation methods |
Higher elevations do not have as much atmospheric pressure |
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How does friction loss affect the use of the suction pump |
By reducing the amount of work done by atmospheric pressure |
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What conditions may cause cavitation for a centrifugal pump |
Pump is working at maximum lift capacity |
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Why are centrifugal pump suction lines installed with positive grade from the well to the pump Inlet |
For better air elimination when priming |
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How many drawdown in a well affect an aquafire |
Drawdown can allow the aquafire to start releasing sand |
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Why should pump capacity be matched well capacity |
Prevent aquafire problems from developing |
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When is well considered to be a deep well |
When the wells pumping level is deeper than 24 ft |
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Why are some jet pumps called convertible jet pumps |
The jet assembly can be removed from the pump and placed in a well (180') max |
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Which two piston pump can be offset from the top of a well |
Shallow well piston |
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Which pump May produce enough pressure to damage a pressure system |
Reciprocating and submersible pumps (prv) |
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What are helical screw pumps usually used for |
Pumping slurries and sledges |
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When the shut-off valve is placed on a tank t for a residential installation which side of the tank T should it be placed on |
Outlet of tank t |
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What is the pressure output of a submersible pump impeller stage |
9 PSI per stage |
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Why does a submersible pump require a check valve at its Outlet |
To stop water from draining out of the drop pipe through the pump |
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What types of impellers are used on centrifugal pumps |
Closed semi closed and open |
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What device is used on the outlet of two pipe jet pumps to allow the pump to produce the most water possible |
Flow control fitting or valve |
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A good well yield is |
10 to 15gpm |
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When setting prv what pressure should it be set for |
10-15psi higher than the cut-out pressure of the pressure switch |
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To prevent undue wear and tear on the pump motor the Run Cycle of the centrifugal pump is recommended by motor manufacturers |
2 minutes Should not cycle more than 25 times per hour |
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Electrical wiring for submersible pumps should be tie wrapped to the Trop pipe at intervals of |
10 ft |
