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12 Cards in this Set
- Front
- Back
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The refrigerant that is most environmental and human compatible is ?
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R 718
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Convection currents of liquids and gases are based on?
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Buoyancy Principles
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75 lbs of water at 47 F is heated to a steam temperature of 265 F; assuming atmosphere pressure is existing when it boils, how many Btu's of total heat is required?
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87112.5 Btus
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A refrigeration system is rated for 15.5 tons, what is the total Btu load?
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3100 Btu/min
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The evaporator's principle function is to?
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Absorb heat
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The code committee that decided to number all the refrigerants is?
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ASHRAE
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The chemical component found in the refrigerants that contributed to the depletion of the ozone is?
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Chlorine
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The group of refrigerants that can be used in industrial applications is?
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Group A1, Group A2, Group B2
(All of them can be used) |
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The flame on a halide torch will turn green on a small leak with this type of refrigerant?
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R 502
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The pressure/ temperature relationship between then refrigerant and the evaporator is based on?
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The size of the piping system, type of refrigerant and the type of refrigeration system.
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Traps and separators are required to?
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Return the oil back to the Crank case
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The code that identifies refrigerants and places them into six groups is?
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CSA B52
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