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25 Cards in this Set
- Front
- Back
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Which refrigerant can be used for leak detection as a trace gas and pressurized with nitrogen A. R-12 B. R-11 C. R-22 D. R-115 |
C. R-22 |
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Traces of oil around the sight glass inlet fitting of a refrigeration system might be the indication of A. A leak B. Excessive oil in the system C. An overcharge D. A restriction at the TXV |
A. A leak |
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A condition of excessive superheat at the evaporator outlet and compressor inlet of an air conditioning system could be an indication of A. High head pressures B. A dirty condenser C. Insufficient water D. Low on refrigerant charge |
D. Low on refrigerant charge |
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Type 2 classification, as identified by EPA, applies to what equipment A. Small appliances with 5 pounds of refrigerant and less B. Refrigerator, freezer, and vending machine appliances C. Low-pressure appliances D. Split air-conditioning equipment with 5 pounds of refrigerant and greater |
D. Split air conditioning equipment with five pounds of refrigerant and greater |
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Front seating the three-way suction service valve will close the A. Suction inlet to the valve B. Gauge port C. Guage port and suction inlet D. Valve port to compressor |
A. Section inlet to the valve |
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The required level of evacuation for recovery equipment manufactured before November 15, 1993, on a system with an R-22 charge of less than 200 pounds is A. 0" hg B. 4" hg C. 10" hg D. 25" hg |
A. 0" hg |
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The required level of evacuation for recovery equipment manufactured after November 15, 1993, on a system containing less than 200 pounds of R-22 refrigerant is A. 0" hg B. 4" hg C. 10" hg D. 15" hg |
A. 0" hg |
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The required level of evacuation for recovery equipment manufactured after November 15, 1993, on a system containing less than 200 pounds of R-12 refrigerant is A. 0" hg B. 4" hg C. 10" hg D. 15" hg |
C. 10" hg |
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Industrial process in commercial refrigeration equipment with an annual leak rate of _____% requires repair under EPA regulations A. 0 B. 15 C. 35 D. 50 |
C. 35 |
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Comfort cooling chillers and all other equipment with an annual leak rate of _____% requires repair under EPA regulations A. 0 B. 15 C. 35 D. 50 |
B. 15 |
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Recovery time can be shortened by A. Recovering as much liquid as possible in the initial B. Using short hoses C. Cooling the recovery tank in ice water D. All of the above |
D. All of the above |
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Good majority of the liquid to be recovered from a system will be found in the A. Condenser B. Receiver (when applied) C. Low side of system D. Evaporator |
B. Receiver (when applied) |
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It becomes the owner's responsibility to maintain records of all refrigerant added to units that contain more than _______ pounds of refrigerant charge A. 15 pounds B. 20 pounds C. 35 pounds D. 50 pounds |
D. 50 pounds |
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A major repair is defined by EPA, as replacing the A. Condenser fan B. Compressor C. Evaporator D. B and C above |
D. B and C above |
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Exceptions to the required evacuation levels for recovery equipment that require an appliance to be evacuated to only 0 psig apply to appliances that A. Are being salvaged B. Are filled with water or substances that would damage the recovery equipment C. Have defective evaporator fan motors D. Have air-cooled condensers |
B. Are filled with water or substances that would damage the recovery equipment |
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The generally accepted rule for maximum liquid filling of cylinders is A. 50% B. 65% C. 80% D. 95% |
C. 80% |
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The refrigerant you would expect to find an a split air conditioning system manufactured before 1995 would be A. R-12 B. R-11 C. R-22 D. R-502 |
C. R-22 |
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Split-dependent recovery equipment is limited to appliances containing less than ______ pounds of refrigerant A. 15 B. 35 C. 50 D. 65 |
A. 15 |
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The condition and state of refrigerant entering the receiver is A. Superheated high-pressure vapor B. Superheated low-pressure vapor C. Subcooled high pressure liquid D. Subcooled low pressure liquid |
C. Subcooled low pressure liquid |
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Deep vacuums used for evacuation and dehydration of systems are measured in A. Tons B. Psig C. Psia D. Microns |
D. Microns |
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Non-condensibles in an air conditioning or refrigeration system will A. Tend to stay in the top of the condenser B. Increase the high side pressure C. Be purged with a recovery machine D. All of the above |
D. All of the above |
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The condition and state of refrigerant leaving the accumulator of a system is A. Superheated high-pressure vapor B. Superheated low-pressure vapor C. Supercooled high pressure liquid D. Supercooled low pressure liquid |
B. Superheated low pressure vapor |
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R-134a is a drop in replacement refrigerant for A. R-12 B. R-22 C. R-11 D. It is not a drop in replacement |
D. It is not a drop in replacement |
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One of the easiest ways to identify the type of refrigerant in a system is to A. Check the stem of the TXV B. Check the name plate data C. Check the safety pressure cutouts D. Smell the refrigerant |
B. Check the name plate data |
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At room ambient temperature of 80ﾟF, the pressure of a cylinder containing R-22 will be approximately A. 143 psig B. 74 psig C. 114 psig D. 212 psig |
A. 143 psig |
