Air conditioning Certification practice test.pdf file:///C:/Users/HP/Desktop/New%20fl/Air%20conditioning%20Certif
Air Conditioning Certification Practice Test
1. What is the movement of heat through space called?
Answer Radiation
2. A refrigerant release heat when
Answer It condenses
3. Why is it desirable for refrigerant in the suction line to be slightly superheat- ed?
Answer To insure liquid refrigerant does not enter the compressor
4. A 30 pound cylinder of reclaimed R-22 refrigerant has been stored over night at 70
degrees F. What should be the approximate pressure in the cylinder?
Answer 121 psig
5. 14.7 psia( pouds per square inch absolute) is
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,Air conditioning Certification practice test.pdf file:///C:/Users/HP/Desktop/New%20fl/Air%20conditioning%20Certif
Answer Approximately 0 PSIG
6. What is the main fuction of an air condition condenser?
Answer To remove heat from the refrigerant
7. Refrigerant R-134a vapor enters the condenser at 124 psig, 100 degrees F. It leaves the
condenser at 80 degreesF.What will be the approximate pressure?-
Answer 124 psig (the pressure should not change entering or leaving the condenser)
8. Which of the following CANNOT be used as a low ambient temperature control?
Answer Crankcase regulating valve
9. When testing the efficiency of a (10 seer are lower) air cooled condenser, the refrigerant
condensing temperature should be no more than higher
than the entering air temperature
Answer Approximately 30 degrees F
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,Air conditioning Certification practice test.pdf file:///C:/Users/HP/Desktop/New%20fl/Air%20conditioning%20Certif
10. When testing the efficiency of a water cooled condenser, the refrigerant condensing
temperature should be no more higher than the leaving
water temperature.
Answer 10 degrees F
11. What does a temperature differential across a filter-drier indicate?
Answer Re- stricted filter-drier
12. Which of the following symptoms would be indicative of an oil logged
evaporator?
Answer Reduce heat transfer through the walls of the coil
13. When using an electronic leak detecto, the sensor probe
Answer should be moved at approximately 1 inch per second
14. Before a vapor / compression system is opened for service
Answer the refrigerant must be recovered using approved equipment
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