REVIEW TEST s. Changing state from a liquid to a s C. boiling D. starving Name C
ID: 1767348 • Letter: R
Question
REVIEW TEST s. Changing state from a liquid to a s C. boiling D. starving Name Circle the letter that indicates the correct ants I. The evaporator in a refrigeration systerm condens B. flooding. A. rejects heat from the conditioned space. s heat from the conditioned space 9, If the evaporator temperature is belo must be some provision for A. defrost. B. adding refrigerant. C. feeds a partial vapor to the compressor D. feeds the liquid refrigerant to the com 2. Refrigerant entering the exaporator is approxi increasing the rate of vaporization mately A, 50% _wpC. 10% vapor, C. D. flooding the evaporator D. 75% n device is located between te B, 25% is located betw of sheet 10. The expansion A. compressor and condenser B. evaporator and compressor C. condenser and evaporator. 3. An evaporator made up of two pieces mctal that have an impression of refrigerant piping is called a A. finned-tube B. dry-type 11. Off-cycle defrost occurs C stamped D, A. with supplemental electric heat when system is shut down. B. with hot gas when the system is C. from the space temperature when the sy 4. Heat that is added to the refrigerant after it hs all vaporized is called A. superheat. shut down. D. with hot liquid refrigerant from the B. latent heat. C. artificial heat. D. extended heat. 12. A saturated vapor condition exists when A. there is still liquid refrigerant in the eva B. all of the liquid has boiled to a vapor C. there is excessive superheat. D. there is evaporator flooding. 5. A large or long evaporator would probably have A. stainless steel tubing. B. an excess of liquid refrigerant. C. an excess of vapor refrigerant. D. multiple refrigerant circuits. 13. Another name for expansion device is 6. The refrigerant leaving the compressor is often A. liquid-line receiver B. suction-line filter drier. C. high-side service valve. D. metering device. referred to as A. hot liquid refrigerant B. hot gas. C. a partial liquid. D. condensed vapor 14. A direct-expansion-type evaporator is also calli 7. A typical evaporator temperature in an air- conditioning system is A. 40°F B. 55°F A. flooded evaporator. B. dry-type evaporator C. multiple-circuit evaporator. D. stamped evaporator C. 75°E D. 200°F 2017 der page Leaning All Rights Reserved. May not be scanned, copied or duplicated or posted to a public accessible website, in whole or in part.Explanation / Answer
2. Refrigerant entering the evaporator is approximately 25% vapor.
3. An evaporator made up two pieces of sheet metal that has an impression of refrigerant piping is called a stamped evaporator.
4. Heat that is added to the refrigerant after it has all vaporized is called superheat.
5. A large or long evaporator would probably have multiple refrigerant circuits.
6. The refrigerant leaving the compressor is often referred to as hot gas.
7. A typical evaporator temperature in an air conditioning system is 40°F.
8. Changing state from a liquid to a gas is often called boiling.
9. If the evaporator temperature is below 32°F there must be some provision for defrost.
10. The expansion device is located between the condenser and evaporator.
11. Off cycle defrost occurs from the space temperature when the system is shut down.
12. A saturated vapor condition exists when all of the liquid has boiled to a vapor.
13. Another name for expansion device is metering device.
14. A direct expansion type evaporator is also called a dry-type evaporator.
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