epa 608 practice test sample · pdf file1.in a basic refrigeration circuit, a suction line is...

EPA 608 Practice Test Sample by

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1. In a basic refrigeration circuit, a suction line is tubing a. draining away contaminated refrigerant. b. maintaining the integrity of the vacuum. c. connecting the output of the compressor to the evaporator. d. connecting the intake of the compressor to the evaporator.

2. What material is pulled in on the intake stroke of the compressor in a direct

expansion cooling system? a. superheated refrigerant vapor b. supercooled refrigerant vapor c. superheated liquid refrigerant d. supercooled liquid refrigerant

3. Which of the following abbreviations normally follows a pressure reading?

a. TPA b. EPA c. PSIG d. TPSI

4. Which of the following is not a necessary process when using a vacuum pump to

evacuate all moisture and non-condensables from a system’s tubing and component passageways?

a. ensuring that the reading does not rise when the pump is turned off b. dehydrating the system until the low-pressure gauge reads at an

appropriate level c. connecting the vacuum gauge as close to the pump as possible to ensure an

accurate reading d. having to valve off the system to check for moisture and leaks after it has

been pulled down to its proper vacuum

5. What is a CFC? a. chlorofluorocarbons b. chemical for cleaning c. carbon fluoride chemicals d. chemical fluoride casing

6. Prevention and monitoring of the release of CFCs and HCFCs was implemented

by a. the federal Clean Air Act. b. local propositions for clean air. c. a statewide Clean Air initiative. d. a presidential program against CFCs and HCFCs.


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7. Which of the following are the two main types of recovery devices the EPA requires for use?

a. low-pressure and high-pressure b. depressurized and hyper pressurized c. system-contained and self-dependent d. self-contained and system-dependent

8. What is the difference between recovery and reclaiming refrigerant?

a. Recovery is the removal of refrigerant and reclaiming is a purifying and distillation process.

b. Reclaiming is the removal of refrigerant and recovery is a purifying and distillation process.

c. Recovery is the removal of refrigerant and reclaiming is the cleaning of refrigerant by oil separation.

d. Reclaiming is the removal of refrigerant and recovery is the cleaning of refrigerant by oil separation.

9. Which of the following styles of electronic leak detectors is commonly used?

a. pulse b. laser c. ultrasonic d. photoelectric

10. A ternary blend is

a. an alternative refrigerant that occurs during the distillation process. b. a mixture of three different refrigerants with a single vapor pressure. c. a combination of three different refrigerants with varied vapor pressures. d. a bi-product refrigerant that occurs when using three valves during

evacuation.


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Correct Answers

1. D 2. A 3. C 4. C 5. A 6. A 7. D 8. A 9. C 10. C


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epa 608 practice test sample · pdf file1.in a basic refrigeration circuit, a suction line is...

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