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FREE AND STUDY GAMES ABOUT TYPE II OCT 2018 EXAM
QUESTIONS
Qs and Ans Expert- Explanation
This Exam contains:
-Guarantee passing score -25 Questions and Answers -format set of multiple-choice -Expert- Explanation Question 1: 8. Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following,
Answer:
- oil
Question 2: 19. When is it against EPA regulations to use system-dependent recovery equipment,
Answer:
- When the appliance contains over 15 pounds of refrigerant.
Question 3: 25. It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method, However,
Answer:
- requires a pressure regulator
Question 4: 15. What should be done after reaching the required recovery vacuum on an appliance,
Answer:
- Wait for at least a few mins to see if the system pressure rises.
Question 5: 5. An initial leak verification test failed after repairing a leak in a rack refrigeration system for a supermarket using an HCFC refrigerant . What would be the next step,
Answer:
- Conduct additional repairs within 30 day repair window or mothball the appliance.
Question 6: 12. Your recovery/recycling machine has R-22 refrigerant in it. you now have to recover refrigerant from an R-410A unit. What must be done before recovery,
Answer:
- remove the R-22 from recovery unit and change the filter.
Question 7: 16. Before making a major repair, technicians must evacuate an appliance or component containing more then 200 pounds of R-410A to which of the following levels,
Answer:
- 10 inches of Hg vacuum
Question 8: 7. Where must you connect the hose in order to recover liquid refrigerant,
Answer:
- Liquid line
Question 9: 17. When can appliances containing refrigerants be recovered to atmospheric pressure,
Answer:
- Leaks in the appliance make recovery to the prescribed level unattainable.
Question 10: 11. Why could a recycling or recovery machine that uses a hermetic compressor overheat when drawing deep vaccum,
Answer:
- The motor relies on the flow of refrigerant through the compressor for cooling.
Question 11: 9. After refrigerant liquid has been recovered from the appliance, any remaining vapor,
Answer:
- removed by the recovery system.
Question 12: 2. Which part of a belt driven non-hermetic compressor is most likely to leak if the compressor is not been used for several months,
Answer:
- Rotating shaft seal.
Question 13: 23. For what refrigerant is an equipment room refrigerant detector not require ASHRAE Standard 15 provided the mechanical ventilation system in the machinery is run continuously
Answer:
D. R717
Question 14: 6. When recovery is first started, at what phase is the refrigerant removed to save recovery time,
Answer:
- Liquid phase
Question 15: 18. Which of the following repairs would always be consider"major" under EPA regulations,
Answer:
- Replacement of an evaporator coil.
Question 16: 13. Which of the following statements about recycling and recovery equipment is false?
Answer:
- Purchases of such equipment must be reported to the EPA.
Question 17: 4. After a leak repair of a supermarket rack using 3000lbs of R-22 and a sucessful initial verification test, when must a follow up leak verification test be conducted,
Answer:
- Within 10 days
Question 18: 1. When first inspecting hermetic system known to be leaking, you should look for,
Answer:
- Traces of oil
Question 19: 10. How can speed up the removal of the refrigerant charge from a system,
Answer:
- Cooling the recovery cylinder to lower its pressure.
Question 20: 20. What is the state of the refrigerant leaving the receiver in a refrigeration system,
Answer:
- High pressure liquid.
Question 21: 22. How would you remove moisture from refrigerant in a system.
Answer:
- Use a filter drier.
Question 22: 14. You are changing out of the compressor of a system containing 40 pounds of R-404A. In addition isolating the compressor , which of the following procedures should you follow,
Answer:
- Evacuate the isolated section of the system to 0 psig, and if system pressure does not rise after a
few mins, remove the compressor
Question 23: 24. When could a reciprocating compressor be damaged if energized,
Answer:
- When the discharge service valve is closed.
Question 24: 21. Identify the best method to charge a system that has both an air-cooled condenser and evaporator with a name plate charge of 80 pounds.
Answer:
- Liquid charge through the liquid-line service valve.
Question 25: 3. Starting in 2019, what rate triggers the EPA requirement that the refrigement containing 50 pounds or more of R-22 be repaired,
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