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Mechanic Refrigeration & Air Conditioning Practice Test: Mobile Air Conditioning
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Mechanic Refrigeration & Air Conditioning Practice Test: Mobile Air Conditioning
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25 Questions

1. What are the controls connected in series with the magnetic clutch of compressor in car AC?
2. Which type of short cycling is avoided by the design of blower housing in car AC?
3. What is the human body temperature in °C?
4. Which process of vapour compression system is represented along C→D in pH chart?
5. What is being tested between the compressor drive pulley and the function plate in a car air- conditioner?
6. Which controls the speed of blower fan motor to vary air cooling or heating in car AC?
7. What is the reason for water dripping inside the AC bus?
8. What is the name of device used for gas charging in car AC system?
9. What is tested by 12V DC battery on compressor used in automobile air conditioner?
10. Where the sensor bulb of Thermostatic Expansion Valve is clamped?
11. What is the reason for having 2.5 kg/cm2 on low and high side of car AC system?
12. What is tested by the multimeter on thermostatic switch?
13. What is the name of part marked as x in receiver-drier used in automobile air-conditioner?
14. Why the service port fitting size differs in HFC-134a from CFC-12 car AC system?
15. What is the cause of bubbles in liquid line at sight glass in car AC system?
16. Why both the gauges read abnormal high pressures while testing the car AC performance?
17. What is the equivalent of 760mm of Hg in torr?
18. What is the advantage of recycling R 134a refrigerant?
19. Which lubricant oil is used with R-134a car AC system?
20. What is the effect of sludge in car AC?
21. What is the absolute pressure of gas cylinder if the gauge reads 15.3 p.s.i.g?
22. What is the function of magnetic clutch in an automobile air conditioner?
23. What is the name of component?
24. Which operating condition opens the HPC control switch in car AC?
25. What is the temperature of air at the supply grille in car AC system at an ambient 35°C?

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