MULTI SPLIT AC AND CAR AIR CONDITIONING - Practice Mode

1) Which level of vacuum is required before charging HFC 134a in car AC?

500 micron 400 micron 300 micron 200 micron

Correct Answer: 200 micron

2) What is the diameter of liquid line used with 5 TR if the suction line is 7/8 OD by up flow?

1/2? OD 5/16 ? OD 3/8 ? OD 3/4 ?OD

Correct Answer: 1/2? OD

3) Which bearing is used in blower motor of indoor unit in ductable split air conditioner?

Ball bearing Thrust bearing Sleeve bearing Open ball bearing

Correct Answer: Sleeve bearing

4) What is the velocity range of air circulated in car AC?

2 - 3 m / sec 5 - 7 m / sec 7 - 9 m / sec 9 - 10 m / sec

Correct Answer: 2 - 3 m / sec

5) What is the test pressure of cooling coils during manufacture?

150 psig 250 psig 350 psig 450 psig

Correct Answer: 350 psig

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