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Study MCQ
Refrigeration and Air Conditioning Technician
MULTI SPLIT AC AND CAR AIR CONDITIONING
Set 8
Set 8
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Q10154
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Which level of vacuum is required before charging HFC 134a in car AC?
A
500 micron
B
400 micron
C
300 micron
D
200 micron
Q10155
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What is the diameter of liquid line used with 5 TR if the suction line is 7/8 OD by up flow?
A
1/2? OD
B
5/16 ? OD
C
3/8 ? OD
D
3/4 ?OD
Q10156
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Which bearing is used in blower motor of indoor unit in ductable split air conditioner?
A
Ball bearing
B
Thrust bearing
C
Sleeve bearing
D
Open ball bearing
Q10157
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What is the velocity range of air circulated in car AC?
A
2 - 3 m / sec
B
5 - 7 m / sec
C
7 - 9 m / sec
D
9 - 10 m / sec
Q10158
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What is the test pressure of cooling coils during manufacture?
A
150 psig
B
250 psig
C
350 psig
D
450 psig
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