Mazda TC070-15-01H, Руководство для студентов

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AIR CONDITIONING
SG00b - Pre-Test
SG00b-4
TC070-15-01H
12. Technician A says do not expose refrigerant to open flame. R-12 may produce
poisonous phosgene gas, and R-134a may support combustion.
Technician B says a propane torch style leak detector is the best type of detector for
R-12 and R134a systems.
Who is correct?
a. Technician A
b. Technician B
c. Both Technicians
d. Neither technician
13. Technician A says if refrigeration oil is not sealed properly, it will absorb moisture
from the air.
Technician B says you can reuse refrigeration oil removed from an operating A/C
system.
Who is correct?
a. Technician A
b. Technician B
c. Both Technicians
a. Neither technician
14. Technician A says after repairs have been performed, or if a system has been
open for a long period of time, the system must be evacuated to remove moisture
and ensure that it will hold a vacuum.
Technician B says the minimum time any system should be evacuated is 15 minutes.
The longer the system has been open, the longer it should be evacuated.
Who is correct?
a. Technician A
b. Technician B
c. Both Technicians
d. Neither technician
15. Technician A says all refrigerant should be recovered and recycled.
Technician B says only R-12 needs to be recovered and recycled.
Who is correct?
a. Technician A
b. Technician B
c. Both Technicians
d. Neither technician