Heating & A/C (A7)Câu 90 / 120
Before servicing an A/C system, refrigerant must be:
a.Recovered with approved equipment, not vented to the atmosphere
b.Vented outdoors quickly
c.Mixed with fresh oil
d.Frozen in the condenser
Giải thích
Regulations require recovering refrigerant with certified equipment rather than releasing it, because it is a controlled substance. Recovery, recycling, and recharging equipment protects the environment and allows accurate recharging. Technicians handling refrigerant must be certified.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- The desiccant in a receiver-drier or accumulator is used to:
- Technician A says a low refrigerant charge typically shows low readings on both gauges with poor cooling. Technician B says the leak should be repaired before recharging to the correct weight. Who is correct?
- Technician A says cabin heat comes from engine coolant flowing through the heater core. Technician B says a leaking heater core can fog the windshield and leave a sweet smell. Who is correct?
- Technician A says a stuck-closed blend-air door can cause no heat even with a good heater core. Technician B says a failed blower motor can cause no airflow from the vents. Who is correct?
- An A/C compressor clutch that will not engage could be caused by all of the following EXCEPT:
- Higher-than-normal readings on both the high and low sides of an A/C system, with poor cooling, could indicate:
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