Heating & A/C (A7)第 86 / 120 题
The desiccant in a receiver-drier or accumulator is used to:
a.Absorb moisture from the refrigerant
b.Add oil to the system
c.Increase refrigerant pressure
d.Cool the condenser
解析
The desiccant removes moisture that would otherwise form acids and ice, protecting the system. It should be replaced whenever the system is opened for major service. Saturated desiccant can break down and contaminate the system.
免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- The evaporator in the passenger compartment:
- Technician A says overcharging an A/C system improves cooling. Technician B says overcharging raises system pressures and can reduce cooling and damage the compressor. Who is correct?
- The expansion valve or orifice tube controls:
- 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?