Automotive HVAC Final study set questions & Answers!

Which unit contains a desiccant to remove moisture from the system? - ANSWER Receiver dryer and Accumulator In a piston type compressor, the pistons are driven by what? - ANSWER Swash plate, Crankshaft or Wobble plate (All of the Above) The basic design of compressors include what? - ANSWER Piston, Vane and Scroll The Wobble plate is moved to the high angle position for max output when the cooling load is high (True or False) - ANSWER True The wobble plate angle is controlled by the pressure in the crankcase of the compressor (True or False) - ANSWER True A compressor speed (belt lock) sensor is used by the HVAC ECM to? - ANSWER Prevent a locked up compressor from breaking the drive belt, Compares compressor speed with engine speed (Both A and B) R-134A is in what color container? - ANSWER Light blue What section of the clean air act concerns work on air conditioning systems in vehicles? - ANSWER 609 Section 609 requires A/C technicians to be properly trained and certified (True or False) - ANSWER True Section 609 requires that recovery and recycling equipment be of an approved type (True or False) - ANSWER True Mixing small amounts of refrigerant is acceptable according o the EPA (True or False) - ANSWER False Each refrigerant must have unique fittings to reduce accidental mixing of refrigerants (True or False) - ANSWER True A cooling module usually includes what components? - ANSWER A/C condenser, Radiator, and Automatic Transmission fluid cooler (All of the above) In the condenser, the refrigerant changes into a? - ANSWER Liquid The orifice tube is usually located at the inlet tube to the? - ANSWER Evaporator A TXV system uses a receiver-dryer mounted in the suction line (True or False) - ANSWER False