ASE A7 Heating Air Conditioning Practice Test
46. During a performance test on a CCOT A/C system, the manifold gauge set indicates that the low side pressure is high and the high side pressure is low. These test results indicate:
- A. A frozen expansion valve.
- B. A bad compressor.
- C. A restricted condenser.
- D. A clogged receiver drier.
47. A vehicle's passenger heating system is set to MAX HEAT but blows warm air only. All of the following will cause this condition EXCEPT:
- A. An air pocket in the heater core.
- B. A restricted heater control valve.
- C. A weak engine cooling fan motor.
- D. A clogged heater core.
48. The fixed orifice tube is removed from the high side of a CCOT air conditioning system. Metal debris is clogging the inlet screen. This metal debris is MOST likely caused by:
- A. A ruptured desiccant bag.
- B. The evaporator core.
- C. A worn compressor.
- D. The condenser.
49. Technician A says an expansion valve reduces refrigerant pressure as it enters the evaporator core. Technician B says the expansion valve is fastened to the inlet port of the evaporator core. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
50. Technician A says evacuating an air conditioning system will remove air, debris, and moisture. Technician B says to evacuate the system whenever it's been exposed to the atmosphere. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B