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A-7 Heating and Air Conditioning Practice Test Answers
1.

A Answer A is wrong. Answer D is correct.

B Answer B is wrong. Answer D is correct.

C Answer C is wrong. Answer D is correct.

D Answer D is correct. A high low side and a low high side indicate a bad A/C compressor.

Return    Learn more about A/C compressor troubleshooting.
2.

A Answer A is wrong. Both technicians are correct

B Answer B is wrong. Both technicians are correct.

C Answer C is correct. A restricted heater control valve will leave a vehicle with low heater performance. The thermostat has an effect on the heaters performance.

D Answer D is wrong. Both technicians are correct.

Return    Learn more about the heating systems heater control valve.
3.

A Answer A is wrong. A fixed orifice tube provides a relatively consistent output based upon the size of its orifice. It is a compromise between idle and highway conditions.

B Answer B is correct. The fixed orifice tube is located between the condensor and the evaporator core.

C Answer C is wrong. Technician B is correct.

D Answer D is wrong. Technician B is correct.

Return    Learn more about fixed orifice tubes and variable orifice valves.
4.

A Answer A is wrong. Both technicians are correct.

B Answer B is wrong. Both technicians are correct.

C Answer C is correct. An expansion valve is placed at the inlet port of the evaporator and the sensing bulb is placed at or near the outlet port.

D Answer D is wrong. Both technicians are correct.

Return    Learn more about TXV thermostatic expansion valves.
5.

A Answer A is wrong. Evacuating a system will remove moisture. Flushing will remove debris and metal.

B Answer B is wrong. You should always evacuate a system if it's been opened to the atmosphere.

C Answer C is correct. Both technicians are correct.

D Answer D is wrong. Both technicians are correct.

Return    Learn more about automotive AC evacuation.