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NATE A C Exam -1 Questions and Complete Solutions Graded A+

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Low airflow over a residential split system air conditioning evaporator can cause A: Liquid flood-back to the compressor B: A decrease in compression ratio C: An increase in suction line superheat D: Oil logging in the evaporator - Answer: A: Liquid flood-back to the compressor ...

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  • August 14, 2024
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NATE A C Exam #1
Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]

,Low airflow over a residential split system air conditioning evaporator can cause



A: Liquid flood-back to the compressor



B: A decrease in compression ratio



C: An increase in suction line superheat



D: Oil logging in the evaporator - Answer: A: Liquid flood-back to the compressor



Which of the following is the correct sequence of work?



A: Attach gauge manifold, recover refrigerant, replace filter core, evacuate the system, recharge the
system.



B: Recover refrigerant, evacuate the system, replace filter core, recharge the system.



C: Attach gauge manifold, evacuate the system, replace filter core, recover refrigerant, recharge the
system.



D: Attach gauge manifold, recharge the system, evacuate the system, replace filter core. - Answer: A:
Attach gauge manifold, recover refrigerant, replace filter core, evacuate the system, recharge the
system.



As the pressure on a liquid is increased, the vaporization temperature of the liquid



A: Decreases



B: Increases

, C: Remains unchanged



D: Varies - Answer: B: Increases



An oil separator must be mounted



A: Level



B: Below the compressor crankcase



C: Above the compressor crankcase



D: In the suction line - Answer: A: Level



Which of the following metering devices controls evaporator pressure?



A: Thermostatic expansion valve



B: Fixed orifice



C: Low side float



D: None of these - Answer: D: None of these



An automatic expansion valve controls evaporator pressure.



The purpose of the external equalizer on a thermostatic expansion valve is



A: To equalize evaporator pressure drop with respect to the TEV

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