NATE A/C Exam #1 2025 Questions and Answers

NATE A/C Exam #1 2025 Questions and
Answers


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.




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,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



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, 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




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