NATE AC UPDATED RECENT 2026 EXAM TEST QUESTIONS AND ANSWERS SURE

NATE AC UPDATED RECENT 2026 EXAM TEST
QUESTIONS AND ANSWERS SURE A+
✔✔All else being normal, if a system shows a high lowside superheat with low
condenser subcooling, what is most likely the problem?

A: Refrigerant overcharge

B: Refrigerant undercharge

C: A partial restriction

D: There is probably no problem - ✔✔B: Refrigerant undercharge

✔✔A grille equipped with a damper control is called

A: A vane

B: A register

C: A louver

D: A damper - ✔✔B: A register

, ✔✔A pressure relief valve is

A: Direct pressure acting

B: Remote pressure activated

C: Manually operated

D: Reverse pressure acting - ✔✔A: Direct pressure acting

✔✔A parallel compressor system in which both the crankcase oil level and the
refrigerant gas pressure are equalized is a

A: Double pipe crankcase equalizer system

B: Single pipe crankcase equalizer system

C: External equalizer oil system

D: Crankcase hot gas oil equalizer - ✔✔A: Double pipe crankcase equalizer system

✔✔In a direct expansion chiller used on air conditioning applications, the refrigerant is
on what side of the tubes?

A: Around the diverter

B: In the tubes

C: Surrounding the tubes

D: On both sides - ✔✔B: In the tubes

✔✔The total minimum open area for air to flow through on a supply air register is called

A: Free area

B: Open area

C: Core area

D: Drop area - ✔✔A: Free area

✔✔Which type of copper tubing has the thickest wall?