NATE AC PRACTICE 2026 TEST ALL QUESTIONS AND ANSWERS SURE

NATE AC PRACTICE 2026 TEST ALL QUESTIONS AND
ANSWERS SURE A+
✔✔A compressor is short cycling. Which of the following would not be the cause?

A: Low pressure controller differential set too close

B: Automatic reset high pressure control differential set too close

C: Low refrigerant charge

D: Leaking compressor suction valve - ✔✔D: Leaking compressor suction valve

✔✔The position of the valve stem on the suction service valve is normally

A: Fully-back-seated

B: Full-front-seated

C: Mid-seated

D: Half cocked - ✔✔A: Fully-back-seated

, ✔✔Of the three fundamental fan laws, one states that the power varies by the ______
of the speed.

A: square

B: cube

C: rate

D: inverse - ✔✔B: cube

BHP2 = BHP1 x ((CFM2/CFM1)cubed)

✔✔Abnormally low suction pressure can be caused by which of the following?

A: Dirty air filter

B: Partially restricted filter-drier

C: Shortage of refrigerant

D: Any or all of these - ✔✔D: Any or all of these

✔✔Which of the following compressor oil types is generally considered the most
compatible with HFC refrigerants?

A: POE

B: AB

C: Mineral

D: Vegetable - ✔✔A: POE

✔✔The factor determining the correct quantity of air for each room in a building is

A: The calculated heat load for each room

B: The size of the room

C: The size of the ducts

D: The customer's preference - ✔✔A: The calculated heat load for each room

✔✔Refrigerant 22 is classified as an