HVAC Technician Core (NATE-style) — Practice Exam
Comfort: humidity: practice questions
Our HVAC Core (NATE-style) bank has 7 questions on this topic. Here are 3 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
What relative humidity range is commonly recommended for indoor comfort?
- About 5–10%
- About 80–90%
- About 30–60%
- About 100%
Show the answer
C. About 30–60% — Many sources cite 30–50% or 40–60%.
Question 2
If air is cooled without adding or removing moisture, what happens to its relative humidity?
- It stays the same
- It falls
- It rises
- It drops to zero
Show the answer
C. It rises — Cooler air holds less moisture.
Question 3
What is the dew point?
- The temperature of the supply air leaving the evaporator coil
- The humidity at noon
- The temperature at which air becomes saturated and moisture starts to condense
- The boiling point of water
Show the answer
C. The temperature at which air becomes saturated and moisture starts to condense — Surfaces below the dew point sweat.