HVAC & Refrigeration Tech Tips
1. The R-410A manifold set has a high-pressure gauge graduated to:
A) 200 psig.
B) 400 psig.
C) 600 psig.
D) 800 psig.
2. R-410A recovery equipment:
A) Can be used with R-22 and R-410A.
B) Must be dedicated to R-410A systems.
C) Must be used with a DOT 4BW250 cylinder.
D) Must be used with a DOT 4BA250 cylinder.
3. The low-pressure switch utilized on R-410A systems:
A) Opens at 50 psig and closes at 95 psig.
B) Opens at 15 psig and closes at 40 psig.
C) Opens at 25 psig and closes at 50 psig.
D) Opens at 30 psig and closes at 75 psig.
4. The low-pressure switch utilized on R-22 systems:
Answers: 1: d, 2: b, 3: a, 4: b.
6
