Type III — Low-PressureQuestion 182 of 240
HCFC-123 requires good ventilation during service primarily because it:
a.Is highly flammable
b.Has a low exposure limit and can accumulate in low areas
c.Reacts violently with water
d.Freezes at room temperature
Explanation
HCFC-123 has a relatively low allowable exposure limit, and like most refrigerants it is heavier than air and can accumulate near the floor in a machine room, displacing oxygen. Good ventilation and a refrigerant monitor protect the technician. It is not flammable, but exposure must still be controlled.
Practice all 240 questions free — no signup required.
Related questions on this topic
- When recovering from a low-pressure chiller with a large charge, the most efficient practice is to:
- The rupture disk on a low-pressure appliance should be:
- A device that automatically maintains the correct refrigerant level between the condenser and evaporator of a low-pressure chiller is the:
- Before opening a low-pressure chiller to replace a failed tube bundle, the technician must:
- R-1233zd is increasingly used in modern low-pressure chillers because it:
- Which statement about pressurizing a low-pressure appliance for leak detection is correct?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against EPA Section 608 Technician Certification Exam · How we review