Type III — Low-PressureQuestion 162 of 240
When pressurizing a low-pressure appliance to search for leaks, what is the maximum pressure a technician may apply?
a.5 psig
b.10 psig
c.15 psig
d.20 psig
Explanation
A low-pressure appliance must never be pressurized above 10 psig. The shell is protected by a rupture disk that typically relieves at 15 psig, so staying under 10 psig keeps a safe margin below that disk. Higher pressures risk bursting the rupture disk and venting the charge.
Law Reference: 40 CFR §82.156Practice all 240 questions free — no signup required.
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