What does the fixed maximum liquid level gauge (bleeder valve) tell the person filling a propane tank?
- The pressure inside the tank in psi
- The temperature of the liquid in the tank
- That the tank has no air or water in it
- That the liquid has reached the maximum fill level
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D. That the liquid has reached the maximum fill level
A dip tube ends at the maximum permitted liquid level. During filling the bleeder is opened; when it changes from clear vapor to a white liquid mist, the tank is full and filling stops.
Reference: NFPA 58 Sections 5.9 and 7.4 (fixed maximum liquid level gauge)
Under the DOT rules now in force, a new propane cylinder must first be requalified within how many years of its manufacture date?
- 5 years
- 7 years
- 12 years
- 20 years
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C. 12 years
A DOT specification propane cylinder must be requalified within 12 years of the manufacture date stamped on its collar. The 5-year period applies after a requalification done by external visual inspection.
Reference: 49 CFR 180.209; NFPA 58 Section 5.2
A customer brings in a cylinder whose requalification date has passed. What must the filler do?
- Fill it to half of its capacity only
- Refuse to fill it until it is requalified
- Fill it and tag it for later inspection
- Fill it if the valve has a triangular wheel
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B. Refuse to fill it until it is requalified
A cylinder that is out of date may not be filled until it has been requalified. A good valve does not make up for an expired cylinder, and partial filling is not an exception.
Reference: 49 CFR 180.205; NFPA 58 Chapter 7 (filling of cylinders)