Type II — High-PressureCâu 143 / 240
A DOT-approved refrigerant recovery cylinder must be periodically retested for safety. What is the standard hydrostatic retest interval for these cylinders?
a.Every 12 months
b.Every 2 years
c.Every 5 years
d.They never require retesting
Giải thích
DOT refrigerant recovery cylinders must be hydrostatically retested every 5 years to confirm they can safely hold pressure. A cylinder past its test date should not be filled until it is retested. This helps prevent ruptures from corrosion or fatigue over time.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A very-high-pressure appliance using R-13 must have its refrigerant recovered before service. Using recovery equipment made after November 15, 1993, what is the required evacuation level?
- A technician measures 12°F of superheat on a fixed-orifice R-22 system but the manufacturer's chart calls for 20°F at those conditions. What does the low superheat suggest?
- During recovery from a Type II system, a technician sees noncondensable gases (air) collected in the recovery cylinder. What is the correct handling under Section 608?
- A technician wants a quick way to know whether a recovery cylinder is a refrigerant recovery cylinder by its color scheme. What is the standard color for a refrigerant recovery cylinder?
- A technician performing recovery notices the process is very slow because the recovery cylinder is warm and its pressure is high. Which action will speed recovery?
- A technician needs to evacuate a Type II system to remove moisture and reaches 500 microns on the micron gauge. After isolating the pump, the reading climbs and stabilizes around 5,000 microns. What does this most likely indicate?
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