Gas Piping第 102 / 120 题
A line pressure regulator is installed on a 2 psi system serving a residence. Which requirement applies to that regulator?
a.The shutoff valve must be installed downstream of the regulator only
b.The regulator vent must terminate outdoors where it cannot be blocked, and a shutoff valve must be accessible upstream of the regulator
c.The vent may terminate in any concealed space as long as it points down
d.No overpressure protection is needed because the utility regulator handles it
解析
A line regulator that requires venting must have its vent piped to the outdoors, terminated to prevent water and insect entry, and an accessible shutoff valve must be located upstream so the regulator can be isolated for service. Venting into a concealed space would discharge gas inside the building on a diaphragm failure, and downstream overpressure protection is required in addition to any utility regulator.
法律依据: IFGC §410免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- A gas range is connected with a listed appliance connector that runs 4 ft from the shutoff valve to the range. Which statement about this installation is correct?
- Which material is permitted for a buried gas service line running from an outdoor meter to a detached garage, but is prohibited for the piping inside the garage?
- A 250 gal propane tank is filled to 200 gal of usable propane. At about 91,500 Btu per gallon, roughly how many total Btu of energy are stored?
- A propane appliance with an input of 200,000 Btu/h runs continuously. Using about 91,500 Btu per gallon, about how long will 100 gal of propane last?
- A kitchen is served by a branch carrying only a 65,000 Btu/h range and a 40,000 Btu/h water heater, and that branch ends 15 ft from the meter, while the farthest outlet in the house is 90 ft from the meter. What load and what length are used to size this branch?
- Gas piping passes through a concrete foundation wall below grade. What does the code require at that point?