Đường ống gaCâu 246 / 360
What is a common standard delivery pressure of natural gas to a typical single-family residence downstream of the utility meter?
a.About 1/4 psi, roughly 7 inches water column
b.About 15 psi
c.About 60 psi
d.About 100 inches water column
Giải thích
A common residential natural gas service delivers roughly 1/4 psi, which is about 7 inches water column, at the outlet of the meter and pressure regulator. The appliance regulator then trims this to about 3.5 inches water column at the burner. Elevated-pressure (2 psi) systems exist but require a line regulator at each appliance.
Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Which statement about listed flexible appliance connectors is correct?
- A sizing table (0.5 psi drop, natural gas) shows that 3/4-inch schedule 40 pipe at a 40-foot run carries 170 cfh, and 1-inch pipe carries 320 cfh. A section must supply a 250,000 BTU/hr load over that 40-foot run. What is the smallest listed size that works?
- Where should the sediment trap be installed in relation to the appliance shutoff valve and the appliance gas control?
- Low gas pressures for appliances are commonly expressed in inches of water column. Which instrument directly reads this pressure during setup and testing?
- When performing a gas piping pressure test, why should the test gauge have an appropriate scale for the test pressure?
- What best describes CSST used in gas distribution?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB C-36 Plumbing Trade Examination · Quy trình kiểm tra