Gas PipingQuestion 231 of 360
A propane (LP) appliance has an input of 75,000 BTU/hr. Using an approximate heating value of 2,500 BTU per cubic foot for propane, what is its demand in cfh?
a.75 cfh
b.30 cfh
c.300 cfh
d.3 cfh
Explanation
For propane, divide the input by about 2,500 BTU per cubic foot: 75,000 divided by 2,500 equals 30 cubic feet per hour. Propane carries far more energy per cubic foot than natural gas, so its cfh demand is much smaller for the same BTU load. Always match the sizing table to the correct fuel.
Law Reference: California Plumbing Code, Fuel Gas provisionsPractice all 360 questions free — no signup required.
Related questions on this topic
- What is the primary purpose of a sediment trap (drip leg) installed ahead of a gas appliance control?
- A helper wants to route a flexible appliance connector through the back wall of a cabinet to reach the gas cooktop. What is the correct rule?
- For a rough-in pressure test of a new low-pressure gas piping system, which test condition is commonly required by the plumbing code?
- Corrugated stainless steel tubing (CSST) gas systems have an important electrical requirement. What is it?
- Under what condition is copper tubing generally permitted for a natural gas distribution system?
- When using the longest-length (longest-run) method to size a gas piping system, which length is used to select pipe size for every section?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB C-36 Plumbing Trade Examination · How we review