Gas PipingQuestion 91 of 120
On which of the following appliances does the IFGC NOT require a sediment trap ahead of the appliance control valve?
a.A 100,000 Btu/h forced-air furnace
b.A 40 gal storage water heater
c.A gas-fired boiler
d.A clothes dryer
Explanation
The IFGC exempts illuminating appliances, ranges, clothes dryers, decorative appliances, gas fireplaces and outdoor grills from the sediment trap requirement; a clothes dryer is on that list. Furnaces, water heaters and boilers all have gas control valves that must be protected, so each requires a trap located as close to the appliance inlet as practical.
Law Reference: IFGC §408.4Practice all 120 questions free — no signup required.
Related questions on this topic
- Measured along the pipe, the most remote gas outlet in a building is 78 ft from the meter. Sizing tables are printed in 10 ft length increments. Which length row should be used?
- A residential natural gas system is supplied at about 7 in w.c. from the utility meter. Which allowable pressure drop is normally used with the standard low-pressure sizing tables for this system?
- A gas furnace sits in a basement mechanical room. Its manual shutoff valve is installed in an adjacent storage room 9 ft away, behind a closed door. Why does this installation fail inspection?
- A corrugated stainless steel tubing (CSST) gas system is installed in a two-story house. What is the minimum size of the copper bonding jumper used to bond the CSST system to the electrical service grounding electrode system?
- A new residential gas piping system will operate at a working pressure of 7 in w.c. (about 1/4 psi). What is the minimum test pressure required for the pressure test?
- The same 3 psi test is applied to the piping with a mechanical gauge. What is the minimum time the pressure must be held without any loss?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against Journeyman Plumber Licensing Exam (UPC/IPC-based) · How we review