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B gas fitters course Exam 2024/2025 Questions With Completed & Verified Solutions.
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B gas fitters course Exam 2024/2025 Questions With Completed & Verified Solutions.
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B gas fitters coursePilot turn down test - ANS -To Reduce the pilot to a point that will just hold in any safeties
-Then attempt to light main burner, must light within 4 seconds for residential
Base volume index (BVI) - ANS Acts like BPI except it will correct to selling temperature and
pressure
Base pressure index (BPI) - ANS Records Uncorrected volume of gas consumption
Re calculates and corrects the volume to selling pressure
Incinerating pilot - ANS Similar to aerated pilot
Primary air passes by the flame to incinerate lint or dust to protect orfice from being plugged
Aerated pilot - ANS Sharp intense blue flame as a result of pre mixing air/gas (primary mixing)
Shorter thermocouple lifespan
Non aerated pilot - ANS Lazy soft blue flame
Result of no pre mixing of air/gas
Secondary air only
Expanding pilot - ANS Pilot that burns at a low turn down throughout the entire time burner is in
service
Upon a call for heat, the pilot fuel flow is automatically increased to produce a flame to ignite the
main burner
Interrupted pilot - ANS A pilot which is automatically lighted on a call for heat. Then cut off once
main burner is established
Intermittent pilot - ANS A pilot which is automatically lighted each time there is a call for heat
and burns the entire period that the main burner is firing
Standing Pilot - ANS A pilot flame that remains burning continuously
Whether the burner is on or off
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