G2 Gas Technician Module 12 Exam
Questions and answers with 100%
Complete Solutions | verified &updated
2024
Closed circuit test(thermostat CLOSED) on a thermopile system. - ✔✔400-
450 milivolts
What does a flame rod do? - ✔✔Senses a pulsating dc current that signals flame
is present.
How should you size a flame rod? Why? - ✔✔Must have 4 times less surface
area then the ground. Normal practice is 10 times smaller. This causes the signal
to flow easier from the flame rod to ground.
- ✔✔Flame failure response 0.8 seconds
,- ✔✔Total for ignition lockout between 15 & 90s
- ✔✔Spark gap 1/8 to 3/16"
Pilot flame rectification- - ✔✔Pre purge up to 45 seconds
- ✔✔What is flame failure response time?
- ✔✔Trial for ignition safety lockout range?
- ✔✔Distance for spark gap?
- ✔✔Potential pre purge time?
, - ✔✔Trial for ignition 4 seconds
Direct spark ignition- - ✔✔Flame failure response 0.8 seconds
- ✔✔Trial for ignition time?
- ✔✔Flame failure response time?
direct spark ignition and hot surface ignition,Types of ignition control modules? -
✔✔intermittent pilot
- ✔✔1. Safe start check
- ✔✔2. Ignite flame
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