Human error is the #1 cause of combustion related incidents.

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Question #1: How often do gas lubricated plug valves need to have sealant injected to function?

Question #2: Requirements for an annual preventive maintenance program for the safety interlocks and automatic gas valves for boilers is described in….?

Question #3: Testing the high gas pressure switch on equipment over 2,500,000 BTU/hr is required…?

Question #4: You look into a sight port to observe the flame. You happen to notice that the flame is a very pale blue color and it sounds somewhat noisy. What type of air/fuel ratio is this indicative of?

Question #5: What action does a high temperature limit trip indicate?

Question #6: Boilers less than 12,500,000 BTU/hr input are covered under NFPA 85 (National Fire Protection Association)?

Question #7: Purge timers must be set to ensure sufficient air movement through a combustion piece of equipment equal to how many air changes?

Question #8: When a gas flame is adjusted properly it will look yellow and orange and not have much movement to it. This means the flame is very stable and efficient.

Question #9: When purging the gas line it is OK to…?

Question #10: When pressure testing a natural gas line, you are allowed…?

Question #11: Burner efficiency increases as the excess air…?

Question #12: A quick-closing and slow-opening valve used on a burner gas train is called…?

Question #13: A cross-connected system uses linkages run in parallel with the gas and the air to control firing rate.

Question #14: Requirements for the repair and installation of natural gas piping are found in which of the following documents?

Question #15: The auto-ignition temperature of natural gas in air is about?