Ontario Gas G1 Practice Exam Prep B149.3-10 Questions and Answers Fully Solved 100%

A combustion air-proving switch is an example of? - A running interlock A cracked flame rod insulator will cause? - A high resistance AC short to ground A flame rod? - Transmits a DC signal A high gas pressure switch should be set to open at? - 25% above operating pressure A lead sulphide cell is used to detect? - Infrared radiation A low gas pressure switch should be set to open at? - 50% below operating pressure A pre-purge is required on all burners employing? - Electronic ignition A programming flame safeguard control is a control that? - Incorporates timing mechanist sequence burner start-up A proven low-fire start is required on burners in excess of? - 1000000 A valve not considered 100% shutoff - Butterfly valve An UV scanner should be sighted to view? - The base of the flame How many times should you press the reset button on the flame safeguard control of an industrial gas burner? - OnceIf an industrial gas burner employs a flame rectification system, the area of the ground plate must be? - 4x the area of the flame rod If the combustion air switch opens during the start-up of an industrial gas burner you should? - Check the air supply delivery system The "Bleed" valve on a double block&bleed system is required on an appliance firing over? - The maximum flame failure response time allowed on a gas appliance firing seconds The minimum required pre-purge on an industrial gas-fired appliance? - 4x the volume of the combustion zone&flue passages What is the first action 'to be taken when performing an ignition spark response test? - Close test firing valve and pilot valve What is the first thing you must do when using flame simulator on an industrial gas burner? - Close test firing valve What provides the opening force on a diaphragm valve? - Upstream gas pressure What provides the opening force on a regulator? - Spring tension When using an UV flame detector a false flame signal may be produced by? - Ignition spark Where is the high pressure switch to be located on the valve train? - After the second "blocking" valveWhere is the low pressure switch located on the valve train? - After the main gas regulator