CFESA GAS

GAS TRAINING CHAPTER 11 - THERMOCOUPLES & THERMOPILES EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED How does the thermocouple operate? When two separate metals are welded together on one end and then heated, an electrical current is produced. What is a thermopile? A thermopile is a device made of 26 thermocouple elements giving the thermopile a high DC millivolt output. What is the proper no-load output of a thermocouple? 30 to 35 mV What is the proper no-load output of a the...

GAS TRAINING CHAPTER 3 - COMBUSTION AIR EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE Practice questions for this set In a confined space, combustion air openings must be located where? 12 inches from the floor and 12 inches from the ceiling. The minimum area allowed for a fresh air opening is what size? 100 square inches.

GAS CFESA PRACTICE TEST EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED Terms in this set (100) The purpose of a draft hood/draft diverter is ? A) To prevent drafts from entering the burner compartment that comes from the power cent hoods. B) To prevent the combustion chamber from overheating, and allowing air to come down the vent pipe into the room. C) To allow the flue to control the amount of secondary air drawn in instead of the vent pipe, and to prevent air from ...

CFESA GAS - CH13 COMBI GAS VALVES EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED A combination gas valve combines what four separate components into a single control? Manual shut off valve, safety valve, pressure regulator, solenoid valve. What does a solenoid coil portion of a combination gas valve actually control? A rocker arm to control the working gas Describe the operation of the pressure regulator section of a combination gas valve It regulates the working gas pressure a...

14 CFESA GAS CHAPTER 14- GAS THERMOSTATS EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED 1.) How is a BJ thermostat mounted into the equipment? With the flanged bracket that screws into the gas manifold. 2.) When mounting a BJ thermostat to a flange, what must you be careful of? You must make sure that the quad ring used to seal the flange to the thermostat is positioned properly in the flange. 3.) What is a bypass flame? The smallest flame that will keep the burner totally lit....

6 CFESA GAS CHAPTER 6- GAS PIPING EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED 1.) What does the gas code state regarding gas piping size? The code states that the pipe must be sized to handle the maximum volume of all the equipment attached to it plus needs for the foreseeable future. 2.) What kind of pipe must be used on natural gas lines? Black iron pipe is mandated by most local jurisdictions. Some jurisdictions may make exceptions for the use of CSST or other materials. ...

CFESA GAS - CH14 GAS THERMOSTAT EXAM QUESTION AND ANSWERS WITH COMPLETE SOLUTIONS How is a BJ thermostat mounted into the equipment? With the flanged bracket that screws into the gas manifold When mounting a BJ thermostat to a flange, what must you be careful of? You must make sure that the quad ring used to seal the flange to the thermostat is positioned What is a bypass flame? Is the smallest flame that will keep the burner totally lit What is the correct procedure for adjusting a bypa...

CFESA GAS - CH 6 GAS PIPING EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED What does the gas code state regarding gas piping size? The pipe must be sized to handle max volume of all equip attached plus needs for foreseeable future. What kind of pipe must be used on natural gas lines? Black iron pipe is mandated by most local jurisdictions. Some jurisdictions may make exceptions for use of CSST or other materials. What materials can be used for LP gas lines? Black iron pipe is t...

CFESA GAS - CH 2 COMBUSTION EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE Practice questions for this set What are the 3 things needed for combustion? Fuel, oxygen, and heat What at are the 3 byproducts of complete combustion? Nitrogen, carbon dioxide, and water vapor. One cubic foot of natural gas requires how much air to burn? Minimum of 10 How much byproducts are left after burning one cubic foot of natura...

CFESA GAS - CH 5 GAS PRESSURE EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE Describe in detail how you will determine if a gas problem is a pressure problem or a volume problem. Use Manometer to measure gas pressure with all equip turned off. Than, turn on one piece at a time & monitor gas pressure. If pressure continues to drop each time additional equipment is turned on, gas volume is the problem. Why are so many gas lines undersized? 1) additional equipment not...