GAS CFESA PRACTICE TEST EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED

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 coming back down the vent into the combustion chamber D) To allow the vent pipe to control the amount of secondary air drawn into the combustion chamber as designed by its height above the hood. C The two primary functions of the flue are ? A) The remove combustion byproducts and heat from the equipment B) To create a draft to pull in secondary air and remove the byproducts form the combustion chamber C) To create a draft to keep the burners cool and remove byproducts from the cooking area D) To remove the excessive heat to keep the burners, and cooking surface from overheating B To solve unusual venting problems like negative pressure, high winds, long vents, the installe should use ? A) A larger size vent pipe B) Vent outlets C) Vent top turbines D) A draft hood D What is a bypass flame? A) The smallest flame that will keep the burners lit after the gas thermostat has reached the temperature set point B) A flame that is 3/8" tall after the thermostat shuts off C) A flame left on the burner to keep the pilot form going out D) A flame to a special part of the burner after the main burner goes off A The primary purpose of a vent on a regulator is to: A) Vent leaking gas B) Allow diaphragm movement C) Allow high pressure D) Monitor flow B A properly burning infrared ceramic burner will look ? A) Blue B) Bright reddish orange C) Dull red D) Blue with a tint of orange B Vent lines are required on regulators above 1" and must be vented: A) A pilot flame B) An open flame within 2 feet C) A working flue or exhaust system D) The outside atmosphere, above the snow line D What is the proper flame current for an ignition module? A) Always 3 or more microamps B) Always ¼ or more microamps C) It depends on the module manufacturer D) Always 2 or more microamps C Primary air is the air ? A) That surrounds the burner B) That enters the burner though the venture C) Is the air that is vented through the exhaust system D) That must always have a pressure greater than the incoming gas pressure B Every time a gas fired convection oven shuts off the gas flow to the burners there is a loud pop. The oven is rated for and using LP gas. The noise is called , and can be reduced by the burner air shutters more. A) Extinction pop, opening B) Delayed ignition, closing C) Delayed ignition, opening D) Extinction pop and by closing D If a leak develops in an LP gas line, where is the gas likely to go? A) Out the exhaust system B) To the lowest level in the room C) Up to the ceiling area D) Out of the kitchen under the door B The approximate amount of BTU's produced by burning one cubic foot of natural gas is? A) 10,000 B) 2500 C) 750 D) 1000 D The normal operating pressure of LP gas is ? A) 10-15 psi B) 3-7 psi C) 10-11 in WC" D) 3-7 in WC" C The normal operating pressure of a typical natural gas type burner is approximately: A) 15-25 psi B) 3-4 psi C) 10-11 in WC" D) 3.5-7 in WC" D Make up air is: A) The air that enters the venture of the burner B) The air that mixes with the gas at the burner ports C) The air that enters the room from the outside D) The air that is taken out through the vent C LP gas, at the appliance, is ? A) Heavier than air B) Light yellow C) Lighter than air D) Odorless A Ideally to burn one cubic foot of LP gas approximately cubic feet of air is required. A) 100 B) 24 C) 10D) 44 B Natural gas coming out of a gas line piped into a building is: A) Heavier than air B) Light yellow C) Lighter than air D) Odorless C Ideally 100 cubic feet of natural gas is burned, approximately feet of air is required for proper combustion. A) 100 B) 500 C) 1000 D) 6000 C