Gas Fitter 2 Practice Test - Questions and Answers

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Gas Fitter 2 Practice Test - Questions and Answers Installation of one 400,000 btu natural draft boiler in a tight enclosure would require an air supply opening of? A. 114 sq in B. 50 sq in C. 58 sq ... in D 112 sq in With the installation of a 75,000 btu atmospheric hot water tank in a tight house, how much free air is required when using a round duct? A. 11" B. 4" C. 7" D. 3" A portable infrared heater that cannot be interlocked shall be connected to a: A. CO2 monitor alarm B. CO monitor alarm C. O2 monitor alarm D. CO and O2 monitor alarm A coil type boiler less than 400 MBtu would need a: A. Spill switch and Low water cut off B. Low water cut off and hi limit C. Flow sensor and hi limit D. Spill switch and hi limit What does a barometric damper control? A. Excess Air B. Pilot Air C. Draft Air D. Ventilation Air A bellows gas meter is also known as a? A. Down stream displacement meter B. Up stream displacement meter C. Pressure displacement meter D. Positive displacement meter On a high efficiency furnace, what turns on the blower fan? A. Klixon limit B. Bi-metal switch C. Relay timer D. Temperature A vent-limiting orifice is only allowed to approximately discharge how much gas in a 24-hour period? A. 1 cubic foot B. 10 cubic feet C. 20 cubic feet D. 24 cubic feet 199. What would be the input of a 0.60-gph-oil nozzle? A. 73 MBtu B. 70 MBtu C. 84 MBtu (140 000 x .60) D. 50 MBtu For a freestanding propane range in a large kitchen, the flexible connector may be how long? A. 10 ft. B. 6 ft C. 4 ft. D. 8 ft. if range is in the center of the kitchen When venting spillage occurs and flue gases passes back through combustion zones what change occurs? A. Flue gases are hotter and rise faster through chimney B. Flue CO2 gases are more efficient C. Flue CO2 gases changes to N2 D. Flue CO2 gases changes to CO Venting spillage can be caused by? A. Improper combustion air mixture B. Excessive elbows in venting system C. Cracked heat exchanger D. Blocked condensate furnace drain A commercial forced air furnace uses a ___________ form of heat transfer to heat a home A. radiant B. conductive C. convective D. thermal 193. What monitors water flow in a pool heater? A. Aquastat B. Low water cut off C. Pressure switch D. Flow switch A propane service regulator would normally deliver pressure at A. Pound to 11 in. w.c. B. Ounces to 7 in. w.c. C. Ounces to 11 in. w.c. D. Pound to 7 in. w.c. An inverted sensor (measures water level) can be found operating what type of appliance? A. Hot water boiler B. Steam water boiler C. Domestic hot water storage tank D. Domestic potable hot water tank For a freestanding propane range in a large kitchen, the flexible connector may be how long? A. 10 ft. B. 6 ft C. 4 ft. D. 8 ft. if range is in the center of the kitchen A fan assist burner is? A. Designed for better combustion B. Designed for conversion boiler C. Designed to overcome appliance friction D. Designed to overcome burner resistance Which gas meter would be used for a small or mid size commercial installation? A. Rotary type B. Tubing type C. Bellows type D. Orifice On a regulator, what senses (measures) outlet pressure? A. Restricting element B. Measuring element C. Loading element D. Spring element What is the relief valve setting on a propane cylinder (BBQ) A. 375 PSI B. 250 PSI C. 175 PSI D. 35 PSI What is the relief valve setting on a propane tank (pressure vessel) A. 375 B. 250 C. 175 D. 35 What is the output pressure (maximum output pressure) from a first stage regulator? A. 11.0" w.c. B. psi C. 10.0 psi D. 15.0 psi What does a gas pressure regulator control? A. controls inlet pressure B. controls gas flow C. Controls downstream pressure D. Locks out gas flow Clocking a 5 foot dial on a gas meter for 63 seconds what would be the appliance input? [Show More]

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