Gas 2 practice exam Questions and Answers #2

What is the minimum diameter of a pressure gauge needed to perform leak test on gas piping? A. 2" B. 2 - 3/4" C. 3" D. 3 - 1/2" - c. 3" Amp meter can read what? A. Pressure drop. B. Conductor magnetic field. C. Load in parallel wires. D. Direct power across loads. - B. Conductor magnetic field. What would be the primary voltage of a furnace? A. 120/2/60. B. 24/1/60. C. 120/24/60. D. 120/1/60. - D. 120/1/60. What is the function of an intermittent pilot? A. Shut off after main burner. B. Stay on before and after main burner. C. Power up the thermocouple. D. Stay on during the main burner operation. - D. Stay on during the main burner operation. What is the millivolts power output on a closed circuit test? A. 20 to 30 millivolts. B. 10 to 15 millivolts. C. 2 to 4 millivolts. D. 10 millivolts or less. - B. 10 to 15 millivolts. A pilot with a lazy yellow flame would indicate? A. Orifice too small. B. Mid to high gas pressure. C. Target pilot orifice. D. Orifice size too large. - A. Orifice too small. For flame rectification one of the most important things should be? A. Flame molecules. B. Proper grounding plane. C. Proper air to gas mixture to pilot. D. Flame rod insulator. - B. Proper grounding plane. What makes a flame capillary sensor tube prove pilot to main gas valve? A. Trial for ignition. B. Glow coil. C. Pilot flame. D. Intermittent pilot. - C. Pilot flame. Since 1996 the most common type of home construction? A. Platform. B. Vapour envelope. C. Solid bricks. D. Double platform. - B. Vapour envelope. 10) Can a new installation of a fin type pool heater less than 250,000 btu be install down stair in a house? A. Yes, if gas piping can support gas input. B. No. C. Yes, if pool heater is direct vented. D. Yes, if poll heater is close to chimney. - B. No. 11) When converting oil furnace to gas what type of atmospheric burner can be use? A. Burner tray. B. Inshot. C. Ribbon burner. D. Primary air fan assist burner. - B. Inshot.