G2 EXAM. (EXAM 13) with complete solutions

Direct current travels TSSA Q a. Only from the source directly to the load b. Across the load only c. In one direction only d. Only from the load directly to the source c. In one direction only When the voltage has been determined to be approximately 110V, which scale on an analog meter should be selected for the most accuracy? TSSA Q a. 0-600 V b. 0-250 V c. 0-30 V d. 0-125 V b. 0-250 V As gauge number of a conductor increases, its current carrying capacity TSSA Q a. Remains the same b. Decreases c. Increases d. Varies directly b. Decreases The open circuit test reading of a thermocouple should be in the range of TSSA Q a. 25-30 mV b. 800-900 mV c. 2-10 mV d. 250-750 mV a. 25-30 mV A thermopile or power pile generates TSSA Q a. 30090mV b. Hundreds of millivolts c. 0-20 mV d. 20-30 mV b. Hundreds of millivolts The resistance of a heating thermistor does what as its temperature rises TSSA Q a. Varies b. Stays the same c. Fluctuates d. increases e. Decreases e. Decreases A probe type low water cut-off switch is what type of control? TSSA Q a. Pressure sensitive b. Differential pressure c. Normally open d. Normally closed c. Normally open A diode; TSSA Q a. Allows current flow only above a certain applied voltage b. Allows current flow only below a certain applied voltage c. Allows current flow in both directions d. Allows current flow in one direction only d. Allows current flow in one direction only It is permissible to use gas piping as an electrical ground if TSSA Q a. The voltage is less than 120 V b. The piping has welded joints c. The piping is 1" in diameter or larger d. It is used as a flame safeguard circuit d. It is used as