How does the flame rod sense the flames in a flame rectification circuit?
A) The flame rod expands from being heated, making a mechanical switch at its base
B) The flame rod is made of a semiconductor material that acts as a silicon controlled rectifier when it is hot
C) The resistance of the flame rod changes when heated by the flame
D) The flame changes the AC voltage to pulsed DC current
D
You might also like to view...
In the fall, remove dead asparagus plant tops and work them into the soil
Indicate whether the statement is true or false
The use of a ________________ is a requirement if the operating temperature of the hydraulic oil will exceed 180° F (82° C) at the motor case drain.
Fill in the blank(s) with the appropriate word(s).
Hazardous (classified) locations divide atmospheric identifications for Class I, Divisions 1 and 2, locations into ____.
A. Groups 1A and 2A B. Categories A and B C. Categories A, B, C and D D. Groups A, B, C, and D
A wide band oxygen sensor was first used on a Honda in what model year?
A) 1996 B) 2006 C) 1992 D) 2000