AM
GAS TRAINING CHAPTER 11 - THERMOCOUPLES
& THERMOPILES EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS
VERIFIED
When two separate metals are welded together on one
How does the thermocouple
end and then heated, an electrical current is produced.
operate?
A thermopile is a device made of 26 thermocouple
What is a thermopile?
elements giving the thermopile a high DC millivolt
output.
What is the proper no-load 30 to 35 mV
output of a thermocouple?
What is the proper no-load 750 mV
output of a thermopile?
What is the hot junction of The welded end of the two metals that is heated.
a thermocouple?
The DC voltage generated by The temperature difference between the hot junction and the
a cold junction.
thermocouple or thermopile is
in direct proportion to what?
How do you test the no-load Connect 1 m lead to the copper tube and the other to
output of a thermocouple? the end of the thermocouple tip.
How tight should the nut on Hand tight plus approximately 1/4 turn.
the end of the
thermocouple be
tightened?
1/
2