Pilots, Pilot, Burners, Thermocouples,thermopiles

Question 1

This pilot burns 24 hours a day seven days a week

Answer 1

Continuous pilot

Question 2

Pilot is always lit, but at a much smaller size than required to light the main burner, on the call for heat the pilot gas supply is increased to enlarge the flame

Answer 2

Expanding pilot

Question 3

This pilot is only ignited when there’s a call for main burner ignition (usually by electronic spark) the pilot remains lit throughout the burner cycle and is extinguished when the main burner cycles off

Answer 3

Intermittent pilot

Question 4

This pilot is ignited when there’s a call for main burner ignition, but extinguishes when the main burner has been ignited

Answer 4

Interrupted pilot

Question 5

This pilot has a primary air opening and a mixing tube which causes a certain volume of air to mix with a certain volume of gas

Answer 5

Aerated pilot

Question 6

This pilot only uses secondary air to achieve combustion, as a slightly yellow flame and must be adjusted so that it is small enough to not cause soot buildup ( blue flame)

Answer 6

Non-aerated pilot burner

Question 7

This pilot has the same flame characteristics as the aerted pilot, but does not have a mixing tube. Therefore is less susceptible to blockage by dust. Burns off any dust or lint present in the air.

Answer 7

Post aerated pilot burner

Question 8

How fast must a pilot flame light the main gas burner

Answer 8

Four seconds

Question 9

This device is energized by the thermocouple or thermal pile and hold the safety gas valve open or safety switch closed

Answer 9

Power unit

Question 10

Standard resistance of a power unit

Answer 10

0.018 ohms

Question 11

You should adjust the pilot flame so the thermal couple produces how many DC millivolts

Answer 11

17 to 32 mV DC

Question 12

Thermopiles on an open circuit can produce voltages ranging from?

Answer 12

250 mV to 1000 mV ( 1 volt)