A photoelectric cell is installed in an oil fired boiler safeguard system to introduce proper resistance values to the electronic control circuit. This device is primarily sensitive to __________.
A
light emitted from the back wall incandescent brickwork
B
light emitted from the front wall incandescent brickwork
C
the orange portion of the flame spectrum
D
the blue portion of the flame spectrum
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Question 1 / 205eccefa3bacbc34ba4d47c34
Question 1 of 205eccefa3bacbc34ba4d47c34
A photoelectric cell is installed in an oil fired boiler safeguard system to introduce proper resistance values to the electronic control circuit. This device is primarily sensitive to __________.
A photoelectric cell is installed in an oil fired boiler safeguard system to introduce proper resistance values to the electronic control circuit. This device is primarily sensitive to __________.