USCG USCG Steam
Set 13 • Question #141 of 496
Launch Interactive Practice Room 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
✓ Correct Answer
USCG NMC Regulatory Explanation
In USCG Steam Plants (Boilers & Turbines), regarding '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', the verified engineering fact is: 'the blue portion of the flame spectrum'.
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