USCG USCG Steam
Set 11 • Question #79 of 496
Launch Interactive Practice Room Ultraviolet light sensing flame scanners installed on an automated main propulsion boiler, are designed so they __________.
A
might be misled by glowing brickwork
B
will be sensitive to the outer portion of flames
C
are sensitive only to the center of the ultraviolet portion of the flame from a particular burner
✓ Correct Answer
D
cannot be used with steam atomizing burners
USCG NMC Regulatory Explanation
In USCG Steam Plants (Boilers & Turbines), regarding 'Ultraviolet light sensing flame scanners installed on an automated main propulsion boiler, are designed so they', the verified engineering fact is: 'are sensitive only to the center of the ultraviolet portion of the flame from a particular burner'.
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