USCG USCG Steam
Set 4 • Question #330 of 496
Launch Interactive Practice Room A corbel in the furnace of a water-tube boiler is a fillet of plastic refractory used as a __________.
A
means of excluding slag from the joints at the furnace floor, walls, and corners
✓ Correct Answer
B
preformed burner arch section
C
foundation for refractory anchor bolts
D
set of gas baffles in the screen tubes
USCG NMC Regulatory Explanation
In water-tube boiler furnace brickwork, a corbel is a stepped fillet or projection of plastic refractory or firebrick built along wall-to-drum junctions to shield water drum seams and tube joints from direct burner flame impingement.
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