USCG USCG Steam
Set 4 • Question #342 of 496
Launch Interactive Practice Room A corbel is used in a boiler furnace to __________.
A
protect the expansion
✓ Correct Answer
B
joints reduce gas turbulence
C
direct the flow of gases
D
contain the furnace heat
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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