USCG USCG Motor
Set 3 • Question #197 of 382
Launch Interactive Practice Room When replacing tubes in a water-tube auxiliary boiler, to eliminate the possibility of leaks at the tube seats, the replacement tubes should be __________.
A
stress relieved to ensure expansion when rolled
B
annealed to prevent cracking when rolled
C
fitted with a welded backing ring in the seat area
D
rolled, beaded, and seal welded around the bead edge
✓ Correct Answer
USCG NMC Regulatory Explanation
In USCG Motor Plants (Diesel Engineering), regarding 'When replacing tubes in a water-tube auxiliary boiler, to eliminate the possibility of leaks at the tube seats, the replacement tubes should be', the correct operational principle is: 'rolled, beaded, and seal welded around the bead edge'.
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