USCG USCG Steam
Set 2 • Question #276 of 496
Launch Interactive Practice Room Longitudinal expansion of a boiler water drum is permitted by the __________.
A
tubes
B
casing
C
foundation
✓ Correct Answer
D
refractory
USCG NMC Regulatory Explanation
Main propulsion boilers are installed with sliding feet (slotted holding-down bolts) on one end of the water drum saddles to accommodate thermal expansion and contraction during heating and cooling, preventing structural damage to hull foundations.
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