USCG USCG Steam
Set 15 • Question #183 of 496
Launch Interactive Practice Room Longitudinal expansion of a boiler water drum is allowed for at the boiler __________.
A
tube sheet
B
casing joints
C
foundation sliding feet
✓ Correct Answer
D
refractory expansion joint
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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