USCG USCG Steam
Set 3 • Question #291 of 496
Launch Interactive Practice Room Which of the following statements represents the purpose of boiler sliding feet?
A
To ensure an airtight seal between the boiler inner and outer casings.
B
To accommodate the changing length of the water drum as it expands or contracts with temperature changes.
✓ Correct Answer
C
To compensate for deflection of the hull in way of the boiler supports.
D
To allow for unequal expansion between the wrapper and tube sheets.
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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