According to 46 CFR regulations pertaining to tests and inspections as related to automatic auxiliary boilers, the draft limit control must be checked for proper operation. What statement is true?

Correct Answer: Option C — The draft loss interlock switch must be tested to insure that a safety shutdown occurs and a boiler startup is prevented when there is insufficient draft to support combustion.

Title 46 CFR regulations for automatic auxiliary boilers require the draft loss interlock switch to perform dual safety functions. It must verify that startup is prevented and a safety shutdown occurs immediately if insufficient draft compromises combustion safety.