USCG Exam PracticeLube oil and fuel oil systems
A vessel's lubricating oil system sight-flow glasses are being evaluated for compliance. Under federal regulations, what fire-resistance performance must these sight-flow glasses meet?
- ✓ They must withstand a flame at 927 °C (1,700 °F) for one hour without appreciable leakageCorrect
- B. They must withstand a flame at 500 °F for 30 minutes without appreciable leakage
- C. They must be constructed of seamless steel and require no flame testing
- D. They must be replaced with steel-bodied gauges and are not permitted in lube oil systems
Why A is correct
46 CFR §56.50-80(h) permits sight-flow glasses in lubricating-oil systems provided they can withstand exposure to a flame at 927 °C (1,700 °F) for one hour without appreciable leakage. The other temperature and time values are not specified in the regulation.
Cited:46 CFR §56.50-80