USCG Exam PracticeAuxiliary machinery and mechanical systems
Under 46 CFR, what is the minimum fire resistance requirement for sight-flow glasses used in lubricating-oil systems?
- A. Withstand exposure to a flame at 927 °C for 30 minutes without appreciable leakage
- B. Withstand exposure to a flame at 760 °C for one hour without appreciable leakage
- ✓ Withstand exposure to a flame at 927 °C for one hour without appreciable leakageCorrect
- D. Withstand exposure to a flame at 1,100 °C for 30 minutes without appreciable leakage
Why C is correct
46 CFR §56.50-80(h) specifies that sight-flow glasses may be used in lubricating-oil systems provided they can withstand exposure to a flame at a temperature of 927 °C (1,700 °F) for one hour without appreciable leakage.
Cited:46 CFR §56.50-80