USCG Exam PracticeLube oil and fuel oil systems
Under 46 CFR §56.50-60(d)(1), valves installed on the outside of oil tanks must be made of which of the following materials?
- A. Cast iron, ductile cast iron, or any nonferrous alloy
- ✓ Steel, ductile cast iron ASTM F1155, or a ductile nonferrous alloy with a melting point above 1,700 °FCorrect
- C. Seamless steel or copper-nickel alloy with a melting point above 1,000 °F
- D. Steel or ductile cast iron only; nonferrous alloys are not permitted on tank valves
Why B is correct
46 CFR §56.50-60(d)(1) specifies that valves on the outside of oil tanks must be steel, ductile cast iron ASTM F1155, or a ductile nonferrous alloy having a melting point above 1,700 °F. Plain cast iron is only permitted for valves installed inside the tank per §56.50-60(d)(2).
Cited:46 CFR §56.50-60(d)(1)