USCG Exam PracticeLube oil and fuel oil systems
Federal regulations require that valves installed on the outside of oil tanks be made of which materials?
- A. Gray cast iron, bronze, or Schedule 80 carbon steel.
- ✓ Steel, ductile cast iron ASTM F1155, or a ductile nonferrous alloy with a melting point above 1,700 °F.Correct
- C. Stainless steel or copper-nickel alloy regardless of melting point.
- D. Any listed material in ASTM F1155 including gray cast iron when installed with remote control.
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 with a melting point above 1,700 °F. Gray cast iron is permitted only for valves installed inside the tank under §56.50-60(d)(2), not on the outside.
Cited:46 CFR §56.50-60(d)(1)