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 materials?
- A. Gray cast iron, bronze, or galvanized steel
- ✓ Steel, ductile cast iron ASTM F1155, or a ductile nonferrous alloy with a melting point above 1,700 °FCorrect
- C. Copper-nickel alloy, stainless steel, or aluminum bronze
- D. Any material rated for the working pressure of the system
Why B is correct
46 CFR §56.50-60(d)(1) specifies that valves installed on the outside of oil tanks must be made of steel, ductile cast iron ASTM F1155, or a ductile nonferrous alloy having a melting point above 1,700 °F. Gray cast iron and aluminum are not listed as acceptable materials for this application.
Cited:46 CFR §56.50-60