USCG Exam PracticeLube oil and fuel oil systems
A valve installed on the outside of a fuel oil tank to comply with 46 CFR §56.50-60(d) must be made of which material, and what dual means of operation is required?
- A. Cast iron; remote control only, with no local manual requirement
- ✓ Steel, ductile cast iron ASTM F1155, or a ductile nonferrous alloy with melting point above 1,700 °F; both local manual control at the valve and remote control from outside the compartmentCorrect
- C. Seamless steel only; local manual control at the valve is sufficient with no remote requirement
- D. Steel or ductile cast iron; remote control only from the machinery control room
Why B is correct
46 CFR §56.50-60(d)(1) specifies that valves installed 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, and must be arranged with both local manual control at the valve and remote control from a readily accessible and safe location outside the compartment. Cast iron with remote control only applies to valves installed inside the tank per §56.50-60(d)(2).
Cited:46 CFR §56.50-60