Damage to the fuel system could result if refueling hose pressure exceeds __ PSI during pressure refueling or __ PSI during closed circuit refueling.

Damage to the fuel system could result if refueling hose pressure exceeds __ PSI during pressure refueling or __ PSI during closed circuit refueling.

• A. 60 PSI; 20 PSI
• B. 50 PSI; 10 PSI
• C. 65 PSI; 25 PSI
• D. 55 PSI; 15 PSI

Answer: (D)

The fuel system is protected by defined maximum pressures for different fueling methods to prevent over-pressurization of hoses, fittings, and tanks. In pressure refueling, the system can handle a higher delivery pressure, but it must be kept below about 55 psi to avoid stressing the fuel lines and components. In closed-circuit refueling, the flow is more controlled and kept at a much lower pressure, about 15 psi, to minimize surge and prevent damage to the tank fittings and relief/vent paths. Exceeding these limits risks fuel leaks, hose or fitting ruptures, and potential damage to the fuel system. The numbers 55 psi for pressure refueling and 15 psi for closed-circuit refueling align with the UH-60S limits, making this option the best choice.

The fuel system is protected by defined maximum pressures for different fueling methods to prevent over-pressurization of hoses, fittings, and tanks. In pressure refueling, the system can handle a higher delivery pressure, but it must be kept below about 55 psi to avoid stressing the fuel lines and components. In closed-circuit refueling, the flow is more controlled and kept at a much lower pressure, about 15 psi, to minimize surge and prevent damage to the tank fittings and relief/vent paths. Exceeding these limits risks fuel leaks, hose or fitting ruptures, and potential damage to the fuel system. The numbers 55 psi for pressure refueling and 15 psi for closed-circuit refueling align with the UH-60S limits, making this option the best choice.