Which safety precaution should be followed when servicing fuel metering components?

• A. Work in a well-ventilated area
• B. Disconnect power, relieve pressure, and keep fuel away from ignition sources
• C. Wear gloves
• D. Ensure power remains connected

Answer: (B)

When servicing fuel metering components, the highest priority is to eliminate the dangers from electricity, fuel pressure, and flammable vapors. Disconnecting power removes the chance of sparks or unintended actuation of the fuel system, relieving pressure prevents fuel from spraying or leaking when you open components, and keeping fuel away from ignition sources reduces the risk of fire or explosion from any vapors that might be present. These steps directly address the main hazards of working with energized, pressurized fuel systems.

Extra measures like working in a well-ventilated area help control vapors, and wearing gloves adds skin protection, but they don’t resolve the immediate risks posed by live electrical circuits and pressurized fuel. Leaving power connected would keep those hazards active, which is unsafe.