🔍 Key Concepts
• On a diesel engine, speed is controlled by the amount of fuel injected, not by restricting air like a gasoline throttle
• Look for the governor and its linkage to the fuel pump/rack in the illustration
• Identify which labeled component is actually able to change fuel delivery to all cylinders
💭 Think About
• Which of the labeled parts (C, D, E, G) is connected to the fuel injection pump or fuel control rack rather than to air, exhaust, or lubrication systems?
• If the bridge ordered more RPM, which part in the illustration would physically move to increase fuel to the engine?
• Which component appears to be part of a governor or control mechanism rather than a passage, valve, or simple fitting?
✅ Before You Answer
• Verify which choice is directly linked to the fuel injection control mechanism (rack, pump, or governor)
• Confirm that the component you pick is not just a fuel line, oil line, or passage with no moving control linkage
• Check that the component you choose could plausibly act on all cylinders together, not just on one local point.