🔍 Key Concepts

• diesel engine starting sequence and what is required for ignition • difference between fuel system problems and air or lubrication problems • what a fuel oil trip does in an engine safety system

💭 Think About

• Ask yourself: if the engine is cranking at normal speed, what does that tell you about the condition of the starting air system? • Which option would most directly prevent fuel from being delivered to the cylinders, similar to late fuel injection? • Which choices describe conditions that are more likely to cause mechanical damage or slow cranking, rather than a simple failure to start?

✅ Before You Answer

• Confirm which choice would stop or interrupt fuel flow to the engine, not just change pressure slightly. • Eliminate any options that would likely result in abnormal cranking speed instead of normal cranking. • Think about what condition engine safety trips are designed to create in an emergency: do they usually allow fuel or shut off fuel?