• 1. Explain what a Fuel system does and list five components that make up the system.
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• 2. Explain what an Air supply system does and list the components that make up the system 
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• 3. Explain the basic operation of a Four Stroke Diesel engine. 
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• 4. List the three types of Oil and explain their application: 
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• 5. What are the two types of Oil filtering systems and how do they work? 
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• 6. Briefly explain the two types of Oil Filters. 
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• 7. Explain the five-step procedure for inspecting an engine for oil and fluid leaks.