🔍 Key Concepts

• Stationary parts vs. moving parts of a diesel engine • Purpose of engine block, frame, and main bearings • How support and alignment affect engine operation

💭 Think About

• Think about which components of a diesel engine actually move and which do not. What role do the non-moving parts play? • If the crankshaft, pistons, and connecting rods are the moving parts, what must the stationary parts do so these can operate correctly? • Which answer choices describe actions that sound like movement or adding power, and which sound like support or alignment?

✅ Before You Answer

• Identify which answer choices describe movement or rotation and set them aside. • Look for the option that focuses on supporting and positioning other parts rather than creating power. • Ask yourself: Do stationary parts themselves add power or rotate, or do they mainly hold and guide the moving parts?