Question

4 multiple choice 1 point the component used by an external combustion engine to burn a fuel source is called a ____? hot box fire box cylinder boiler 5 multiple choice 1 point combustion heat is released when hydrogen and carbon atoms allow __ to attach to them. methane oxygen hydrogen vapor 6 multiple choice 1 point the shortest duration stroke of a four - stroke diesel engine is the ____ stroke. power intake exhaust

Explanation:

• For question 4, in an external - combustion engine, the fire box is the component where the fuel source is burned.
• For question 5, combustion is a reaction with oxygen. When hydrogen and carbon atoms react with oxygen, heat is released.
• For question 6, in a four - stroke diesel engine, the power stroke is the shortest in duration as it is the stroke where the high - pressure gases push the piston down quickly to generate power.

Answer:

1. B. Fire box
2. B. Oxygen
3. A. Power