Question

if the engine is overheated, the operator should ______.
○ run the engine on high revs for 10 minutes
○ remove the radiator cap and add cold water immediately
○ allow the engine to cool down
○ hose the engine down with cool water

Explanation:

• Running the engine on high revs when overheated will generate more heat, worsening the situation.
• Removing the radiator cap immediately on an overheated engine is dangerous as the coolant is under pressure and can cause burns, and adding cold water suddenly can damage the engine.
• Hosing the engine with cool water can cause thermal shock to engine components, leading to damage.
• Allowing the engine to cool down naturally is the safe and proper procedure to prevent further damage.

Answer:

C. allow the engine to cool down (assuming the options are labeled A, B, C, D with C being "allow the engine to cool down")