Why should water alone never be used permanently as engine cooling fluid?
Answer and explanation
Correct answer: A. Water freezes, boils at lower temperature, and causes severe internal rust
- Step 1: Limitations of plain water. Step 2. Plain water freezes and cracks engine blocks, boils at 100°C causing overheating, and rusts water pumps and channels. Answer: Water freezes, boils at lower temperature, and causes severe internal rust. Why not the others: Coolant loop is sealed from exhaust; coolant does not mix with oil under normal conditions; battery is unaffected.
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