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What is the purpose of using the engine block heater or parking in a sheltered spot on very cold nights?
- A.To charge the trailer lights
- B.To prevent the cargo from freezing in all cases
- C.To keep the engine warm enough for reliable starting and quicker oil circulation in the morning
- D.To extend the hours-of-service clock
Correct answer
C. To keep the engine warm enough for reliable starting and quicker oil circulation in the morning
Why
Cold-soaked engines crank slowly because batteries weaken and oil thickens at the same time. Keeping the block warm protects starting reliability and reduces the heavy wear of a hard cold start.
Manual topic: Winter Driving - Starting · From the General Knowledge practice bank (GK-297).