Home / Quebec / Questions / Rules of the Road Rules of the Road Report An engine block heater in extreme cold: A Is unnecessary B Preserves engine + eases starting — plug in 2-3 hours C Is dangerous D Only for diesel Show Answer & Explanation Correct Answer: B. Preserves engine + eases starting — plug in 2-3 hours Block heater: 2-3 hours before start. Previous Next More Rules of the Road Questions A funeral procession passing by: Before moving across a pedestrian's path: The posted maximum speed limit: If you need to turn left at an next intersection: At night, you should: Often Missed All Quebec Questions Smart Practice Mock Exam Road Signs Guide