Home / Nova Scotia / Questions / Rules of the Road Rules of the Road Report When using a block heater in NS winter: A Leave plugged in 24/7 B Plug in about 2-4 hours before starting C 5 minutes is enough D Only after engine starts Show Answer & Explanation Correct Answer: B. Plug in about 2-4 hours before starting Timers common in NS to automate. Previous Next More Rules of the Road Questions An exit ramp posts 40 km/h advisory; highway is 100: Correct merging technique onto a NS expressway: NS playground zone speed applies: NS school zone reduced speed applies: A sign reads 'No Turn on Red' at an intersection. You want to turn right: Often Missed All Nova Scotia Questions Smart Practice Mock Exam Road Signs Guide