Class 5 Practice Results - #1. If you have to stopped behind a large truck facing uphill, you should leave extra space in front of Your vehicle? Keep more distance behind the truck. Keep more distance behind the truck. Truck engine can turn off at uphill. Truck engine can turn off at uphill. Truck can block your vision to see ahead. Truck can block your vision to see ahead. Truck can roll backwards when driver releases brakes. Truck can roll backwards when driver releases brakes. Next