Which warning plate is correctly mounted?

You answered correctly. For warning plates on vehicles with oversize or projecting parts, the stripes must slope downward to the outside. In the picture, the right warning plate is correctly mounted with the stripes falling outward. The left plate is incorrect because its stripes slope the wrong way. Always remember: stripes go down and outwards to the sides of the vehicle; this helps other drivers recognize the vehicle’s width or projection. This rule helps with safety and visibility on the road.