In which vehicle is it permitted to transport loose ash and bulk cement?

1. Correct answer: Only in a vehicle specially designed for this work
2. In every commercial vehicle.
3. In every open vehicle for the transport of bulk powders.
4. In a special vehicle equipped with a blower.

WhyLoose ash and bulk cement may be carried only in a vehicle specially designed for this. In an ordinary open body they would blow all over the road.