General Knowledge Practice Test
Question #1 of 67
What is black ice?
Black ice is ice that turns black in extreme temperatures.
Black ice is ice that is more slippery than white ice.
Black ice is a thin layer of ice that is clear enough that you can see the road underneath it, making the road look wet.
Black ice is a thick layer of ice that is hard to see on a blacktop road.
None of the above.
The CDL General Knowledge Practice Tests