CDL General Knowledge Practice Test Results

Question 1
73% answer correctly
Why is it important to use a helper when backing?
It isn`t important to use a helper when backing
To let you know when you`ve backed far enough
To warn traffic and pedestrians that you`re backing
To provide another set of eyes to avoid blind spots
Question 2
47% answer correctly
There are __________ classes of hazardous materials
6
12
9
3
Question 3
49% answer correctly
What is the minimum tread depth for all tires excepting front tires?
7/16 inch
5/8 inch
4/32 inch
2/32 inch