Wisconsin CDL permit (CLP) knowledge tests — Practice

Question 1

What tells you how much pressure is in your vehicle's air tanks?

Accepted Answer

The supply pressure gauge

Question 2

A placard should be placed:

Accepted Answer

At least three inches away from any other markings.

Question 3

If a gate controlling a railroad crossing does not go back up after a train passes, you should:

Accepted Answer

Call your dispatcher.

Question 4

Trailers with low underneath clearance may be difficult to drive:

Accepted Answer

Over railroad crossings.

Wisconsin CDL permit (CLP) knowledge tests — practice