Practice question

Why check clearance between tractor frame and landing gear?

It proves trailer is empty
It replaces tug test
It opens protection valve
The tractor must not hit landing gear during turns

Answer: D — The tractor must not hit landing gear during turns

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: Iowa CDL Combination Vehicles Test Practice Questions - Iowa Commercial Driver License Combination Vehicles Test Exam →