CDL Combination Vehicles Practice Test Results

Question 1
84% answer correctly
You`re cranking up the front trailer supports after coupling a trailer. Which of the following is the proper final support and handle configuration?
Fully raised with the crank handle secured
3/4 raised with the crank handle removed
Fully raised with the crank handle removed
3/4 raised with the crank handle secured
Question 2
94% answer correctly
To avoid rollovers:
Drive slowly on on-ramps and off-ramps
Avoid quick lane changes
All of these are correct
Drive slowly around corners
Question 3
60% answer correctly
After pushing in the trailer supply valve you should not move the tractor until:
The entire air system is above 120 psi and the warning buzzer has stopped
The entire air system is above 60 psi and the warning buzzer has stopped
The warning buzzer has stopped
The entire air system is above 120 psi