CDL Combination Vehicles Practice Test Results

Question 1
73% answer correctly
Where are the shut off valves?
At the back of the tractor
At the front of trailers
At the back of trailers
In the tractor cab
Question 2
73% answer correctly
What is the maximum amount of air that a combination vehicle air brake system should leak in one minute with the brakes released and the engine off?
1 psi
2 psi
3 psi
4 psi
Question 3
90% answer correctly
Which of the following statements about combination vehicles is true?
Driving combination vehicles is no different than driving single commercial vehicles
Single commercial vehicles are heavier, longer and require more driving skill than combination vehicles
All of these are true
They`re heavier, longer and require more driving skill than single commercial vehicles