CDL Combination Vehicles Practice Test Results

Question 1
73% answer correctly
Where are the shut off valves?
In the tractor cab
At the back of trailers
At the front of trailers
At the back of the tractor
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?
2 psi
1 psi
3 psi
4 psi
Question 3
87% answer correctly
You`re pulling triples and turn suddenly. Which trailer is most likely to turn over?
Middle
All are equally likely to turn over
Rear
Front