CDL Combination Vehicles Practice Test Results

Question 1
89% answer correctly
When is the proper time to use the trailer handbrake to straighten out a trailer that`s jackknifing?
Never
When you start to recover from the jackknife
In the middle of the jackknife
As soon as you start to jackknife
Question 2
90% answer correctly
Which of the following statements about combination vehicles is true?
Single commercial vehicles are heavier, longer and require more driving skill than combination vehicles
They`re heavier, longer and require more driving skill than single commercial vehicles
All of these are true
Driving combination vehicles is no different than driving single commercial vehicles
Question 3
87% answer correctly
In which of the following circumstances should the valve hand be used to park a combination vehicle?
When parking for less than 10 minutes
When parked on a grade
When unloading
Never