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?
In the middle of the jackknife
As soon as you start to jackknife
When you start to recover from the jackknife
Never
Question 2
90% answer correctly
Which of the following statements about combination vehicles is true?
All of these are true
They`re heavier, longer and require more driving skill than single commercial vehicles
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
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