CDL Combination Vehicles Practice Test Results

Question 1
87% answer correctly
In which of the following circumstances should the valve hand be used to park a combination vehicle?
When unloading
When parking for less than 10 minutes
Never
When parked on a grade
Question 2
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
When you start to recover from the jackknife
As soon as you start to jackknife
Never
Question 3
96% answer correctly
To reduce the risk of rollover when driving a combination vehicle:
Concentrate the cargo at the front and back of the rig
Keep the cargo as far away from the ground as possible
Concentrate the cargo to one side of the rig
Keep the cargo as close to the ground as possible