CDL Air Brakes Practice Test Results

Question 1
85% answer correctly
You should use the parking brake:
When air brake pressure is low
Whenever you`re traveling down a grade
Whenever you`re parked on a grade
Whenever you`re away from the vehicle
Question 2
50% answer correctly
A safety valve is installed:
On the air compressor
On every air tank connected to the air compressor
On the last air tank connected to the air compressor
On the first air tank connected to the air compressor
Question 3
56% answer correctly
You should be in the proper gear before starting down a hill because:
To keep the brakes cool
To keep your speed under control
It`s difficult to change gears while going downhill
The use of brakes is only a supplement to the braking effect of the engine