CDL Air Brakes Practice Test Results

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