Question

You should not back a tractor under a trailer until the whole air system is:

A. At normal pressure
B. Bled down to half the maximum pressure
C. Between 60-80 psi
D. Empty

Answer 1

For safety and proper brake operation, a tractor should not be backed under a trailer until the air system is at normal pressure, preventing brake failure and ensuring control.

Step-by-step explanation:

You should not back a tractor under a trailer until the air system is at normal pressure. This is crucial for safe operation, as the air system is responsible for controlling the brakes. Underinflated air systems can lead to brake failure, which is dangerous and can cause accidents. It is specifically important that the tractor’s air system is fully pressurized to ensure that the trailer brakes are released and can be operated properly when coupled with the trailer.