Proper air brake adjustment on a vehicle equipped with foundation brakes is determined by?

What will occur if the supply line is ruptured?

Tractor protection systems must shut off air supply to the trailer when?

In a dual circuit air system, what valve is used to protect the primary circuit from an air loss in the secondary circuit?

In a dual circuit air system, air from both the primary and secondary air reservoirs is directed to?

In the event of air loss in one circuit of a dual circuit air brake system, the remaining circuit will?

What two valves make up the tractor protection system?

Which will cause trailer brakes to apply immediately?

A leak at the hand valve exhaust port when the foot valve is applied would most likely be caused by?

In a dual circuit system, the primary circuit supplies air to?

If slack adjuster travel is checked on a Type 30 brake chamber with a manual slack adjuster during a brake application, travel should not exceed?

Which valve is octagon-shaped (eight-sided), red and located on the dash in the truck?

If the foot valve and hand valve are operated at the same time, the trailer application pressure will be?

The main purpose of the tractor protection valve is?

“ Brake lag” is approximately 4/10 of a second in a well-maintained brake system; What is meant by the term brake lag?