If a trailer that DOES NOT have spring brakes breaks away from a tractor, the trailer brakes must hold in a full emergency application for a minimum of?

What valve supplies air to the trailer reservoir?

A pressure protection valve is used to?

A trailer hand valve should only be used to?

If there was a slight air leak coming from the glad hands the driver might be able to correct this condition by?

Air lines should be attached to the trailer without spring brakes prior to backing under, then?

Brake adjustment is best checked by?

In most trailers the reservoir is filled with air through the?

How are the spring brakes affected when brakes are out of adjustment?

The valve that causes the trailer brakes to apply immediately if the trailer breaks away is called?

The most common cause of air loss in a tractor-trailer system is?

When the trailer without spring brakes is disconnected and left parked, the driver should?

When the supply line is broken, tractor pressure should not drain below?

When a trailer without spring brakes is left parked, the wheels must be blocked because?

If the service line to the trailer ruptures or develops a leak while the vehicle is in service, the trailer brakes will apply immediately?