AirBrakes
What is the most effective way to drain the air tank?
A normal brake application will give you an accurate feel as to whether the brakes are properly adjusted.
Pulling the park control valve (Yellow Button) on the tractor trailer unit will
Air tanks must be drained regularly because
When adjusting the manual slack adjuster which of the following will confirm that the adjustin is being turned correctly
Brake chambers create great application force if
When a spring park brake chamber has been disabled by caging bolt
When air loss from air brakes system exceeds the prescribed limits
When an air brake air supply is out of adjustment
Air tanks must be drained at
When the trailer couplers or glad hands are cross connected
A red trailer supply line failure of an operating Tractor Training Unit with spring park brakes released with result in
When a trailer's service brakes fail to apply, the trailer spring park brakes can be applied using the:
Vehicle with an air brake system must have air pressure gauge that indicate the air pressure level in:
An antilock braking system (ABS) failure is recognized by:
To test air pressure, build up time, the engine should be running at:
The main purpose of an air compressor is to:
Air pressure is used to:
The primary service brake circuit is located:
When inspecting the brake chamber, the driver must check for:
Below Air pressure warning device is activated at:
Spring park brakes can be mechanically caged:
When inspecting brake drums and rotators, the driver must watch for:
If an air failure occurs, the driver must:
Brake system stops vehicle by creating __________ between the lining and brake drum
Brake chamber push rod forces is determined by:
If there is a total loss of air pressure in either the primary or secondary service circuits:
The park control valve is normally:
An Antilock braking system (ABS) uses dash warning lights indicate:
When a low pressure warning device is activated, the driver must:
To prevent the vehicle from moving during an air brake inspection, the driver should use:
The foot valve in an air brake system is used to :
33. To check the air pressure in a vehicle's air system, a driver must:
Compressor build up time from 50 psi to 90 psi (345 to 621kpa) should not exceed:
Maximum air leakage for the power unit with one trailer unit with spring park brakes released and the service brake applied is:
When the brake pedal is pressed, air brakes apply:
Which tank should be drained first:
The part inside spring park brakes that can be hazardous is the:
The appropriate time to do the air brake system pre-trip inspection:
Driving a vehicle with an air brake system that is below the normal operating air pressure range is:
When measuring the applied push rod stroke, air pressure must be between:
To maintain the adjustments of automatic slack adjuster, the driver should:
When using the applied stroke method of inspecting the S-cam brakes, air pressure must be:
Each air brake chamber style type and size have a specific:
The force of services brake application depends on the brake chamber diaphragm and a:
When red line is connected it
The function of air compressor is:
When you are driving in hill area descending then
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