Describe What the Trailer Air Supply Does

Describe what the trailer air supply control does. Describe what the trailer air supply control does.

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If you do not pass you can take the.

. It is a yellow six-sided knob used to control the tractor protection valve. You will need to achieve a score of 80 or higher to pass this practice test. It is used to supply the trailer with air shut the air off and put on the trailer emergency brakes.

What is the purpose of the emergency air supply line. It is a device used to keep the trailer behind the tractor. Why should you never use the trailer hand valve while driving.

How can you test that air flows to all trailers. First it supplies air to the trailer air tanks. Supply air will cause all brakes to release and the truck will roll freely without any braking ability.

What is the emergency air line for. Air pressure is sent from the air tanks to the brakes by relay valves. Push it in to supply the trailer with air and pull it out to shut the air off and put on the trailer emergency brakes.

Answer You push it in to supply the trailer brakes with air and pull it out to shut off the. What might happen if the trailer is too high when you try to couple. If your vehicle is equipped with dummy couplers why should you connect the glad hands to them.

What is the Crack the whip effect. Controls the tractor protection valves Describe what the service line is for. If your vehicle is equipped with dummy couplers why should you connect the glad hands to them.

Loss of air pressure in the emergency line causes the trailer emergency brakes to come on. Describe what trailer air supply control does. Each trailer and converter dolly has one or more air tanks.

The emergency line also called the supply line has two purposes. It is a yellow six sided knob used to control the tractor protection valve. Second the emergency line controls the emergency brakes on combination vehicles.

It is used to supply the trailer with air shut the air off and put on the trailer emergency brakes. Describe what the trailer air supply control does. You are coupling a tractor to a semi trailer.

Push it in to supply the trailer with air pull it out to shut the air off and put on the emergency brakes. Describe what the service line is for. They are filled by the emergency supply line from the tractor.

When coupling a tractor-semitrailer to test the trailer air brakes you should place the tractor protection valve control in what position. It is used to supply the trailer with air shut the air off and put on the trailer emergency brakes. The emergency line also called the supply line has 2 purposes.

Newer vehicles automatically detect if the lines are crossed and will auto-correct itself. The valve will pop out thus closing the tractor protection valve when the air pressure drops into the range. Describe what the trailer air supply control does.

Supply air will be sent to the service line instead of going to charge the trailer air tanks which means the trailer spring brakes will not release. These are just a few of the examples of the types of questions and concepts that comprise this practice exam. It is very important to keep the air supply clean.

First it supplies air to the trailer air tanks. They provide the air pressure used to operate trailer brakes. 626 Trailer Air Tanks.

It is used to supply the trailer with air shut the air off and put on the trailer emergency brakes. Why should you never back under a trailer at an angle. Describe what the trailer air supply control does.

Second the emergency line controls the. When coupling a tractor-semitrailer to test the trailer air brakes you should place the tractor protection valve control in what position. Carries air controlled by the foot brake or the trailer hand brake.

The trailer air supply control on newer vehicles is a red 8-sided knob used to control the tractor protection valve. What is the trailer air supply control on newer vehicles. Describe what the trailer air supply control does.

Describe what the trailer air supply control does. Supply air to the trailer air tanks and control the emergency brakes on combination vehicles. You push it in to supply the trailer with air and pull it out to shut the air off and put on the trailer emergency brakes.

Describe what the trailer air supply control does. Describe what the trailer air supply control does. A red eight sided knob which you use to control the tractor protection valve.

The valve will pop out closing the tractor protection valve when the air pressure drops into the range of 20-45 psi. It is a yellow six sided knob used to control the tractor protection valve. Describe what the trailer air supply control does.

Describe what the trailer air supply control does. It is a device used to keep the trailer behind the tractor.

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