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Tractor Protection Valve System Quiz

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Questions and Answers

What should you do to ensure the low air warning light and buzzer go off?

Check the engine temperature

Pump the brakes down between 20-45 psi (correct)

Disconnect the blue service airline glad hand

Increase the air pressure above 100 psi

When should you build up air pressure again after checking your trailer brakes?

When the governor cuts in

Between 10-20 psi

Between 90-100 psi (correct)

At 50 psi

What should you do if your slacks/pushrod are not at a 90-degree angle?

Get it repaired/serviced immediately (correct)

Apply your service brakes and listen for gushing air

Ignore it as it is not important

Continue driving normally

What should you do if you hear air escaping after applying your service brakes?

Get the tractor protection valve repaired/serviced immediately Signup and view all the answers

When should you disconnect the blue service airline glad hand?

Before turning off the truck engine Signup and view all the answers

What is the purpose of the tractor protection valve/system?

To prevent air loss from the truck's brake system if the trailer breaks away Signup and view all the answers

What are the two components of the tractor protection valve/system?

The tractor protection valve and the red trailer air supply control valve Signup and view all the answers

What causes the tractor protection valve to close automatically?

When the air pressure in the system is low (20-45 psi) Signup and view all the answers

What happens when the tractor protection valve closes?

It stops air from going out of the tractor and lets air out of the trailer's emergency line Signup and view all the answers

What is the consequence of a bad tractor protection valve?

It can lead to an Out of Service violation Signup and view all the answers