A practice test for the MTO's "Z" endorsement for trailer air brake systems. For those upgrading to a truck and trailer equipped with air brakes. There are 10 randomized questions in the practice test. Questions are designed as a learning tool. Rather than testing what you don't know, these practice questions identify gaps in your knowledge.. SK Air Brakes practice test 3. 25 terms. tfxo20. SK Air Brakes practice test 4. 25 terms. tfxo20. 1 / 4. Study with Quizlet and memorize flashcards containing terms like what does an anti-compound line do?, if one circuit on a dual circuit system fails, the other circuit will do what?, air dryer systems are useful in preventing what? and more.

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![Ace Your Air Brakes CDL Test with These Expert Tips and Free Practice Questions [2024] Ace Your Air Brakes CDL Test with These Expert Tips and Free Practice Questions [2024]](http://driving-tests.org/wp-content/uploads/2023/02/air-brakes-test.jpg)
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Air Brakes Practice - Test 2 This test contains 25 questions.) 250-655-0432. [email protected]. Login. Popular Courses. Class 1 Tractor Trailer. Class 2 (Buses) Air Brake Training; Class 3 (Straight Truck with Tandem Rear Axles) Class 4 (Small Bus, Taxi, Limousine) Popular Articles.. 3 psi in one minute. Air loss in a single vehicle (not a combination unit) should not be more than______with the engine off and the brakes on. 60 psi. The vehicle must have a warning device which comes on when the air pressure in the service air tanks fall below: One way check valve.