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Practice test 5 of 10

Pennsylvania CDL — Air Brakes Practice Test 5

The Pennsylvania CDL — Air Brakes knowledge test has ~25 questions; you need ~20 correct (80%) to pass.

This practice test follows that format: 25 questions, pass with 20 correct. Answer every page, then grade it to see the answers and explanations.

Questions 1–10 of 25

  1. 1.On a vehicle with an application pressure gauge, needing more and more pressure to hold the same speed is a sign of what?
  2. 2.Which sequence correctly describes stab braking?
  3. 3.On large buses, at roughly what pressure do the low-pressure warning devices commonly activate?
  4. 4.Truck tractors with air brakes are required to have ABS if built on or after what date?
  5. 5.How is the air compressor typically driven?
  6. 6.The most common kind of foundation brake on heavy vehicles is which type?
  7. 7.On some buses, what is the separate air tank tied to the parking-brake system used for?
  8. 8.How does an air brake system light up the brake lights for the drivers behind you?
  9. 9.On dry pavement at 55 mph, about how much distance does air brake lag add?
  10. 10.When the low-air warning first comes on, what should you do?

0 of 25 answered