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Practice test 5 of 10

Wyoming CDL — Air Brakes Practice Test 5

The Wyoming 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.Section 11M explains why the air lines running to a trailer are inspected. What does it say a low air condition in those lines will cause?
  2. 2.As a dual-system truck airs up, its low air light and buzzer go quiet when the gauges pass 50 psi. How does that compare with Wyoming's manual?
  3. 3.Which statement about front brake limiting valves does NOT match the manual?
  4. 4.If a driver ignores a low air warning, falling pressure will eventually bring the spring brakes on by themselves. Which pairing of vehicle and risk matches the manual?
  5. 5.Your tank pressure dipped to the governor's cut-in level a moment ago and is now climbing through 115 psi. Going by the manual's approximate figures, what is the air compressor doing?
  6. 6.Your dual-system truck fails the Step 7 air pressure buildup check, even measured against the manufacturer's specifications. What does the manual tell you to do?
  7. 7.Which test in the Step 7 final air brake check is done with the vehicle rolling forward?
  8. 8.The engine-start portion of Section 11M's vehicle inspection has you check the ABS indicator on the dashboard. What extra ABS check does it add for combination vehicles only?
  9. 9.Two entries on Wyoming's list of restriction codes concern air brakes. How does the list word code L?
  10. 10.The stopping distance chart in Wyoming's Section 5 gives a total of 375 feet at 50 mph. Which two figures on that row add up to it?

0 of 25 answered