CDL Practice Test ( Updated 2024 ) Complete Questions & Answers (Solved) 100% Correct

CDL Practice Test ( Updated 2024 ) Complete Questions & Answers (Solved) 100% Correct 1. When uncoupling, it's a good practice to... Answer: coupling the glad hands togetherand/or using the dummy couplings 2. If you cross your air lines on a new trailer with spring brakes... Answer: you won't beable to release the trailer brakes 3. When traveling under 40 mph, you should follow other vehicles... Answer: With adistance of one second for every ten feet of your vehicle length 4. In order to supply air to the trailer, you must first... Answer: Push in the tractorprotection valve 5. If one of the glad hands on your blue air line is missing a seal... Answer: you mightend up with a service line air leak 6. . When you inspect the coupling, check to ensure that.. Answer: there's a little slackin the air lines 7. The trailer hand valve should be used... Answer: Only to test the trailer brakes 8. Which one of the following statements about tractor protection valves isNOT true? Answer: When it closes it allows air to leak from the tractor line 9. You can damage the landing gear if you... Answer: back under the trailer at an angle 10. . Which one of the following is controlled by the foot brake? Answer: The serviceair line 11. When coupling the trailer, back up slowly until... Answer: The fifth wheel just touchesthe trailer 12. The earliest way to notice a trailer skid is... Answer: By seeing it in your mirrors 13. A king pin is... Answer: pin which locks the trailer to the tractor on the fifth wheel