This is the second of our two Doubles & Triples CDL practice tests. Please take all of the practice tests to increase your chance of doing well on the actual test!
Our free Doubles & Triples CDL practice test contains 10 questions. There is no time limit on the test. You must answer every question.
You’re welcome to retake this test as many times as you’d like. If you want to improve your score or just need more practice, click the ‘Restart Quiz’ button at the end of the test. The questions will be displayed in a different order but they’ll be the same questions you already answered. The second time around you should know the answers!
Feel free to retake this test as many times as you’d like. Once you receive your score there will be a button to View Questions. Wrong answers will be highlighted in red. The correct answer will be in a green box outlined in green.
Being the driver of a commercial vehicle is a huge responsibility. The written CDL test isn’t that bad. The actual driving test is rigorous. Inspectors do not want anyone on the road who isn’t capable of handling a big rig. Make sure you practice your driving and especially BACKING UP.
Congratulations on your decision to become a commercial driver!
Doubles & Triples CDL Practice Test 2
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Older vehicles may have a lever rather than a knob for the tractor protection valve. What the normal and emergency positions of the lever?CorrectIncorrect
The valves on the service line on the trailer used to connect the trailer air tanks to the trailer air brakes are called __________.CorrectIncorrect
One purpose of the emergency air line is to __________.CorrectIncorrect
If there is a loss of pressure in the emergency line the trailer emergency brakes __________.CorrectIncorrect
What happens to the tractor protection valve if the emergency line loses pressure?CorrectIncorrect
Which lines are normally blue?CorrectIncorrect
The tow seals are pressed together with the couplers at what kind of angle to connect the glad hands?CorrectIncorrect
When you are not towing a trailer you should lock the glad hands to each other __________.CorrectIncorrect
What should you do if the spring brakes don’t release when you push the trailer air supply control?CorrectIncorrect
Which of the following statements is true?CorrectIncorrect