This is the first of two different Doubles & Triples CDL practice tests that we offer. Please take all of our free practice tests to ensure that you score well on the big day! Driving Doubles & Triples is complicated and requires an extensive knowledge of your truck and the additional units!
Our free Doubles & Triples CDL practice test contains 10 questions. You may not skip any of the questions. There is no time limit on the test. For maximum practice, we highly recommend taking each of our free CDL practice tests at least once.
Our CDL practice test database contains hundreds of questions. If you need more practice or want to improve your score, click the ‘Restart Quiz’ button at the end of the test. The questions will be presented 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 1
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Question 1 of 10
If your trailer starts to skid you should __________.CorrectIncorrect
Question 2 of 10
The rear wheels following a different path than the front wheels when going around a corner is often called __________.CorrectIncorrect
Question 3 of 10
Doubles and triples take up more space than other commercial vehicles because __________.CorrectIncorrect
Question 4 of 10
To allow more space when entering or crossing traffic you should __________.CorrectIncorrect
Question 5 of 10
There is more chance of skids when driving doubles or triples in slippery conditions because __________.CorrectIncorrect
Question 6 of 10
You should use the trailer hand valve for parking a combination vehicle __________.CorrectIncorrect
Question 7 of 10
In normal driving you should use the trailer hand value instead of the brake pedal to prevent trailer skids __________.CorrectIncorrect
Question 8 of 10
Which valve keeps air in the tractor if the trailer breaks away or develops a leak?CorrectIncorrect
Question 9 of 10
Which brakes should come on if the tractor protection value closes?CorrectIncorrect
Question 10 of 10
How do you use the trailer air supply control knob?CorrectIncorrect