The CDL pre trip practice test will examine your knowledge of internal inspection and external inspection. In order to receive your Commercial driver’s license, it is required that you pass the state’s official CDL written Knowledge exam.
You should look on the underside of the engine and transmission for...?

Question 1 of 30

How many properly charged and rated fire extinguishers must you have on board your vehicle?

Question 2 of 30

You must have working indicators on the dashboard for which of these lights?

Question 3 of 30

When making a safe start, you should place the gearshift lever in...?

Question 4 of 30

When checking your brake, turn signal and four way flasher operation, you should do so...?

Question 5 of 30

Clearance lights on the rear of your vehicle must be what color?

Question 6 of 30

When checking the oil, the level must be...?

Question 7 of 30

If your vehicle is not equipped with an inspection reservoir sight glass, you should remove the radiator cap to inspect visually, making sure...?

Question 8 of 30

The belts in the engine compartment should have no more than...?

Question 9 of 30

Which of these should result in a vehicle failing a pretrip inspection?

Question 10 of 30

Which of these will show you that the oil pressure gauge is working satisfactorily?

Question 11 of 30

For the pretrip inspection, you must bring...?

Question 12 of 30

During the pretrip inspection portion of the skills test, you will not have to...?

Question 13 of 30

If your vehicle has power steering, a 20 inch steering wheel should not turn more than how far before the front left wheel barely moves?

Question 14 of 30

To test the air gauge, you should build air pressure to the governor cutout, which is usually...?

Question 15 of 30

During the pretrip inspection test, you should...?

Question 16 of 30

Which of these is not acceptable as an emergency warning device?

Question 17 of 30

You should check your parking brake function by...?

Question 18 of 30

Which of these should be a compulsory part of your emergency equipment?

Question 19 of 30

The first way to check for leaks from hoses is to...?

Question 20 of 30

The most important thing to demonstrate on the pretrip inspection portion of the skills test is that...?

Question 21 of 30

The first maneuver in a safe start is to...?

Question 22 of 30

Power steering fluid levels must be...?

Question 23 of 30

If you have an oil temperature gauge, when you start the engine it should...?

Question 24 of 30

Which gauge shows you that the alternator and/or generator is charging?

Question 25 of 30

Side reflectors on your vehicle must be of what color?

Question 26 of 30

Your windshield wiper arms and blades must be...?

Question 27 of 30

If your warning devices consist of fusees, you must have at least how many?

Question 28 of 30

The play on a steering wheel without power steering should not exceed...?

Question 29 of 30

After starting the engine for safe start, you should...?

Question 30 of 30



Studying and applying oneself is the only way to successfully learn the information you need to know to pass all testing required to obtain your CDL. We are here to help.

Don’t hesitate to take advantage of our practice tests in each category specific to your needs. We wish you the best of luck in your endeavors and are pleased to be of assistance.


Log in with your credentials

Forgot your details?