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.

Pre Trip Test 01

1 / 30

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

2 / 30

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

3 / 30

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

4 / 30

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

5 / 30

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

6 / 30

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

7 / 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?

8 / 30

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

9 / 30

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

10 / 30

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

11 / 30

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

12 / 30

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

13 / 30

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

14 / 30

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

15 / 30

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

16 / 30

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

17 / 30

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

18 / 30

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

19 / 30

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

20 / 30

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

21 / 30

Power steering fluid levels must be...?

22 / 30

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

23 / 30

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

24 / 30

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

25 / 30

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

26 / 30

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

27 / 30

You should look on the underside of the engine and transmission for...?

28 / 30

Side reflectors on your vehicle must be of what color?

29 / 30

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

30 / 30

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

Your score is


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.