Question 1
In normal driving, some drivers use the hand valve before applying the brake pedal to prevent a jackknife. Which of these statements is true?
Correct Answer:
It should not be done
Question 2
You should not back a tractor under a trailer until the whole air system is:
Correct Answer:
At normal pressure
Question 3
After you supply air to the trailer, make sure the airlines are not crossed and the trailer brakes are working. This can be done by:
Correct Answer:
Applying and releasing the trailer brakes and listening for brake sounds
Question 4
What is the safest way for you to make a turn without entering another traffic lane?
Correct Answer:
You should turn wide as you complete the turn.
Question 5
Even before antilock braking systems (ABS) were required, some vehicles already had them. How can you check if your vehicle has ABS?
Correct Answer:
Look under the vehicle for the ECU and wheel speed sensor wires coming from the back of the brakes.
Question 1 of 20
Exam overview

About this Exam

A California CDL Combination vehicle endorsement is a critical requirement for any commercial driver who intends to operate articulated vehicles, specifically those that pull one or more trailers. This particular practice test, "California CDL Combination Practice Test 4," is specifically designed as a comprehensive study tool for applicants aiming to qualify for a Class A combination license. It serves as an essential bridge for drivers looking to expand their career opportunities beyond standard straight truck operations, moving into the essential and high-demand world of logistics and freight transport.

More details

Additional Information

What the Course Entails and Exam Details

The core topics covered within the study material and examined in the final California CDL Combination vehicle test center on the unique safety considerations and operational techniques required for articulated vehicles. Candidates must demonstrate proficiency in several key areas. These include: identifying the characteristics of various combination vehicle types, understanding their unique handling dynamics, mastering safe braking procedures including the complex air brake systems specific to combination vehicles, and proving comprehensive knowledge of essential coupling and uncoupling techniques for trailers and tractor-trailers.


What to Expect in the Final Exam

The final California CDL Combination vehicles endorsement knowledge test is a multiple-choice exam, drawing directly from the information provided in the official California Commercial Driver Handbook (specifically Section 6). Applicants typically face approximately 20 to 30 questions covering the topics mentioned above. To successfully obtain the endorsement, a passing score of at least 80% is mandatory. While there is generally no strict time limit for the knowledge test, applicants must take it in person at a California Department of Motor Vehicles (DMV) field office.


How to Study and Exam Centers

An effective study strategy is crucial for success. We highly recommend first thoroughly reading and understanding the material provided in Section 6 (Combination Vehicles) of the official California CDL Handbook. Once you have a foundational grasp of the concepts, actively use comprehensive practice tests like this "California CDL Combination Practice Test 4" to identify gaps in your knowledge and reinforce your understanding. Repeated practice until you consistently achieve 100% on simulations is the best path to confidence. When you feel ready, you can schedule your knowledge test appointment online through the California DMV website for an in-person exam at any official field office located conveniently across the state, such as in major hubs like Los Angeles, Sacramento, or San Diego.


Job Opportunities from the Course

Successfully obtaining your Combination Vehicle endorsement significantly broadens your potential career path within the logistics and transportation sector, opening doors to many specialized and potentially lucrative driving roles. Specific job titles that require or heavily benefit from this credential include:

  • Long-Haul Truck Driver (Class A OTR)

  • Regional/Local Delivery Driver (Tractor-Trailer)

  • Flatbed Truck Driver

  • Doubles/Triples Operator (following additional endorsement)

  • Tanker Vehicle Operator (following additional endorsement)

Quiz information

Frequently Asked Questions

There are currently 20 available practice questions in this quiz.
No fixed duration is currently configured for this quiz.
Question explanations are included where they are available in the quiz content, helping you review the reasoning after answering.
Yes. You can retake the practice test again as you continue studying during your available access period.
After your access is confirmed, you can continue into the complete practice exam from this quiz flow.
Unless explicitly stated otherwise, this page provides independent practice material for study and exam preparation and is not the official examination itself.
Keep studying

Related Questions