# Free California CDL General Knowledge Practice Test 2023

You are looking for actual practice for your coming CDL test? So you have come to the right place. Our CA General Knowledge Practice Test has the same questions as the real exam which is based on the California CDL Handbook. Our test covers most of the subject areas on the California General Knowledge Test such as shifting techniques, railroad crossing safety, drunk driving laws, and much more to make you become a safer driver. In addition, each question has a detailed explanation that will help you understand the concept and answer future questions about it correctly. If you don't get the pass right away, don't worry, you can take this California CDL practice test an unlimited number of times to make sure you learn all the questions. Our practice test will refine your driving knowledge so you can earn your CDL and start driving on the roads. Let’s take our CDL practice test now!

Our CDL practice tests:
Based on 2021 CA commercial driver's license manual
Perfect for first-time, renewal applicants
CA CDL General Knowledge Test format:
50 questions
80% passing score
List of questions
1.
What are the Federal standards for the gross vehicle weight of a 5 axle commercial vehicle?
2.
One can recognize hazardous materials by looking on the container:
3.
How do you stop a front-wheel skid?
4.
When is the driver responsible for inspecting cargo and securing devices?
5.
When is it necessary to learn how a fire extinguisher works?
6.
You are driving on a clear night. You must dim your headlights from high to low. You should adjust your speed so that you can stop within:
7.
All of the following are requirements for dividing vehicles over 33ft, EXCEPT:
8.
What should you do before driving in mountains?
9.
Placing a phone call while driving:
10.
Whenever you double your speed, your vehicle has about how many times of destructive power if it crashes?
11.
On an accident scene, if a qualified helper is present you should:
12.
ABS malfunction lights will be what color?
13.
The maximum weight limit on a single axle is:
14.
When should drivers inspect their vehicles?
15.
By definition, what is a wedge?
16.
Which of these is not required knowledge for drivers seeking a hazardous material endorsement?
17.
Is the below example a completed 34 hour restart?
Day 1

Day 2

18.
How many on duty hours are remaining after the following has been logged (use a scratch sheet of paper if you need to):

- On duty/not driving: 3 hours

- Driving: 4 hours

- Sleeper berth: 8 hours

- Driving: 7 hours

- Off duty: 2 hours
19.
Which of the statements about pre-trip inspection is true?
20.
What is the main factor affecting the low-speed offtracking of a tractor trailer?
21.
You are starting your vehicle in motion from a stop. As you apply power to the drive wheels, they start to spin. You should:
22.
Rims with welding repairs or missing lugs:
23.
Which of these is true about the use of drugs while driving?
24.
Which of the following is not an acceptable method of containing loose parts when securing flattened or crushed vehicles?
25.
Drivers are generally only allowed to use cell phones or text in all of the following situations, EXCEPT:
26.
Most skids:
27.
Why did Congress enact the Bridge Formula in 1975?
28.
The condition in which water or slush collects on the road and your tires lose contact and have little or no traction is called:
29.
The tread depth on front steering wheel tires should be:
30.
What is the minimum allowable tread depth for every groove on the front tires?
31.
Which of the following is not a reason why loads should be secured?
32.
Which of these statements about brakes is true?
33.
The maximum number of pull-ups allowed during the driving exam before failure is:
34.
Option #3 for a single metal coil with eyes lengthwise requires:
35.
A 30 minute break violation occurs on the below example. What day and time does the violation occur?
Day 1

Day 2
36.
In order to perform the in-cab and gauge inspection, which of the following must be done?
37.
A tractor trailer traveling 55 mph will travel how far between when the brain perceives a hazard and stopping?
38.
What is the primary goal of implementing the Bridge Formula?
39.
Which of the following has the greatest affect on the gross vehicle weight?
40.
What day and time did a violation occur in the below example?
Day 1

Day 2
41.
When securing metal coils in a sided vehicle without anchor points:
42.
Can state inspectors inspect your truck or bus?
43.
Methods of securing building materials against forward motion include:
44.
How many reflective triangles are required to be kept as part of a trucks emergency equipment?
45.
A bulkhead is used ______.