A CDL holder is convicted of a moving traffic violation while driving a personal car. What must the driver do?49 CFR 383.31
A driver certifies to the state as non-excepted interstate. What does that category mean?49 CFR 383.71(b)(1)(i)
A driver passed the knowledge and skills tests in a Group A combination. Which other groups may that driver operate with the right endorsements?49 CFR 383.91(c)(1)
A driver receives notice that their license has been suspended. By when must the employer be told?49 CFR 383.33
A driver wants the tractor-trailer restriction removed from a CDL. What does that take?49 CFR 383.135(b)(8)
A permit holder has a passenger (P) endorsement on the CLP. Who may ride in the bus during training?49 CFR 383.25(a)(5)(i)
A permit holder has a tank vehicle (N) endorsement on the CLP. Which tank vehicle may that person drive?49 CFR 383.25(a)(5)(iii)
A person who holds a CDL is considered to have agreed to what, simply by driving a commercial motor vehicle?49 CFR 383.72
A small bus is rated under 26,001 pounds. At what designed seating capacity does it become a Group C commercial vehicle?49 CFR 383.91(a)(3)
Show all 222 questions (213 more)
CDL and permit rules, continued
A state offers the CDL knowledge test in a language other than English. What does the federal rule say?49 CFR 383.133(b)(3)
A straight truck has a GVWR of 33,000 pounds and tows a trailer with a GVWR of 8,000 pounds. Which vehicle group is it?49 CFR 383.91(a)(2)
An applicant fails the basic vehicle control segment of the skills test. What happens next?49 CFR 383.133(c)(6)
An applicant retakes a knowledge test after failing it. What must the state do?49 CFR 383.133(b)(4)
An applicant scores under 80 percent on the combination vehicle part of the knowledge test. What is the result?49 CFR 383.135(a)(3)
An applicant takes the CDL skills test in a truck with an automatic transmission. What goes on the license?49 CFR 383.95(c)
An applicant tests for Group A with a trailer connected by a pintle hook. Which restriction follows?49 CFR 383.95(d)
An employer knows a driver holds CDLs from two states. May the employer let that driver operate a CMV?49 CFR 383.37(c)
Does 49 CFR Part 383 apply to a driver who never leaves one state?49 CFR 383.3(a)
During a CDL skills test the applicant runs a stop sign. What is the result?49 CFR 383.135(b)(2)
How long can a CLP stay valid before the holder must retake the knowledge tests?49 CFR 383.25(c)
How many driver's licenses may a person who drives a commercial motor vehicle hold at one time?49 CFR 383.21
How many possible responses does each knowledge test question have, according to section 383.133?49 CFR 383.133(b)(2)(iii)
How many years of commercial driving employment history must a job applicant give a prospective employer?49 CFR 383.35(c)
How often must a hazardous materials endorsement be renewed?49 CFR 383.141(d)
How soon after a CLP is first issued may the holder take the CDL skills test?49 CFR 383.25(e)
In a truck, where must the accompanying CDL holder sit while a permit holder drives?49 CFR 383.25(a)(1)
In what order are the three parts of the CDL skills test given?49 CFR 383.133(c)(6)
May a commercial learner's permit holder drive a vehicle carrying hazardous materials that require placards?49 CFR 383.25(a)(6)
May an applicant use an interpreter during the CDL skills test?49 CFR 383.133(c)(5)
Since February 7, 2022, what must a first-time Class A applicant finish before taking the skills test?49 CFR 383.71(a)(10)
Under the federal definition, which vehicle is a tank vehicle?49 CFR 383.5
What does gross vehicle weight rating (GVWR) mean?49 CFR 383.5
What does restriction code K on a CDL mean?49 CFR 383.153(a)(10)(vii)
What does restriction code L on a CDL mean?49 CFR 383.153(a)(10)
What does the endorsement code X on a CDL mean?49 CFR 383.153(a)(9)(v)
What happens if an applicant fails the air brake part of the knowledge test but is still issued a CLP or CDL?49 CFR 383.135(a)(2)
What is the minimum age to hold a commercial learner's permit under the federal rules?49 CFR 383.25(a)(4)
What score is needed to pass each CDL knowledge test under the federal standard?49 CFR 383.135(a)(1)
Which agency's security threat determination stands behind a hazardous materials endorsement?49 CFR 383.141(b)
Which conviction does a CDL holder not have to report to an employer under section 383.31?49 CFR 383.31(a)
Which endorsement code on a CDL stands for tank vehicles?49 CFR 383.153(a)(9)
Which endorsements can be placed on a commercial learner's permit?49 CFR 383.25(a)(5)
Which of these counts as a conviction under the CDL rules?49 CFR 383.5
Which two endorsements require a skills test as well as a knowledge test?49 CFR 383.93(c)
Which vehicle needs a Group A (Class A) CDL?49 CFR 383.91(a)(1)
Who must ride with a commercial learner's permit (CLP) holder during behind-the-wheel training on public roads?49 CFR 383.25(a)(1)
Disqualifications 23
A CDL holder commits a serious traffic violation in a personal car. When does it count toward a CMV disqualification?49 CFR 383.51(c), Table 2
A CDL holder is convicted for the first time of driving a CMV under the influence of alcohol. How long is the disqualification?49 CFR 383.51(b), Table 1
A CDL holder is convicted of driving under the influence in a personal car. What happens to the commercial privilege?49 CFR 383.51(b), Table 1
A driver causes a death through negligent operation of a CMV. How is that treated?49 CFR 383.51(b), Table 1
A driver has a third railroad crossing conviction within 3 years. What is the minimum disqualification?49 CFR 383.51(d), Table 3
A driver hauling general freight violates an out-of-service order for the first time. What is the disqualification range?49 CFR 383.51(e), Table 4
A driver is cited for not having the CDL in possession. How can the driver avoid a conviction for that serious violation?49 CFR 383.51(c), Table 2
A driver is convicted of two serious traffic violations in separate incidents within 3 years, both in a CMV. How long is the disqualification?49 CFR 383.51(c), Table 2
A driver refuses an alcohol test required under a state's implied consent law. How do the CDL rules treat the refusal?49 CFR 383.51(b), Table 1
A driver uses a vehicle to commit a felony involving the manufacture or distribution of controlled substances. What is the penalty?49 CFR 383.51(b), Table 1
A driver violates an out-of-service order for the first time while driving a bus designed for 16 or more people. What is the range?49 CFR 383.51(e), Table 4
A driver's first major offense, such as driving under the influence, happens while hauling placarded hazardous materials. How long is the disqualification?49 CFR 383.51(b), Table 1
After how many years may a state reinstate some drivers who were disqualified for life, once they finish a rehabilitation program the state accepts?49 CFR 383.51(a)(6)
At what alcohol concentration is a person driving a CMV committing a major disqualifying offense?49 CFR 383.51(b), Table 1
How far over the posted limit does speeding become a serious traffic violation for a CDL holder?49 CFR 383.51(c), Table 2
How long is the disqualification for a third serious traffic violation in a CMV within 3 years?49 CFR 383.51(c), Table 2
One disqualifying railroad crossing offense concerns the vehicle's height off the ground. What is it?49 CFR 383.51(d), Table 3
What is the disqualification for a second conviction of a major offense, such as driving under the influence or leaving the scene of an accident?49 CFR 383.51(b), Table 1
What is the minimum disqualification for a first conviction of a railroad-highway grade crossing violation in a CMV?49 CFR 383.51(d), Table 3
Which of these is a railroad crossing offense that can disqualify a CDL holder?49 CFR 383.51(d), Table 3
Which of these is a serious traffic violation under section 383.51?49 CFR 383.51(c), Table 2
Which of these is listed as a serious traffic violation when it happens in a CMV?49 CFR 383.51(c), Table 2
Which offense brings a lifetime disqualification with no reinstatement, even on a first conviction?49 CFR 383.51(b), Table 1
Alcohol and drugs 18
A CMV accident causes a death. Which surviving drivers must the employer test?49 CFR 382.303
A driver is found to have violated the alcohol prohibition in section 392.5. What happens at once?49 CFR 392.5(c)
A driver is issued an out-of-service order under the alcohol rule. How soon must the employer be told?49 CFR 392.5(d)
A driver refuses a required random drug test. What follows under section 382.211?49 CFR 382.211
A driver tests at an alcohol concentration of 0.03. What happens under section 382.505?49 CFR 382.505(a)
A reasonable suspicion alcohol test has not been given 8 hours after the determination. What must the employer do?49 CFR 382.307(e)(1)
After an accident that calls for a post-accident alcohol test, how long must the driver avoid alcohol?49 CFR 382.209
An accident causes disabling damage and a tow, with no death. When is a post-accident alcohol test required?49 CFR 382.303(a)(2)
May a driver use a Schedule I drug and still perform safety-sensitive functions?49 CFR 382.213(a)
May an employer require drivers to report the prescription drugs they take?49 CFR 382.213(d)
Section 382.201 bars a driver from reporting for safety-sensitive work at or above what alcohol concentration?49 CFR 382.201
Section 392.4 bans being on duty under the influence of which of these, unless a medical practitioner has given the required advice?49 CFR 392.4
The supervisor who decides there is reasonable suspicion of alcohol use may not do what?49 CFR 382.307(c)
What is the minimum time a driver must wait after using alcohol before performing safety-sensitive functions?49 CFR 382.207
When may a driver use a prescribed controlled substance that is not on Schedule I?49 CFR 382.213(b)
Which of these is allowed under the alcohol rule in section 392.5?49 CFR 392.5(a)(3)
Who may make the observations that support a reasonable suspicion test?49 CFR 382.307(c)
Within how many hours of a qualifying accident must a citation come for a post-accident drug test to be required?49 CFR 382.303(b)(2)
Driver fitness and qualifications 13
A driver becomes too ill to drive safely while on the road. What does section 392.3 allow?49 CFR 392.3
A driver qualified through a medical variance, such as a skill performance evaluation certificate. What must be carried on duty?49 CFR 391.41(a)(1)(ii)
How often must a driver with insulin-treated diabetes be medically examined and certified?49 CFR 391.45(e)
How often must most drivers be medically examined and certified?49 CFR 391.45(b)
How old must a driver be to operate a CMV in interstate commerce under Part 391?49 CFR 391.11(b)(1)
Since June 23, 2025, must a CDL holder with a current medical examiner's certificate carry the paper certificate while on duty?49 CFR 391.41(a)(2)(i)(B)
What distant vision must a driver have in each eye, with or without corrective lenses?49 CFR 391.41(b)(10)
What field of vision does the physical standard require in each eye?49 CFR 391.41(b)(10)
What is the forced whisper hearing standard for drivers?49 CFR 391.41(b)(11)
What must a driver be able to judge about cargo under section 391.13?49 CFR 391.13
Which colors must a driver be able to recognize on traffic signals and devices?49 CFR 391.41(b)(10)
Which language ability does Part 391 require of a driver?49 CFR 391.11(b)(2)
Which of these disqualifies a person under the physical standards of section 391.41?49 CFR 391.41(b)(13)
Vehicle inspection 31
A driver finishes the day and finds no defects on the truck. Is a written report required by section 396.11?49 CFR 396.11(a)(2)(i)
A driver receives a roadside inspection report. What must the driver do with it?49 CFR 396.9(d)(1)
A report lists a defect likely to affect safety. What must the carrier do before the vehicle is driven again?49 CFR 396.11(a)(3)
A vehicle becomes unsafe while on the highway. How far may it be driven?49 CFR 396.7(b)
An inspector marks a truck with an out-of-service sticker. When may it be driven again?49 CFR 396.9(c)(2)
As a general rule, how many outside rear-vision mirrors must a truck tractor have?49 CFR 393.80(a)
Before driving, what must the driver be satisfied of under section 396.13?49 CFR 396.13(a)
How long does a carrier have to certify that violations on a roadside inspection report were corrected?49 CFR 396.9(d)(3)
How long must a carrier keep a driver vehicle inspection report?49 CFR 396.11(a)(4)
How often must a bus's pushout windows and emergency doors be inspected?49 CFR 396.3(a)(2)
How recently must every commercial motor vehicle have passed a periodic inspection?49 CFR 396.17(c)
In a combination of tractor, semitrailer and full trailer, which units must pass a periodic inspection?49 CFR 396.17(a)
The last driver vehicle inspection report listed a defect. What must the next driver do before driving?49 CFR 396.13
May an exhaust system be temporarily repaired with wrap or patches?49 CFR 393.83(f)
On a two-driver operation, who signs the driver vehicle inspection report?49 CFR 396.11(a)(2)(ii)
What does section 393.75 say about tire inflation?49 CFR 393.75(i)
What is the minimum tread depth for a front tire on a truck or truck tractor?49 CFR 393.75(b)
What is the minimum tread depth for tires that are not on the front wheels?49 CFR 393.75(c)
When does a driver prepare the written driver vehicle inspection report?49 CFR 396.11(a)(1)
When must the lamps required on a commercial vehicle be capable of working?49 CFR 393.9(a)
Where on the tire is tread depth measured?49 CFR 393.75(b)-(c)
Which exhaust system condition violates section 393.83?49 CFR 393.83(g)
Which of these is on the list of parts a driver must find in good working order before driving, under section 392.7?49 CFR 392.7
Which power steering condition violates section 393.209?49 CFR 393.209(e)
Which repair is not allowed on the universal joints of the steering system?49 CFR 393.209(d)
Which suspension condition violates section 393.207?49 CFR 393.207(c)
Which tire condition puts a vehicle in violation of section 393.75?49 CFR 393.75(a)
Which tires are banned from the front wheels of a bus?49 CFR 393.75(d)
Which wheel condition violates section 393.205?49 CFR 393.205
Which windshield damage is allowed in the driver's viewing area?49 CFR 393.60(c)
Who may remove an out-of-service sticker from a vehicle, and when?49 CFR 396.9(c)(3)
Cargo securement 20
A load sticks out more than 4 feet beyond the rear of the vehicle. How must its end be marked?49 CFR 393.87(a)
A projecting load is 3 feet wide. How many warning flags go on it?49 CFR 393.87(b)
After the first check, when must cargo be re-examined on the road?49 CFR 392.9(b)(3)
An article is 4 feet long and weighs 900 pounds, with nothing blocking it in front. What is the minimum number of tiedowns?49 CFR 393.110(b)(1)
An article is 4 feet long and weighs 2,000 pounds, with nothing blocking it in front. What is the minimum number of tiedowns?49 CFR 393.110(b)(2)
An article is 22 feet long and is not blocked against forward movement. What is the minimum number of tiedowns?49 CFR 393.110(b)(3)
An article is 25 feet long and is blocked in front by a headerboard. What is the minimum number of tiedowns?49 CFR 393.110(c)
Besides the driver's view, what must cargo leave clear under section 392.9(a)?49 CFR 392.9(a)(3)
How far may a load extend beyond the sides of the vehicle before warning flags are required?49 CFR 393.87(a)
How must articles of cargo that are likely to roll be restrained?49 CFR 393.106(c)(1)
What forward deceleration must tiedowns withstand without exceeding their breaking strength?49 CFR 393.102(a)(1)
What is the minimum aggregate working load limit of the tiedowns that secure an article?49 CFR 393.106(d)
What must a cargo securement system prevent under section 393.100?49 CFR 393.100
What must the driver be able to do with each tiedown, other than steel strapping?49 CFR 393.112
When a front-end structure is used to stop cargo moving forward, how high must it reach?49 CFR 393.114(b)(1)
When is edge protection required on a tiedown?49 CFR 393.104(f)(4)
Which driver is exempt from the cargo inspection rules of section 392.9(b)?49 CFR 392.9(b)(4)
Which loading condition makes it illegal to drive under section 392.9(a)?49 CFR 392.9(a)(3)
Which tiedown may not be used under section 393.104?49 CFR 393.104(f)(1)
Within how many miles of starting a trip must a truck driver inspect the cargo and its securing devices?49 CFR 392.9(b)(2)
Hours of service 27
A carrier does not run trucks every day of the week. What is the on-duty limit for its drivers?49 CFR 395.3(b)(1)
A carrier operates commercial vehicles every day of the week. Which on-duty limit may its drivers use?49 CFR 395.3(b)(2)
A driver is handed a form ordering them out of service for an hours violation. What must the driver do with the copy?49 CFR 395.13(d)(3)
A driver meets unexpected fog and cannot finish the run in time. How much longer may the driver drive?49 CFR 395.1(b)(1)
A driver's records are complete except for today and yesterday. What happens at a roadside inspection?49 CFR 395.13(b)(3)
After an ELD malfunction, which records must the driver reconstruct on paper?49 CFR 395.34(a)(2)
After coming on duty, a property-carrying driver may not drive past which consecutive hour?49 CFR 395.3(a)(2)
After how many hours on duty must a passenger-carrying driver stop driving?49 CFR 395.5(a)(2)
An ELD malfunctions. How soon must the driver give the carrier written notice?49 CFR 395.34(a)(1)
How long does a carrier have to correct a malfunctioning ELD?49 CFR 395.34(d)(1)
How many consecutive hours off duty must a property-carrying driver take before driving?49 CFR 395.3(a)(1)
How many consecutive hours off duty restart the 7-day or 8-day period?49 CFR 395.3(c)
How many hours may a bus driver drive after 8 consecutive hours off duty?49 CFR 395.5(a)(1)
How many hours may a property-carrying driver drive within the 14-hour window?49 CFR 395.3(a)(3)(i)
How many previous days of records of duty status must a driver have available for inspection while on duty?49 CFR 395.8(k)(2)
How soon must a driver submit a record of duty status to the carrier?49 CFR 395.8(a)(2)(ii)
In a sleeper berth split, what is the shortest the other rest period may be?49 CFR 395.1(g)(1)(ii)
Short-haul drivers exempt from keeping a record of duty status must stay within what radius?49 CFR 395.1(e)(1)
Trucks built before which model year may run on paper logs instead of an ELD?49 CFR 395.8(a)(1)(ii)
Using the sleeper berth split, how long must the longer rest period be?49 CFR 395.1(g)(1)(ii)
What are the four duty statuses on a record of duty status?49 CFR 395.8(b)
When may a driver keep paper logs instead of using an ELD?49 CFR 395.8(a)(1)(ii)
When must a property-carrying driver take a 30-minute interruption from driving?49 CFR 395.3(a)(3)(ii)
Which of these counts as an adverse driving condition?49 CFR 395.2
Which of these is on-duty time?49 CFR 395.2
Which of these satisfies the 30-minute interruption of driving?49 CFR 395.3(a)(3)(ii)
Whose time standard is used on the record of duty status?49 CFR 395.8(f)(8)
Stopped vehicles and emergency equipment 18
A driver used only fusees at a stop. What must be done before driving away?49 CFR 392.22(b)(2)(i)
A truck stops on the shoulder with a breakdown. What must the driver do first?49 CFR 392.22(a)
A truck stops within 500 feet of a hill crest. Where does the warning device go in that direction?49 CFR 392.22(b)(2)(iv)
A truck that hauls no hazardous materials can meet the extinguisher rule with one 5 B:C unit. What is the other option?49 CFR 393.95(a)(1)(ii)
Before driving, what must the driver check about emergency equipment?49 CFR 392.8
Fuel is leaking from a stopped truck. What does the rule say about flame-producing signals?49 CFR 392.22(b)(2)(vi)
How long must a fusee be capable of burning?49 CFR 393.95(j)
How must the fire extinguisher be kept on the vehicle?49 CFR 393.95(a)(4)
How soon must warning devices be set out when a CMV is stopped on the road or shoulder?49 CFR 392.22(b)(1)
If fusees are carried in place of reflective triangles, how many are required?49 CFR 393.95(f)(2)
May a driver attach a lighted fusee to the vehicle?49 CFR 392.24
May hazard flashers be used instead of warning devices during a long stop on the shoulder?49 CFR 392.22(a)
On a divided or one-way highway, where do the warning devices go?49 CFR 392.22(b)(2)(v)
Under the general rule, where do the three warning devices go?49 CFR 392.22(b)(1)
What fire extinguisher rating does a power unit hauling placarded hazardous materials need?49 CFR 393.95(a)(1)(i)
When are warning devices required for a stop inside a business or residential district?49 CFR 392.22(b)(2)(iii)
Which set of warning devices meets section 393.95?49 CFR 393.95(f)
Which stopped vehicle may not be protected with flame-producing signals?49 CFR 392.25
Railroad crossings 9
A cargo tank used for hazardous materials is empty. Must it stop at railroad crossings?49 CFR 392.10(a)(4)
A truck hauling general freight, not required to stop, approaches a crossing. What does section 392.11 require?49 CFR 392.11
A truck placarded for flammable liquids reaches a crossing controlled by a working traffic signal that shows green. Must it stop?49 CFR 392.10(b)(3)
After stopping at a crossing, what must the driver do before going on?49 CFR 392.10(a)
At which crossing may a bus carrying passengers cross without making the stop that section 392.10 normally requires?49 CFR 392.10(b)
How must a vehicle that was required to stop then cross the tracks?49 CFR 392.10(a)
What must a driver be sure of before entering any railroad crossing, under section 392.12?49 CFR 392.12
Where must a bus carrying passengers stop at a railroad grade crossing?49 CFR 392.10(a)
Which vehicle must stop at railroad grade crossings unless an exception applies?49 CFR 392.10(a)
Driving rules 17
A local traffic law and a federal safety rule both apply, and the federal rule is stricter. Which one is followed?49 CFR 392.2
A truck is stopped at a red light with the engine running. Does the hand-held phone ban apply?49 CFR 392.82(b)
Carbon monoxide has been detected inside the cab. What does section 392.66 say?49 CFR 392.66(a)
Conditions become so dangerous that the truck cannot be driven safely. What must the driver do?49 CFR 392.14
May a carrier schedule a run that can only be finished on time by speeding?49 CFR 392.6
What does section 392.14 require when snow, ice, fog, rain, dust or smoke cut visibility or traction?49 CFR 392.14
What does the rule say about radar detectors?49 CFR 392.71(a)
What may not be hidden by the load, the tailboard or dirt while a CMV is driven?49 CFR 392.33(a)
What must a carrier's written authorization to carry a passenger in a truck state?49 CFR 392.60(a)
What must be true of the engine while a CMV is being fueled?49 CFR 392.50(a)
When does the hand-held phone ban stop applying to a driver?49 CFR 392.82(b)
When may a driver use a hand-held phone while driving a CMV?49 CFR 392.82(c)
Which device is not a mobile telephone under the federal definition?49 CFR 383.5
Which of these is texting under the federal definition?49 CFR 383.5
While fuel is flowing, where must the nozzle be?49 CFR 392.50(c)
Who may ride in a truck without the carrier's written authorization?49 CFR 392.60(a)
Who must wear a seat belt in a property-carrying CMV that has belts installed?49 CFR 392.16
How this list was compiled: Written from the Electronic Code of Federal Regulations, Title 49, Parts 382, 383, 391, 392, 393, 395 and 396, at https://www.ecfr.gov/current/title-49, text in force on 2026-10-01, checked 2026-10-03. Each question names its section. Sections amended in 2026 are cited as amended: 383.31 and 396.9 (June 22, 2026), 392.22, 393.75, 393.95, 396.11 and 396.13 (February 19, 2026), 391.45 and 396.3 (July 21, 2026). Licence: Own work. Questions, answer choices and explanations were written for this site from the regulation text; nothing is copied from a state CDL manual, the AAMVA test item pool or another practice test.
How it works
This unofficial general knowledge CDL practice test has 222 questions from 49 CFR Parts 382, 383, 391 to 393, 395 and 396, checked 3 October 2026. Shifting, backing and skid control are in state manuals, not here.
Read the full guide
What this CDL permit practice test covers
Area 1 of the 20 knowledge areas in 49 CFR 383.111(a) is the safe operations regulations. This bank drills it in ten topics, among them CDL and permit rules (46 questions), vehicle inspection (31), hours of service (27) and cargo securement (20).
Rounds of ten, then a 30 question exam
Practice runs in rounds of ten. The Start from menu under the question picks one topic, and after a round More options holds your Missed questions. Exam mode asks 30 questions, marks nothing until you finish and passes at 24 right, the federal 80 percent. A pass covers the rules only.
Hours of service and disqualifications are mostly numbers: 11 and 14 hours, 60 and 120 days.
Open the source link under an explanation. Several sections changed in 2026, including the stopped-vehicle rule in 392.22.
Print follows each round, and a tick on With answer key adds the answers.
Questions and answers
How many questions are on the general knowledge CDL test?
The CFR gives no number. 49 CFR 383.133 says each test must contain a set number of questions, and 383.135 puts the pass mark at 80 percent. Your state licensing agency's CDL page has its count. Exam mode's 30 is a practice length.
Is there a CDL general knowledge test answers PDF?
Not here, and a list would help little. Under 49 CFR 383.133 a quarter of each new test version is new questions and the three responses change order, so memorized CDL general knowledge test answers go stale. Print, on the score card, puts this bank's questions on paper.
Can I use this as a California CDL practice test, general knowledge section?
For the federal rules, yes. 49 CFR 383.110 has every state test the knowledge listed in Part 383, so the hours of service, inspection and cargo rules are the same. State-only rules and all driving technique come from California's own commercial driver handbook.