California CDL Practice Test Questions and Answers (CA) 7

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80% Passing score
50 Questions
10 Mistakes allowed
Navigating the path to earning your California Commercial Driver's License (CDL) brings you to our seventh California CDL practice test. This essential tool is designed to prepare you thoroughly for what lies ahead. Featuring 50 carefully crafted questions, the CDL practice test requires a minimum of 40 correct answers to pass. The beauty of this practice test lies in its consistency; the same set of questions appears each time, allowing for focused study and repetition. What sets this California DMV practice test apart is its integration of real-life scenarios. Expect to encounter questions that place you right in the driver's seat, challenging you to apply your theoretical knowledge to practical, on-the-road situations. This approach not only tests your understanding but also enhances your ability to think and react like a professional driver. The CDL test's authenticity is a key aspect. Crafted to mirror the actual DMV permit test, both in format and content, it serves as an accurate rehearsal for the real deal. You'll find yourself navigating through questions on road signs, rules of the road, traffic signals, and pavement markings, all typical of what the actual CDL test presents. In crafting this invaluable resource, we've enlisted the expertise of seasoned driving instructors. These professionals, with a wealth of teaching experience and a track record of helping thousands earn their licenses, have meticulously written and reviewed each question. Their insights ensure that every question not only teaches but also tests you in a way that's true to the California CDL test experience. Whether it's a tricky question or a concept you're grappling with, the test's integrated study aids are always at your service. Use them to strengthen your understanding and confidence as you move closer to achieving your CDL. This California CDL practice test is more than a study tool; it's a strategic partner in your journey to becoming a licensed commercial driver in California.
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Sample California CDL Test Questions - General Knowledge

Question 1

Besides keeping cargo low, what should a combination-vehicle driver do to reduce rollover risk?

  1. A Check brake adjustment before every turn
  2. B Hold the steering wheel as tightly as possible
  3. C Drive slowly around turns
  4. D Eliminate all fifth-wheel free play

Correct answer: C – Drive slowly around turns

Keeping cargo close to the ground lowers the vehicle's center of gravity. The other key rollover-prevention practice is driving slowly around turns, corners, entrance ramps, and exit ramps. Drivers should also avoid quick lane changes, particularly when the combination vehicle is fully loaded.

Source: California Commercial Driver Handbook — § 6.1.1, “Rollover Risks”

Question 2

Which preparation helps prevent distracted driving?

  1. A Eating a heavy meal immediately before driving
  2. B Relying on coffee to maintain concentration
  3. C Learning vehicle controls and making adjustments before moving
  4. D Programming the GPS after entering traffic

Correct answer: C – Learning vehicle controls and making adjustments before moving

The California handbook recommends eliminating in-vehicle distractions before driving begins. Become familiar with the vehicle's equipment and adjust controls and mirrors before moving. Radio stations and navigation should also be programmed in advance, and drivers should not type or read messages while operating the vehicle.

Source: California Commercial Driver Handbook — § 2.9.6, “Do Not Drive Distracted”

Question 3

Approximately how long does a typical tractor-trailer need to clear a double railroad track?

  1. A About 8 seconds
  2. B About 10 seconds
  3. C More than 15 seconds
  4. D More than 25 seconds

Correct answer: C – More than 15 seconds

A typical tractor-trailer takes at least 14 seconds to clear a single railroad track and more than 15 seconds to clear a double track. Before starting across, the driver must verify that there is enough space to get the entire vehicle across without stopping on the tracks.

Source: California Commercial Driver Handbook — § 2.15.5, “Crossing the Tracks”

Question 4

An orange diamond-shaped highway warning sign generally indicates:

  1. A A temporary road work or maintenance condition
  2. B A general permanent roadway warning
  3. C Route or destination information
  4. D A mandatory stop

Correct answer: A – A temporary road work or maintenance condition

In California, temporary traffic-control warning signs ordinarily have black legends and borders on orange or fluorescent-orange backgrounds. They alert road users to conditions associated with work zones or other temporary roadway activities. Drivers should read each sign and prepare for the specific condition shown.

Source: California MUTCD 2026 — § 6H.01, “Warning Sign Function, Design, and Application”

Question 5

During a pre-trip inspection of the brakes and suspension, which condition should you verify?

  1. A Brake shoes and pads are free of oil, grease, and brake fluid
  2. B A missing leaf in a leaf spring can be ignored
  3. C A cracked spring hanger is acceptable if the axle is aligned
  4. D Brake contamination is acceptable when the linings are thick

Correct answer: A – Brake shoes and pads are free of oil, grease, and brake fluid

California's commercial handbook identifies oil, grease, or brake fluid on brake shoes or pads as a brake defect. Contamination interferes with the friction needed for effective braking. The handbook also warns that cracked spring hangers and missing or broken spring leaves are dangerous suspension defects and should not be treated as acceptable conditions.

Source: California Commercial Driver Handbook — § 2.1.3, “Bad Brake Drums or Shoes”, California Commercial Driver Handbook — § 2.1.3, “Suspension System Defects”

Question 6

Which two indicators help a driver determine when to upshift a manual commercial vehicle?

  1. A Engine sound and coolant temperature
  2. B Engine speed and road speed
  3. C Time in the current gear and clutch-pedal movement
  4. D Oil pressure and cargo weight

Correct answer: B – Engine speed and road speed

Engine speed and road speed are the two main shifting indicators. The tachometer shows engine rpm, which should remain within the vehicle manufacturer's operating range. The speedometer helps the driver recognize the road-speed range appropriate for each gear. Engine temperature or elapsed time in a gear does not determine the proper shift point.

Source: California Commercial Driver Handbook — § 2.3.1, “Knowing When to Shift Up”

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