Hawaii General Knowledge CDL Prep Test (HI) 4

5 out of 5 (38 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Aloha! Welcome to your fourth Hawaii General Knowledge CDL Practice Test, a crucial step towards mastering the skills needed for your commercial driver's license in Hawaii. Our practice test is designed to mimic the real DMV written test, offering a comprehensive understanding of what to expect. With 20 carefully crafted CDL test questions, this test ensures you cover a broad range of topics necessary for your CDL. One of the key advantages of our Hawaii general knowledge CDL practice test is its stress-free nature. We understand that the actual DMV test can be daunting, so we've created a learning environment that's calm and conducive to effective study. Here, you don't have to worry about the pressures of passing on your first attempt. Instead, you can focus on learning at your own pace, ensuring you fully understand each concept. Feedback is crucial in learning, and that's why, after each CDL test question, you'll receive immediate and detailed feedback. This isn't just about knowing the right answer; it's about understanding the reasoning behind it. Whether you answer correctly or not, you'll get an explanation that helps solidify your knowledge and clears any doubts, making your learning experience richer and more effective. We encourage multiple attempts at this Hawaii CDL practice test. Each time you take it, you reinforce your knowledge and boost your confidence. This DMV practice test remains consistent in its question set, allowing you to track your progress and focus on areas where you need improvement. You can take this CDL general knowledge practice test as many times as you need, ensuring you're completely comfortable and prepared before moving on to the next level. As you progress through this Hawaii CDL practice test, remember that each step brings you closer to achieving your goal in 2026. We're here to support you on this path to success. So take a deep breath, relax, and let's get started!
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Sample Hawaii CDL Test Questions - General Knowledge

Question 1

Which statement about commercial-vehicle tire pressure is correct?

  1. A Air should be released from warm tires until they reach the cold-pressure specification
  2. B Tire pressure does not need to be checked during a pre-trip inspection
  3. C Tire air pressure increases as tire temperature rises
  4. D All of the above

Correct answer: C – Tire air pressure increases as tire temperature rises

The Hawaii CDL manual explains that tire pressure increases as temperature rises. Do not release air merely because a tire’s pressure increased from heat; the pressure may become too low when the tire cools. Tire mounting and inflation should be checked, with additional inspections every two hours or 100 miles when driving in very hot weather.

Source: Hawaii Commercial Driver License Manual (June 2025) — § 2.14.1, “Vehicle Checks—Tires”

Question 2

What are the functions of the emergency air line on a combination vehicle?

  1. A It supplies air to the trailer air tanks
  2. B It controls the trailer emergency brakes
  3. C Both A and B
  4. D It performs neither function

Correct answer: C – Both A and B

The emergency air line supplies air to the trailer’s air tanks and controls the emergency brakes on a combination vehicle. If pressure is lost in this line, the trailer emergency brakes apply and the tractor-protection valve closes. Emergency lines are commonly identified by red hoses, couplers, or other red components.

Source: Hawaii Commercial Driver License Manual (June 2025) — § 6.2.4, “Trailer Air-lines—Emergency Air-line”

Question 3

What is the main safety advantage of backing toward the driver’s side?

  1. A Traffic law requires all backing turns to be made that way
  2. B The maneuver always takes less time
  3. C The driver has a better view of the vehicle’s path
  4. D The passenger-side mirror does not need to be checked

Correct answer: C – The driver has a better view of the vehicle’s path

The Hawaii CDL manual recommends backing and turning toward the driver’s side whenever possible because visibility is better. From that position, you can watch the rear of the vehicle through the side window while continuing to check both mirrors. Passenger-side backing is more hazardous because more of the vehicle’s path is hidden from view.

Source: Hawaii Commercial Driver License Manual — § 2.2.2, “Backing Safely”

Question 4

What does a posted DO NOT PASS sign require?

This sign indicates that the driver should _____________.
  1. A Pass only when traffic is light
  2. B Do not overtake another vehicle in the no-passing zone
  3. C Prepare to stop at the next intersection
  4. D Complete any pass as quickly as possible

Correct answer: B – Do not overtake another vehicle in the no-passing zone

In Hawaii, signs and markings establishing a no-passing zone must be obeyed. A driver may not travel to the left side of the roadway or cross the pavement striping that defines the zone, subject to limited statutory exceptions. The DO NOT PASS sign marks or emphasizes this passing restriction.

Source: HRS § 291C-47(a)–(c) — No-passing zones, Manual on Uniform Traffic Control Devices for Streets and Highways, 11th ed. with Revision 1 — § 2B.36, “DO NOT PASS Sign (R4-1)”

Question 5

The Hawaii CDL manual states that alcohol-involved traffic crashes result in more than approximately how many deaths each year?

  1. A 10,000
  2. B 20,000
  3. C 30,000
  4. D 40,000

Correct answer: B – 20,000

The manual states that people who drink alcohol are involved in traffic crashes resulting in more than 20,000 deaths annually. Alcohol impairs reaction time, coordination, depth perception, night vision, and judgment. Even a small amount can begin affecting the abilities needed to operate a commercial vehicle safely.

Source: Hawaii Commercial Driver License Manual — § 2.22.1, “Alcohol and Driving”

Question 6

How much time does a typical tractor-trailer need to clear two railroad tracks?

  1. A More than 13 seconds
  2. B More than 14 seconds
  3. C More than 15 seconds
  4. D More than 16 seconds

Correct answer: C – More than 15 seconds

A typical tractor-trailer takes more than 15 seconds to clear a double track. It takes at least 14 seconds to clear a single track. Before starting across, the driver must make certain there is enough room for the entire vehicle to clear the tracks without stopping, and the driver should not shift gears while crossing.

Source: Hawaii Commercial Driver License Manual — § 2.15.5, “Crossing the Tracks”

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