Delaware General Knowledge CDL Prep Test (DE) 4

4.9 out of 5 (42 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you gearing up to ace the Delaware CDL exam? Dive into our fourth Delaware general knowledge CDL practice test, a critical step in your preparation in 2026. Our test mirrors the real exam in spirit, but offers a faster-paced study session with 20 well-crafted questions that you must tackle. Scoring at least 16 correct answers is your goal here. But don't worry, the challenge remains the same every time you attempt it, allowing you to measure your progress accurately. What sets our Delaware general knowledge CDL test practice apart is its concentration on vital driving knowledge. From understanding pre-trip inspection protocols to mastering vehicle control and safely transporting cargo, our questions span the spectrum of essential CDL skills. These topics are pivotal in ensuring that you're not just ready for the written permit test, but also for real-world driving scenarios, particularly those involving emergencies. Delaware-specific rules and regulations are at the heart of this Delaware CDL practice test. We understand that driving laws and road signages are unique to each state. Therefore, we've tailored our DMV test to reflect Delaware's specific driving requirements, giving you a localized and relevant practice experience. Here's the best part - it's absolutely free. We believe in providing equal learning opportunities for all aspiring CDL drivers. While other platforms might charge for such resources, we ensure that you get the same, if not more, out of our practice tests without spending a penny. Our 2026 Delaware DMV CDL general knowledge test offers a comprehensive learning experience, equipping you with the knowledge and confidence needed to succeed. So, if you're set to secure your CDL in Delaware, our drivers practice test is an invaluable resource. It's a blend of practical knowledge, state-specific insights, and an accessible format, all designed to help you excel in your CDL exam.
FREE CDL Practice Test App
Pass your Delaware CDL General Knowledge test with the NextDoorDriving app. Real questions and answers—100% free and ad-free.
Download on the App Store

Sample Delaware CDL Test Questions - General Knowledge

Question 1

What should you verify when inspecting a trailer’s front-end header board?

  1. A It is in good condition and can block forward cargo movement
  2. B Every trailer has a canvas carrier attached to it
  3. C It can be loosened to absorb cargo movement
  4. D Small holes and structural cracks are acceptable

Correct answer: A – It is in good condition and can block forward cargo movement

Inspect the front-end header board or structure for a condition strong enough to restrain forward cargo movement. It must not be weakened by damage that would prevent it from performing that function. Cargo must still be properly distributed and secured; the header board is not a substitute for required cargo-securement devices.

Source: Delaware Commercial Driver’s Manual — § 3.3.3, “Header Boards”

Question 2

What is the basic difference between gross combination weight and gross combination weight rating?

  1. A GCW is the rated maximum, while GCWR is the vehicle’s actual weight
  2. B GCW covers only the power unit, while GCWR covers only the trailer
  3. C GCW is the combination’s actual total weight, while GCWR is its rated maximum combined weight
  4. D The two terms have the same meaning

Correct answer: C – GCW is the combination’s actual total weight, while GCWR is its rated maximum combined weight

Gross combination weight is the actual total weight of the powered unit, towed vehicle or vehicles, and cargo. Gross combination weight rating is the rated maximum combined weight rather than the combination’s current scale weight. When no manufacturer’s GCWR is specified, the applicable CDL definition provides a method for determining the rating.

Source: Delaware Commercial Driver’s Manual — § 3.2.1, “Definitions You Should Know”, 49 CFR § 383.5 – Definitions

Question 3

A yellow diamond sign showing one arrow pointing up and another pointing down warns that:

This sign warns drivers to _____________.
  1. A You are approaching a crossroad
  2. B Two-way traffic begins ahead
  3. C The road ahead becomes one-way
  4. D Through traffic must turn

Correct answer: B – Two-way traffic begins ahead

This sign warns that the roadway ahead will carry traffic in both directions. It is commonly placed where a divided roadway transitions to an undivided, two-way roadway or where a one-way street becomes two-way. Be prepared for oncoming vehicles and remain on the correct side of the roadway.

Source: Manual on Uniform Traffic Control Devices, 11th ed., rev. 1 — § 2C.51, “Two-Way Traffic Sign (W6-3)”

Question 4

Coffee is a dependable substitute for sleep when a commercial driver becomes drowsy.

  1. A TRUE
  2. B FALSE

Correct answer: B – FALSE

Caffeine may briefly increase awareness, but its effects wear off and it should not be relied upon to prevent fatigue. The Delaware CDL manual states that a drowsy driver should get off the road and sleep. Proper rest is the only safe cure when you become sleepy behind the wheel.

Source: Delaware Commercial Driver’s Manual — § 2.11, “Fatigue and Lack of Alertness”

Question 5

What should you do before entering a curve?

  1. A Reduce speed and select the proper gear
  2. B Shift to a higher gear and accelerate
  3. C Stop at the beginning of every curve

Correct answer: A – Reduce speed and select the proper gear

Slow to a safe speed and select the proper gear before entering the curve. Braking or shifting during the turn can reduce stability and increase the risk of a skid or rollover. The selected gear should allow you to apply slight power through the curve and accelerate smoothly when leaving it.

Source: Delaware Commercial Driver’s Manual — § 2.3.1, “Manual Transmissions”, Delaware Commercial Driver’s Manual — § 2.6.3, “Speed and Curves”

Question 6

When should a vehicle’s retarder be switched off?

  1. A When the roadway is wet, icy, or snow-covered
  2. B Whenever the vehicle enters mountainous terrain
  3. C Only while traveling on clear, dry pavement
  4. D A driver cannot switch off a retarder

Correct answer: A – When the roadway is wet, icy, or snow-covered

A retarder applies its braking force to the drive wheels. On wet, icy, or snow-covered pavement, those wheels may have insufficient traction and could skid when the retarder engages. Switch the retarder off under these conditions and use appropriate speed and braking techniques.

Source: Delaware Commercial Driver’s Manual — § 2.3.4, “Retarders”

More Delaware CDL Practice Tests
Other CDL Endorsements