Colorado CDL Practice Test Questions and Answers (CO) 7

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80% Passing score
50 Questions
10 Mistakes allowed
Ready to tackle the Colorado CDL General Knowledge Practice Test? You're in the right spot! This seventh test in our series is a crucial step in preparing for your CDL exam. With 50 carefully crafted Colorado CDL test questions, you're set for a comprehensive review. To pass, you need at least 40 correct answers, but don't fret; each attempt offers the same set of questions, allowing you to focus on mastering every single one. Our general knowledge test dives deep into essential topics like road signs, rules of the road, traffic signals, and pavement markings. It's designed to mirror the actual Colorado CDL permit test, giving you a realistic practice experience. Every Colorado CDL test question follows the multiple-choice or true/false format, identical to what you'll encounter at the DMV. This setup is ideal for honing your skills in identifying the correct answers by methodically eliminating the incorrect ones. One of the best parts? It's absolutely free. We believe in providing quality resources without the hefty price tag. Our Colorado CDL practice test is as feature-rich and informative as any paid version out there. This means you can prepare for your CDL exam without breaking the bank. As you work through the test, you'll find integrated study aids for those trickier questions. If you're stumped, these aids are there to help guide you to the right answer. And once you complete your Colorado CDL general knowledge practice test, you'll get a detailed summary of your performance. This summary is invaluable, highlighting the questions you missed and providing the correct answers for further learning. So, take advantage of this fantastic resource. Use it to build your knowledge and confidence as you prepare to ace your Colorado CDL exam. Let's get those wheels rolling towards your CDL success!
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Sample Colorado CDL Test Questions - General Knowledge

Question 1

After the initial 50-mile cargo check, what uninterrupted driving interval requires another inspection?

  1. A 1 hour or 100 miles
  2. B 2 hours or 200 miles
  3. C 3 hours or 150 miles, whichever occurs first
  4. D 4 hours or 400 miles

Correct answer: C – 3 hours or 150 miles, whichever occurs first

Federal regulations require cargo and load-securement devices to be reexamined after three hours of driving or 150 miles, whichever occurs first. A change in the driver's duty status can require an earlier inspection. Cargo must also be inspected within the first 50 miles after beginning the trip, subject to the exceptions for certain sealed or impracticable-to-inspect loads.

Source: Colorado Commercial Driver License Manual — § 3.1, “Inspecting Cargo”, 49 CFR § 392.9(b)(2)–(4) — Inspection of cargo, cargo securement devices and systems

Question 2

Some over-the-counter cold medicines can cause driver drowsiness. True or false?

  1. A True
  2. B False

Correct answer: A – True

Prescription and over-the-counter cold medicines may cause drowsiness or otherwise reduce safe driving ability. Read warning labels and follow medical instructions about possible effects before operating a commercial vehicle. Do not drive after taking a medication if it makes you sleepy or impairs your ability to operate safely.

Source: Colorado Commercial Driver License Manual — § 2.22.2, “Other Drugs”

Question 3

At the front of a commercial vehicle, which group contains lighting items that should be inspected?

  1. A Fuel tank, engine, and tires
  2. B Brake chambers, air lines, and suspension
  3. C Turn signals, clearance lights, and headlights
  4. D Coupling system, landing gear, and trailer rims

Correct answer: C – Turn signals, clearance lights, and headlights

The exterior-light check includes the turn signals, four-way flashers, low- and high-beam headlights, and clearance or marker lights. Verify that the lights operate and illuminate when selected. At the front, also inspect the lenses or covers to ensure they are the proper color, clean, present, and free of damage.

Source: Colorado Commercial Driver License Manual — § 11M.4, “Lights Operations Check (All Vehicles)”; § 11M.5.1, “Front of Vehicle / Engine Area (Engine Off)”

Question 4

Besides keeping cargo low, which driving practice helps prevent a combination vehicle from rolling over?

  1. A Adjusting the brakes immediately before every turn
  2. B Holding the steering wheel as tightly as possible
  3. C Taking turns and ramps at a slow, controlled speed
  4. D Eliminating all fifth-wheel free play

Correct answer: C – Taking turns and ramps at a slow, controlled speed

Keeping cargo close to the ground lowers the vehicle's center of gravity, but speed control is also essential. Rollovers frequently occur when a driver enters a turn too fast. Take corners, entrance ramps, and exit ramps slowly, keep the load centered, and avoid abrupt lane changes, especially when the vehicle is fully loaded.

Source: Colorado Commercial Driver License Manual — § 6.1.1, “Rollover Risks”

Question 5

On a combination vehicle, what are the two functions of the emergency air line?

  1. A It carries air to the trailer air tanks
  2. B It controls the trailer emergency brakes
  3. C Both A and B
  4. D Neither A nor B

Correct answer: C – Both A and B

Colorado’s CDL manual identifies two functions for the emergency, or supply, line. It fills the trailer air tanks and controls the emergency brakes on combination vehicles. A loss of pressure in this line causes the trailer emergency brakes to apply and the tractor protection valve to close.

Source: Commercial Driver License Manual — § 6.2.4, “Trailer Air-lines”

Question 6

May you remove the radiator cap before the pressurized cooling system has cooled?

  1. A YES
  2. B NO

Correct answer: B – NO

Never remove a radiator cap or another part of a pressurized cooling system until the system has cooled. Hot coolant and steam can escape under pressure and cause severe burns. A coolant recovery container that is not part of the pressurized system is treated differently, but the radiator cap must remain closed while the system is hot.

Source: Commercial Driver License Manual — § 2.14.1, “Vehicle Checks”

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