Delaware CDL — General Knowledge practice
Delaware CDL — General Knowledge: Signals & Pavement Markings practice test
How to read traffic signals, lane lines, and pavement markings — including yellow and white lines, arrows, and flashing lights.
Content reviewed against official driver handbooks · August 12, 2026
14 questions · pass with 11 correct. You get instant feedback and an explanation after every answer.
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12 sample Signals & Pavement Markings questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
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1. During the seven-step inspection, the walk-around is done with the right turn signal on. In which step is the left turn signal checked?
Correct answer: Step 6, the signal lights check
In Step 6 you get in, turn off all lights, turn on the stop lights and the left turn signal, then get out and check the left front and left rear signals and both stop lights.
Source: Delaware Commercial Driver's Manual — Section 2.1.5, Seven-step Inspection Method
2. In Step 5 of the seven-step inspection, after checking the headlights and four-way flashers from the front, which lights do you switch on before walking around the vehicle?
Correct answer: Clearance, parking, identification, and side-marker lights, plus the right turn signal
After confirming low beams, flashers, and high beams, you turn the headlights and flashers off, switch on the parking, clearance, side-marker, and identification lights along with the right turn signal, and begin the walk-around.
Source: Delaware Commercial Driver's Manual — Section 2.1.5, Seven-step Inspection Method
3. According to Delaware's manual, how does an officer begin a traffic stop?
Correct answer: By giving a visible or audible signal, such as emergency lights or a siren
The manual says an officer initiates the stop with a signal you can see or hear, which could include emergency lights or sirens.
Source: Delaware Commercial Driver's Manual — What to Do and Expect When Stopped by Law Enforcement
4. You see police emergency lights come on behind your truck in Delaware. What does the manual tell you to do first?
Correct answer: Stay calm, turn on your turn signal, and pull off the roadway as soon as it is safe
The manual's steps are to stay calm, signal, and move off the roadway or to its side as soon as you safely can.
Source: Delaware Commercial Driver's Manual — What to Do and Expect When Stopped by Law Enforcement
5. You wave a following driver around your truck to show it is safe to pass, and a crash follows. What consequence does the manual warn about?
Correct answer: The blame could fall on you, at a cost of thousands of dollars
The manual says not to direct traffic. Signaling others that it is safe to pass could cause an accident, you could be held to blame, and the cost could run into many thousands of dollars.
Source: Delaware Commercial Driver's Manual — Section 2.5.1, Signal Your Intentions
6. When you look ahead for traffic, which lights on other vehicles does the manual tell you to watch for?
Correct answer: Brake lights on vehicles that are slowing
Looking ahead means watching for vehicles entering the highway, moving into your lane, or turning, and for brake lights from slowing vehicles, so you can adjust speed or change lanes early.
Source: Delaware Commercial Driver's Manual — Section 2.4.1, Seeing Ahead
7. Before you begin backing with a helper, what should the two of you work out?
Correct answer: A set of hand signals you both understand
The helper stands near the back where you can see them, and before backing starts you agree on hand signals both of you understand, including one that means stop.
Source: Delaware Commercial Driver's Manual — Section 2.2.4, Backing Safely
8. Switching from high beams to low beams shortens how far you can see at night. By the manual's figures, what is the change?
Correct answer: From about 350 to 500 feet down to about 250 feet
The manual puts low-beam sight distance at roughly 250 feet and high-beam distance at roughly 350 to 500 feet, so speed must come down when low beams are required.
Source: Delaware Commercial Driver's Manual — Section 2.11.4, Vehicle Factors
9. The manual lists specific moments to check your mirrors during a lane change. How many are there?
Correct answer: Four: before, after signaling, right after starting, and after finishing
You check before changing lanes, again after signaling, again right after you start to move over, and once more when the lane change is complete.
Source: Delaware Commercial Driver's Manual — Section 2.4.2, Seeing to the Sides and Rear
10. Your headlights do not point in the right direction. Who does the manual say should adjust them?
Correct answer: A qualified person
Headlights that are out of adjustment give a poor view and can blind other drivers, so the manual says the adjustment should be done by a qualified person.
Source: Delaware Commercial Driver's Manual — Section 2.11.4, Vehicle Factors
11. An oncoming vehicle's headlights are glaring at night. Which pavement marking does the manual suggest you look toward?
Correct answer: The right lane or edge marking
Rather than staring into the oncoming lights, the manual says to shift your gaze a little to the right and use the right lane line or edge line if there is one.
Source: Delaware Commercial Driver's Manual — Section 2.11.5, Night Driving Procedures
12. A car is tailgating your truck and you need to slow for a turn ahead. How does the manual say to handle your signal and speed?
Correct answer: Signal early and slow down very gradually
With a tailgater behind, the manual says to avoid quick changes: signal early and bring your speed down gradually. It also warns against tricks such as flashing the brake lights.
Source: Delaware Commercial Driver's Manual — Section 2.7.2, Space Behind
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