North Dakota CDL — General Knowledge practice
North Dakota CDL — General Knowledge: Road Signs practice test
Learn the shapes, colors, and meanings of regulatory, warning, and guide signs — from stop and yield to construction and school-zone signs.
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 Road Signs 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. You do not know whether your vehicle needs placards. Whom does the manual tell you to ask?
Correct answer: Your employer
Anyone who needs the hazardous materials endorsement has to know the placard rules, and a driver unsure whether a vehicle needs placards is told to check with the employer.
Source: North Dakota Commercial Driver License Manual — Section 2.24.3, Lists of Regulated Products
2. A North Dakota school bus is used on a weekend to carry adults to a company event. What must be done about the words 'School Bus'?
Correct answer: They must be covered or removed
Whenever the bus is used for anything other than transporting school children, the lettering has to be covered or taken off.
Source: North Dakota Commercial Driver License Manual — North Dakota Information, Bus Equipment and Standards
3. Your vehicle is stuck on a railroad crossing and you are reporting it. Which identifier does the manual especially want you to give if it is posted?
Correct answer: The crossing's DOT number
When calling, describe where the crossing is using every landmark you can identify, and above all the DOT number if one is posted there.
Source: North Dakota Commercial Driver License Manual — Section 2.15.6, Special Situations
4. On shipping papers, can a single hazardous materials identification number refer to more than one chemical?
Correct answer: Yes, one number may identify more than one chemical
Identification numbers are four-digit codes that first responders rely on, and the manual notes that the same number can cover several chemicals.
Source: North Dakota Commercial Driver License Manual — Section 2.24.3, Lists of Regulated Products
5. North Dakota's state highway system has several clearances lower than the legal vehicle height limit. How does the manual say to learn exactly where they are?
Correct answer: Contact the State Highway Patrol
Because some clearances on state highways are below the 14-foot legal height, the manual tells drivers to ask the Highway Patrol where they are.
Source: North Dakota Commercial Driver License Manual — North Dakota Information, Height
6. A passive railroad crossing has no traffic control device. What does the manual say is there to help you recognize it?
Correct answer: Round yellow advance warning signs, markings on the pavement, and crossbucks
Because nothing regulates traffic at a passive crossing, the decision to stop or go is yours. Advance warning signs, pavement markings, and crossbuck signs are provided so you can spot the crossing.
Source: North Dakota Commercial Driver License Manual — Section 2.15.1, Types of Crossings
7. You are stopped while driving a vehicle that needs placards, and your license has no hazardous materials endorsement. What does the manual say will happen?
Correct answer: You will be cited and not allowed to drive the truck any farther
Driving a placarded vehicle without the endorsement is a crime. Once stopped, the driver is cited and barred from taking the truck any farther, which costs both time and money.
Source: North Dakota Commercial Driver License Manual — Section 2.24.3, Lists of Regulated Products
8. North Dakota exempts certain Class A license holders from the hazardous materials endorsement when they drive a service vehicle carrying 1,000 gallons or less of diesel. How must that vehicle be marked?
Correct answer: With the appropriate 'flammable' or 'combustible' placard
The exemption covers employees of custom harvesters, agrichemical businesses, farm retail outlets and suppliers, and livestock feeders working in their home state, but only when the diesel service vehicle clearly shows the proper placard.
Source: North Dakota Commercial Driver License Manual — North Dakota Information, Additional Endorsement Information
9. North Dakota school buses carry the words 'School Bus' at the front and the rear. How tall must the letters be?
Correct answer: Eight inches
State bus standards call for the words on both ends of the bus in letters eight inches high.
Source: North Dakota Commercial Driver License Manual — North Dakota Information, Bus Equipment and Standards
10. Every North Dakota school bus must carry a sign on its rear. What does that sign tell following drivers?
Correct answer: That the school bus stops at all railroad crossings
State standards require a sign on the back of every school bus announcing that it stops at every railroad crossing.
Source: North Dakota Commercial Driver License Manual — North Dakota Information, Bus Equipment and Standards
11. Your CDL road test route has neither a bridge nor an overpass. What may the examiner ask you about instead?
Correct answer: Another traffic sign along the route
Normally the examiner may ask for the posted clearance after an overpass or the posted weight limit after a bridge. Without either on the route, you may be asked about a different traffic sign, so be ready to identify and explain any sign you pass.
Source: North Dakota Commercial Driver License Manual — Section 13.1.9, Bridge/Overpass/Sign
12. During the student discharge on the road test, what does a school bus driver activate once the bus has stopped and been secured?
Correct answer: The stop arm and red warning lights
On approach the driver uses the amber warning lights and the right turn signal. After stopping well short of the students, shifting to neutral or park, and setting the parking brake, the driver puts out the stop arm and turns on the red warning lights.
Source: North Dakota Commercial Driver License Manual — Section 13.1.10, Student Discharge (School Bus)
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