Rhode Island CDL — General Knowledge practice
Rhode Island 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
13 questions · pass with 10 correct. You get instant feedback and an explanation after every answer.
Choose your level
Up to 20 questions on this topic, with feedback after every answer.
Study questions with answers
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.
Show all 12 questions with answers
1. Besides special permits, what might an over-width load need on the road?
Correct answer: 'Wide load' signs, flashing lights or flags, and possibly an escort
Oversized loads may need special equipment such as wide-load signs, flashing lights and flags. Some need a police escort or pilot vehicles, and travel is often limited to certain times.
Source: Rhode Island CDL Manual — Section 3: Transporting Cargo Safely (Cargo Needing Special Attention)
2. On the manual's hazard class table, lighter fluid is an example of which category?
Correct answer: Combustible Liquids, which has no class number
Fuel oils and lighter fluid are the examples for Combustible Liquids, one of the rows without a class number. Gasoline and acetone are the Class 3 examples.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Hazardous Materials Rules for All Commercial Drivers)
3. What does a school bus safety arm do?
Correct answer: Makes students cross well out in front of the bus, about 10 feet, where the driver can see them
The safety arm forces students to walk well out from the front of the bus, about 10 feet, so they stay in the driver's view while crossing.
Source: Rhode Island CDL Manual — Section 11: Vehicle Inspection Test (School Bus Only)
4. In many states the posted speed limit for trucks and buses is lower than for cars. By how much can the difference be?
Correct answer: As much as 15 mph
Truck and bus limits can sit as much as 15 mph below the car limit in some states, so take extra care changing lanes or passing on those roads.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Controlling Speed)
5. Ammonium nitrate and hydrogen peroxide belong to which hazard class?
Correct answer: Class 5, Oxidizers
The manual's hazard class table gives ammonium nitrate and hydrogen peroxide as examples of Class 5, Oxidizers.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Hazardous Materials Rules for All Commercial Drivers)
6. Besides shipping papers, what does a shipper use to warn dockworkers and drivers about a hazardous material?
Correct answer: Diamond-shaped hazard labels
One goal of the hazmat rules is communicating risk: shippers use shipping papers and diamond-shaped hazard labels so the people handling the load know the danger.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Hazardous Materials Rules for All Commercial Drivers)
7. A shipment of matches falls under which hazard class?
Correct answer: Class 4, Flammable Solids
Matches and fuses are the manual's examples of Class 4, Flammable Solids.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Hazardous Materials Rules for All Commercial Drivers)
8. When do posted work zone speed limits apply to you?
Correct answer: At all times as you approach and drive through the zone
Obey posted work zone limits the whole time you approach and travel through the zone, and slow down further for bad weather or a worker close to the road.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Controlling Speed)
9. On a mountain route, how will you find out where the escape ramps are?
Correct answer: Signs show drivers where the ramps are located
Know where the escape ramps are on your route. Signs point drivers to them, and if your brakes fail on a downgrade, use one.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Mountain Driving)
10. In states that have move-over laws, how does the manual say drivers are made aware of them?
Correct answer: Signs about the law are posted on the roadways
Move-over laws require drivers to slow and change lanes near roadside incidents and emergency vehicles. States with such laws post signs on their roads.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Seeing Hazards — Hazardous Roads)
11. The manual's note with the round black-on-yellow railroad advance warning sign says certain vehicles are required to stop. Which ones?
Correct answer: All vehicles carrying passengers or hazardous materials
The advance warning sign tells everyone to slow, look and listen and be ready to stop. The manual adds that passenger-carrying and hazmat-carrying vehicles must stop.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Railroad-highway Crossings)
12. Battery acid falls under which hazard class on the manual's chart?
Correct answer: Class 8, Corrosives
The hazard class table lists hydrochloric acid and battery acid as examples of Class 8, Corrosives.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Hazardous Materials Rules for All Commercial Drivers)
More CDL — General Knowledge topics
Practice Road Signs in another state
Every Rhode Island question is written from the official Rhode Island driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free