CDL General Knowledge Questions with Correct Answers Graded A+ When you are in a 60 foot vehicle, how much space should you maintain in front of you at highway speeds? - Correct Answer Seven seconds What is the first thing to do if your vehicle catches fire while driving? - Correct Answer Pull off the road and park in an open area The best way to put out a fire is to: - Correct Answer Stand upwind and spray the base of the fire
What are some causes of vehicle fires (3): - Correct Answer * Spilled fuel
- Short circuits
- Driver smoking
- In case there are cars following too closely
- In case there is an obstacle in the road.
Safe drivers must maintain space around their vehicles for the following reasons (3): - Correct Answer * In case you must stop suddenly
Hydroplaning can occur when you drive through water or slush. If you experience hydroplaning you
should: - Correct Answer Release the accelerator and push in the clutch
When making a right hand turn, you should always: - Correct Answer Keep the rear of your vehicle close to the curb A front wheel skid is usually caused by (3): - Correct Answer * Driving too fast for conditions
- Lack of tread on the front tires
- Cargo improperly loaded 1 / 2
Driving at night is more dangerous because of the following (3): - Correct Answer * Most people are less alert at night due to fatigue
- Headlights often cause glare which can blind drivers
- There are more drunk drivers at night
- After you have driven for three hours
- After you take a break
- When there are broken valve stems
- If the tread depth on your front tires is less than 4/32 deep
- A vehicle transporting hazardous materials
- A vehicle transporting 16 or more passengers
- / 2
How often should you check your cargo (3)? - Correct Answer * Within 25 miles after beginning a trip
An engine retarder is designed to: - Correct Answer Slow the vehicle down without using brakes When should tires be replaced (3)? - Correct Answer * When the tread separates
In the event of a tire failure, you should: - Correct Answer Stay off the brake and hold the steering wheel firmly Your vehicle is going down a long hill and your brakes begin to fail. What should you do? - Correct Answer Look for an escape ramp or an escape route The definition of a commercial motor vehicle is (3): - Correct Answer * A vehicle with a gross weight over 26,001 lbs
When driving at highway speeds, you should look 12-15 seconds ahead which is: - Correct Answer At least a quarter of a mile When driving in heavy traffic you should travel: - Correct Answer At a speed consistent with the flow of traffic