CDL GENERAL KNOWLEDGE PRACTICE
EXAM|| 2025 ACTUAL EXAM ALL QUESTIONS
AND 100% CORRECT ANSWERS ALREADY
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When you are in a 60 foot vehicle, how much space should you maintain in front
of you at highway speeds? - ANSWER: Seven seconds
What is the first thing to do if your vehicle catches fire while driving? -
ANSWER: Pull off the road and park in an open area
The best way to put out a fire is to: - ANSWER: Stand upwind and spray the base
of the fire
What are some causes of vehicle fires (3): - ANSWER: * Spilled fuel
* Short circuits
* Driver smoking
Safe drivers must maintain space around their vehicles for the following reasons
(3): - ANSWER: * In case you must stop suddenly
* In case there are cars following too closely
* In case there is an obstacle in the road.
Hydroplaning can occur when you drive through water or slush. If you experience
hydroplaning you should: - ANSWER: Release the accelerator and push in the
clutch
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When making a right hand turn, you should always: - ANSWER: Keep the rear of
your vehicle close to the curb
A front wheel skid is usually caused by (3): - ANSWER: * Driving too fast for
conditions
* Lack of tread on the front tires
* Cargo improperly loaded
Driving at night is more dangerous because of the following (3): - 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
How often should you check your cargo (3)? - ANSWER: * Within 25 miles after
beginning a trip
* After you have driven for three hours
* After you take a break
An engine retarder is designed to: - ANSWER: Slow the vehicle down without
using brakes
When should tires be replaced (3)? - ANSWER: * When the tread separates
* When there are broken valve stems
* If the tread depth on your front tires is less than 4/32 deep