CDL General Knowledge: Safe Driving Rules
Master the safe driving rules tested on the CDL General Knowledge exam with these 35 targeted flashcards. Topics include speed management, space management, hazard perception, and communication techniques essential for commercial vehicle operators. Perfect for first-time CDL applicants and drivers seeking to reinforce their knowledge of federal and industry safety standards.
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Preview Questions
Question 1
What is the minimum following distance in seconds a CDL driver should maintain when traveling at speeds under 40 mph?
Answer
At least one second for every 10 feet of vehicle length. For a 40-foot vehicle, that is 4 seconds minimum.
Question 2
How much additional following distance should a CDL driver add when traveling above 40 mph?
Answer
Add one additional second to the base following distance. For example, a 40-foot truck needs 5 seconds instead of 4 seconds above 40 mph.
Question 3
What is meant by 'hydroplaning' and at what speed can it begin to occur?
Answer
Hydroplaning occurs when tires ride on a film of water instead of the road surface, reducing traction to near zero. It can begin at speeds as low as 30 mph on wet roads.
Question 4
What is 'speed matching' and why is it important for CDL drivers on highways?
Answer
Speed matching means driving at the same speed as surrounding traffic when safe to do so. Vehicles moving slower or faster than traffic flow create greater crash risk.
Question 5
When driving on a slippery road, how should a CDL driver adjust their following distance?
Answer
Following distance should be increased to at least double the normal distance on slippery surfaces to allow for extended stopping distances.
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