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North Carolina Class C Knowledge Test Practice
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Passing target: 80% (24/30)
Vehicle Safety, Documents & TowingStandalone practice
How often should you check the air pressure in your tires, and when is the best time to check it?
Correct answer: At least once a month, when the tires are cool
Why
Correct pressure helps your steering, braking and fuel economy. Tires with too much air grip the road less and wear heavily in the middle of the tread. A tire is unsafe when its cord shows, when it has tread separation, or when its tread is less than 1/16 inch deep.
Verified against North Carolina Driver Handbook · Tires · p. 69, 68
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