๐Ÿ›žWisconsin Air Brakes โ€” Question 10 of 20

If your truck has a properly functioning dual air brake system and minimum size air tanks, the air pressure should build up from 85 to 100 psi within how many seconds?

Wisconsin CDL Air Brakes Test Info

Questions on Exam

25

Passing Score

80%

Time Limit

Typically 30 minutes; varies by testing location

Age Requirements

Intrastate: 18+ ยท Interstate: 21+

Wisconsin DMV

Official CDL Portal

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