🔗Pennsylvania Combination Vehicles — Question 13 of 20

If the spring brakes are not released when you pushed the trailer air supply valve you should:

Pennsylvania CDL Combination Vehicles Test Info

Questions on Exam

20

Passing Score

80%

Time Limit

Typically 30 minutes; varies by testing location

Age Requirements

Intrastate: 18+ · Interstate: 21+

Pennsylvania Department of Transportation (PennDOT)

Official CDL Portal

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