🔗South Dakota Combination Vehicles — Question 13 of 20
If the spring brakes are not released when you pushed the trailer air supply valve you should:
South Dakota 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+
South Dakota DPS
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