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Question:

When parking a combination vehicle, when should you use the hand valve?

A Never.
explanation

Never use the hand valve for parking because all the air might leak out, unlocking the brakes (in trailers that don’t have spring brakes). Always use the parking brakes when parking. [California Commercial Driver Handbook]

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Comments

Alkam 2126

4 years ago

It a great app to study for your CDL tests

Cbow33

4 years ago

Great app

Livvy2u

4 years ago

Mom

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