Air buildup requirements

Discussion in 'Trucking Schools and CDL Training Forum' started by Woodchuck88, Sep 20, 2021.

  1. Woodchuck88

    Woodchuck88 Medium Load Member

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    My girlfriend is taking her road test next week. Was wondering if you only have to show the examiner the 85 to 100 psi in 45 seconds at operating engine speed or also the 50 to 90psi at idle speed in 3 minutes? As far as I know that’s only for old trucks, but have heard of people failing for not doing it also. Also should she check the cut in and cut out before or after the static brake check? Things have changed big time since I’ve been through it, thanks!!
     
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  3. Wasted Thyme

    Wasted Thyme Road Train Member

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    Have her ask her instructor. It varies by state.
     
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