Question 107 of 140

As part of the pre-trip air brake check, what should you do to test that the parking brake actually holds the vehicle?

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Rely solely on the dashboard warning light with no physical test
Test it only after the vehicle has already been driven for several miles
Only check that the parking brake knob is pulled out, without applying it to see if it actually holds
Set the parking brake, then gently try to move the vehicle forward in a low gear to confirm it holds

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Correct answer to question 107 (Air Brakes): Set the parking brake, then gently try to move the vehicle forward in a low gear to confirm it holds

Why

Gently trying to pull against the set parking brake confirms it actually holds the vehicle, rather than relying only on a visual check of the control or the dashboard light.

Updated: November 2026

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As part of the pre-trip air brake check, what should you do to test that the parking brake actually holds the vehicle?

Why

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