LOUISIANA CDL AIR BRAKES PRACTICE TEST
16.
A low air pressure warning signal:
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is required on all vehicles without air brakes.
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is required on vehicles with air brakes.
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is optional on vehicles with air brakes.
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None of the above.
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17.
Before starting down a hill, you should:
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slow down and shift to a lower gear.
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apply the brakes hard.
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release the accelerator and shift to Neutral at the same time.
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look for an escape route.
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18.
In combination vehicles with air brakes, the trailer air supply control should pop out when the air pressure falls within the range of:
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100 to 120 psi
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20 to 45 psi
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10 to 20 psi
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50 to 75 psi
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19.
To control your speed on a downgrade, you should:
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use engine braking.
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coast in neutral.
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fully apply the brakes.
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use controlled braking.
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20.
An ABS system:
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keep your wheels from locking when you brake hard.
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gives you more control over the vehicle during braking.
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helps you avoid skids caused by over braking.
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All of the above.
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