SOUTH CAROLINA CDL AIR BRAKES PRACTICE TEST
16.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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shifting into neutral may help slow the vehicle.
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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the parking brake should never used to slow the vehicle.
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All of the above.
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17.
The safety valve is usually set to open at:
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200 psi.
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150 psi.
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75 psi.
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100 psi.
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18.
To control your speed on a downgrade, you should:
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coast in neutral.
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use engine braking.
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fully apply the brakes.
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use controlled braking.
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19.
Radial and bias-ply tires:
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should be used together only when driving in packed snow.
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should not be used together.
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should be used together.
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should be used together only during bad weather.
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20.
If a load is 10 feet long, the minimum number of tie-downs required is:
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3
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4
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1
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2
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