CDL DOUBLES TRIPLES PRACTICE TEST OHIO
11.
If the safety relief valve in the air brake system releases air:
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this will supply more power to the brakes.
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something is wrong.
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the valve is fully operational.
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12.
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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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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shifting into neutral may help slow the vehicle.
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13.
Which of the following is NOT correct? Anti-lock brakes:
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give drivers more control over the vehicle during braking.
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require drivers to apply the brakes as hard as they can without locking the wheels.
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help drivers avoid skids caused by over braking.
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14.
What is true about tire chains?
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You should learn how to put the chains on before you need to do it in snow.
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You should watch the official video tutorial by the manifacturer before putting them on.
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You must carry the at least 6 chains and extra cross-links.
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15.
You can determine if your vehicle is equipped with ABS (anti-lock braking system) by:
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checking for a yellow ABS malfunction lamp on the instrument panel.
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checking if your vehicle was manufactured after March 1, 1998.
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All of the above.
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16.
Pre-trip inspections are:
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required by law
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required only for trips of more than 50 miles.
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recommended.
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17.
When your vehicle starts to skid, you must take action to:
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restore traction to the tires.
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use controlled braking.
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accelerate and countersteer.
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18.
With an engine fire, you should:
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turn the engine off as soon as possible.
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not shoot foam from the vehicle’s underside.
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open the hood as soon as possible.
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19.
If brakes fail on a long downgrade, you should:
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pump the brake pedal 3 times.
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use an escape ramp if it is available.
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turn off the engine as soon as you.
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20.
The last trailer of triples is ______ as likely to turn over as a five-axle tractor.
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4 times
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3.5 times
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twice
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