1.
The ________ brake system applies and releases the brakes when the driver uses the brake pedal during normal driving.
service
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parking
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emergency
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anti-lock
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2.
Most heavy-duty vehicles use:
pump-the-brake systems.
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triple air brake systems.
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dual air brake systems.
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single air brake systems.
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3.
When the wheels of a trailer lock up:
ABS will increase stopping power.
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the vehicle will gradually come to a complete stop.
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the trailer will tend to swing around.
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All of the above.
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4.
A tank endorsement is:
only required when transporting liquids.
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not required when transporting hazardous materials.
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required for both liquids and gases.
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only required when transporting gases.
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5.
When you apply the brakes, the brake shoes and linings are pushed against:
the supply pressure gauge.
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the safety relief valve.
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the S-cam.
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None of the above.
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6.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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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All of the above.
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7.
If you must make an emergency stop, you should:
apply the brakes as hard as you can to lock them.
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brake in a way that will keep your vehicle in a straight line.
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use the hand brake before the brake pedal.
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None of the above.
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8.
You are coming down a long, steep downgrade. Which of the following is a sign that your brakes may have started to fade?
You have to apply your brakes harder and harder to get the same stopping power.
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The brake pedal feels spongy or goes to the floor.
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The steering feels heavy.
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You hear a loud "bang".
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9.
When driving on long and/or steep downgrades, to select an appropriate safe speed you should consider:
the length of the grade.
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the total weight of the vehicle and cargo.
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the road conditions.
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All of the above.
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10.
Most heavy duty vehicles use ___ air brake systems for safety.
dual
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reduced
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triple
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single
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