AIR BRAKES PRACTICE TEST - FLORIDA
16.
The safety relief valve is located:
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in the front brake.
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on each end of the vehicle's axles.
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on the dashboard.
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in the first tank the air compressor pumps air to.
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17.
When checking air brakes on combination vehicles, which of the following is NOT part of checking that air flows to all trailers?
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Pulling tractor forward until the fifth-wheel comes out from under the trailer.
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Going to the rear of the rig.
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Using the trailer handbrake to provide air to the service line.
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Opening the emergency line shut-off valve at the rear of the last trailer.
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18.
Excessive use of the service brakes results in overheating. Too much heat can:
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cause the brakes to grab.
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cause the brakes to squeak.
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make the brakes stop working.
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cause the brakes apply unevenly.
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19.
If stopped on a hill, how can you start moving without rolling back?
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Release the parking brake before you have applied enough engine power to keep from rolling back.
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Partly engage the clutch before you take your right foot off the brake, put on the parking brake if necessary.
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Press on the gas pedal, even if you have to roll back a little.
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None of the above.
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20.
The air storage tanks:
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are used to hold compressed air.
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stop the compressor from pumping air.
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protects the tank and the rest of the system from too much pressure.
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are connected to the engine through gears or a v-belt.
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