Air Brakes Practice Test - Mississippi
11.
The low air pressure warning light is usually:
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red.
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orange.
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blue.
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yellow.
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12.
A tank endorsement is:
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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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only required when transporting liquids.
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13.
When driving on long and/or steep downgrades, to select an appropriate safe speed you should consider:
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the total weight of the vehicle and cargo.
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the road conditions.
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the length of the grade.
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All of the above.
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14.
The safety valve installed in the first tank the air compressor pumps air is set to open:
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if there is too much pressure.
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if there is too little pressure.
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at 30 psi.
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every 15 minutes.
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15.
Vehicles with air brakes require more stopping distance than vehicles with hydraulic brakes. Why?
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When driving vehicles with air brakes, the average perception distance increases from 400 feet to 2200 feet.
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It takes one half second or more for the air to flow through the lines to the brakes.
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Stopping distance for vehicles with air brakes is made up of six different factors.
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Air brakes use different brake drums.
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