CDL AIR BRAKES PRACTICE TEST - SOUTH DAKOTA
21.
Emergency brakes and parking brakes must be held on by:
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hydraulic pressure.
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air pressure.
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mechanical force.
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All of the above.
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22.
When the spring brakes are on, you should never:
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change lanes.
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decrease your speed.
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upshift.
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push the brake pedal down.
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23.
The ________ brake system applies and releases the brakes when the driver uses the brake pedal during normal driving.
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emergency
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anti-lock
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service
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parking
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24.
A tank endorsement is:
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required for both liquids and gases.
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only required when transporting gases.
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not required when transporting hazardous materials.
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only required when transporting liquids.
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25.
Before transporting sealed loads, you should check that:
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the load can be inspected.
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the seal numbers match the placard numbers.
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the load is properly secured.
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All of the above.
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