CDL GENERAL KNOWLEDGE TEST (IOWA) - PRACTICE TEST
31.
Parking brakes are:
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required on all vehicles.
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not required on trailers.
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not required on commercial vehicles with air brakes.
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32.
__________ will help a drinker sober up.
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Only time
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Coffee and a little fresh air
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Only coffee
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33.
When only the tractor has ABS:
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the brakes won't work as effectively as without ABS.
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there is less chance of jackknifing.
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there is an increased chance of jackknifing.
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34.
When your rear wheels lock up, you may:
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lose steering control.
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gain better control of the vehicle.
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skid, jackknife, or spin
the vehicle.
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35.
When signaling what you intend to do, you should:
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cancel your signal after you have turned.
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signal continuously.
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All of the above.
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36.
When transporting a load, the cargo should be inspected:
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only after driving.
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by a helper.
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after every break you take during your trip.
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37.
Which of these statements is true?
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Radial and bias-ply tires should not be used together on the same vehicle.
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A tread depth of 2/32 of an inch is safe for steering axle tires.
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Dual tires that come in contact with each other provide better traction.
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38.
If the safety relief valve in the air brake system releases air:
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something is wrong.
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this will supply more power to the brakes.
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the valve is fully operational.
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39.
Containerized loads are used:
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when the cargo exceeds the weight limit.
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when the cargo has been or will be carried by rail or ship.
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when transporting liquids.
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40.
Who is responsible for making sure the lights and reflectors are clean?
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The driver
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The shipper
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The previous driver
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