GENERAL KNOWLEDGE CDL TEST IOWA - PRACTICE TEST
41.
Most hydraulic brake failures occur for one of two reasons, one of which is:
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relying too much on the engine braking effect.
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excessive downshifting.
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loss of hydraulic pressure.
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42.
If there is a fire and you are not sure what to use to put it out, you should:
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use water.
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use a fire extinguisher.
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wait for firefighters.
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43.
If a worker is close to the roadway in a work zone, you should:
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drive at the posted speed limit.
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pull off the road and stop.
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reduce your speed below the posted speed limit.
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44.
To make sure you always have overhead clearance, you must be aware that ________ may have reduced the clearances since the heights were posted.
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packed snow
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the weight of the cargo
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water on the road
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45.
The distance your vehicle travels, in ideal conditions, from the time you see a hazard until your brain recognizes it, is called:
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Perception distance
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Stopping distance
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Reaction distance
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46.
Which of the following is a tip to follow so you won't become a distracted driver?
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Turn on all communication devices.
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Engage in complex conversations with others.
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None of the above.
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47.
If you doubt you have enough space to pass under a bridge, you should:
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drive faster.
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go slowly.
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turn on your headlights.
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48.
Backing is dangerous because:
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you have to turn the steering wheel toward the direction you want to go.
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you cannot see everything behind your vehicle.
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cargo may fall out.
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49.
You should be aware that many car drivers closely follow large vehicles especially:
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on the highway.
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in the city.
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in bad weather.
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50.
The one-way check valve:
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supplies air to the trailer air tanks.
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keeps your wheels from locking up when you brake hard.
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keeps air from going out if the air compressor develops a leak.
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