GENERAL KNOWLEDGE CDL TEST SOUTH CAROLINA - PRACTICE TEST
41.
When driving at night, you should dim your lights within ______ of an oncoming vehicle.
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500 feet.
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300 feet.
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250 feet.
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400 feet.
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42.
When backing a truck you should:
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look straight ahead.
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get out and walk around the vehicle before you begin to back.
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always rely on your mirrors.
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back and turn toward the right side.
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43.
If your brakes get wet, it can cause them:
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to grab.
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to apply unevenly.
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to be weak.
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All of the above.
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44.
Most heavy-duty vehicles use:
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solid brakes.
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hydraulic brakes.
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pressure brakes.
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air brakes.
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45.
The Johnson bar is a valve that:
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keeps air from going out if the air compressor develops a leak.
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works the trailer brakes.
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is installed in the first tank the air compressor pumps air to.
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reduces the braking pressure to a safe level.
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46.
Axle weight is:
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the weight transmitted to the ground by one axle or one set of axles.
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the weight of all the axles added together.
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the maximum safe weight your tires can carry at a specified pressure.
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the value specified by the manufacturer as the loaded weight of one axle.
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47.
Retarders:
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reduce the need for using your brakes.
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reduce brake wear.
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help slow a vehicle.
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All of the above.
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48.
What plays a major role in mountain driving?
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Rain
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Gravity
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Weather
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Speed
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49.
To maintain alertness while driving, you should:
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protect yourself from glare with sunglasses.
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keep the cab warm.
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rely on caffeine.
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take periodic breaks – about every 250 miles.
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50.
Suspension system defects include:
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cracked or broken spring hangers.
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steering wheel play of more than 10 degrees.
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rust around wheel nuts.
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All of the above.
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