MD CDL PRACTICE TEST - GENERAL KNOWLEDGE
41.
Hydroplaning:
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can occur at speeds as low as 30 mph.
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can occur only if there is a lot of water on the road.
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is less likely if tire pressure is low.
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can occur at speeds as low as 10 mph, if there is a lot of water.
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42.
When possible, you should park:
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on the shoulder.
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so you will have to back up when you leave.
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so you will be able to pull forward when you leave.
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on the roadway.
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43.
The spring brakes come on:
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when you bring the vehicle to a complete stop right away.
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when you lose ABS control.
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when air pressure in both air brake systems rises to a value set by the manufacturer.
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when main air pressure is lost.
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44.
Serious traffic violations include:
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erratic lane changes.
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excessive speeding.
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driving a CMV without obtaining a CDL.
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All of the above.
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45.
Drivers who cannot see others are
a dangerous hazard. Be especially alert for all of the following, except:
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Pick-up trucks
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Loaded station wagons
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Vehicles with frosted windows
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Rental trucks
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46.
Livestock:
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should never be carried on a trailer.
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should always be placed in the rear of the trailer.
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should never be kept bunched together.
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can move around in a trailer and cause unsafe handling.
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47.
On a level surface:
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you should use wheel chocks to hold the vehicle.
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should never be used if the brakes are very wet.
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wheel chocks make it easier for the vehicle to roll.
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wheel chocks should not be used when the brakes are very hot.
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48.
If you are traveling at 55 mph in a 30 foot vehicle, how many seconds of following distance should you have?
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5 seconds
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4 seconds
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3 seconds
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2 seconds
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49.
When driving in construction areas you should:
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stop driving as soon as you can safely do so.
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increase your speed.
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decrease your speed.
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reduce speed to a crawl.
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50.
The definition of Gross Vehicle Weight is:
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Total weight of a single vehicle + cargo
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Total weight of a single vehicle minus fuel
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Axle weight + cargo weight
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Total weight of cargo
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