CDL PRACTICE TEST (WY) - GENERAL KNOWLEDGE TEST
11.
The most common cause of skidding is:
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spilled oil.
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surface water.
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driving too fast for conditions.
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black ice.
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12.
If a vehicle is equipped with ABS, when you start the engine:
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the ABS indicator light on the dash should come on and then turn off.
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the trailer emergency brakes will come on.
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the wheels will lock up.
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the spring brakes will come on.
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13.
You are inspecting your vehicle during a trip. What should you do?
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Watch gauges for signs of trouble.
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Check critical items such as tires, brakes, and lights.
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Use your senses to check for problems.
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All of the above.
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14.
Which of the following are possible causes of tire fires?
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Under-inflated tires and dual tires that touch.
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Improperly loaded cargo and dual tires that touch.
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Over-inflated tires and short circuits.
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Loose fuel connections or under-inflated tires.
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15.
To prevent drowsiness before a trip, drivers should:
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get adequate sleep.
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avoid medications that cause drowsiness.
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avoid scheduling trips for the middle of the night.
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All of the above.
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16.
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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17.
Drivers should adjust their mirrors:
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after driving.
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before driving.
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while driving.
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None of the above.
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18.
To control your speed on a downgrade, you should:
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fully apply the brakes.
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use controlled braking.
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use engine braking.
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coast in neutral.
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19.
There are two ways of knowing when to shift up:
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Weather conditions and road speed.
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Engine speed and road speed
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Engine speed and weather conditions.
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Automatic transmissions and shift indicator light.
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20.
During a trip you need to inspect the cargo and its securing devices:
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every 3 hours or 150 miles.
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within the first 50 miles after beginning a trip.
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after every break you take.
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All of the above.
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