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OREGON CDL PRACTICE TEST - GENERAL KNOWLEDGE

21. To prevent drowsiness before a trip, drivers should:
avoid scheduling trips for the middle of the night.
avoid medications that cause drowsiness.
get adequate sleep.
All of the above.
22. When driving a 60 foot truck at 35 mph in ideal conditions, you should keep at least _______ of space in front of you.
6 seconds
5 seconds
4 seconds
12 seconds
23. An empty truck requires _________ a full truck.
This is irrelevant.
a greater stopping distance than
less stopping distance than
the same stopping distance as
24. Service lines are often coded with the color ____ to keep from getting them mixed up with the emergency line.
red
yellow
blue
orange
25. The air storage tanks:
stop the compressor from pumping air.
are used to hold compressed air.
protects the tank and the rest of the system from too much pressure.
are connected to the engine through gears or a v-belt.
26. Driving dry bulk tanks requires special care. Why?
The load can shift.
They have a high center of gravity.
Their weight and size can make it more difficult to stop quickly.
All of the above.
27. You must use ________ as the principal way of controlling your speed on downgrades.
the brake pedal
the braking effect of the engine
"Maximum Safe Speed"
controlled braking
28. If your ABS malfunctions:
the parking brakes will not work.
you should immediately come to a complete stop.
the service brake will not work.
you still have normal brake functions.
29. The application pressure gauge:
protects the tank and the rest of the system from too much pressure.
tells you how much pressure is in the air tanks.
shows how much air pressure is being applied to the brakes.
stops the compressor from pumping air.
30. Which of the following can cause front-wheel skid?
Cargo loaded so not enough weight is on the front axle.
Lack of tread on the front tires.
Driving too fast for conditions.
All of the above.
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