CDL GENERAL KNOWLEDGE TEST (OK) - PRACTICE TEST
31.
Which of the following is a common cause of fire?
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Under-inflated tires and duals that touch.
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Short circuits due to loose connections.
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All of the above.
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32.
Road surfaces where water collects can create conditions that cause a vehicle to hydroplane. Which of the following is an indication of standing water?
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Clear reflections
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Tire splashes
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All of the above.
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33.
The one-way check valve:
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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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supplies air to the trailer air tanks.
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34.
Which of the following statements about using turn signals is true?
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You should use your turn signals when your vehicle is parked at the side of the road.
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To keep others from trying to pass you, you should signal just before you turn.
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None of the above.
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35.
To keep the engine cool in hot weather, you should:
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check v-belt tightness by pressing on the belts.
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make sure there is enough engine oil.
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All of the above.
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36.
You may get a clue that a driver may be going to make a turn from:
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the driver's head and body movements.
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slow moving or stalled traffic in a traffic lane.
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the rear lights of the driver's vehicle.
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37.
ABS brakes help you:
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lock up the wheels in an emergency stop.
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avoid wheel lock up.
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downshift before starting down a hill.
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38.
During a pre-trip inspection, to check your lights you should:
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with the engine running, put the vehicle in a forward gear and turn on the headlights.
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turn off the engine, turn on the headlights and 4-way emergency flashers, and get out of the vehicle.
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check the yellow malfunction lamps on the instrument panel.
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39.
The use of brakes on a steep downgrade is:
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the main braking factor.
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a supplement to the braking effect of the engine.
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much more effective than the engine braking effect.
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40.
Convex mirrors:
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make objects appear larger than they really are.
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make things appear closer than they really are.
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show a wider area than flat mirrors.
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