CDL PRACTICE TEST - GENERAL KNOWLEDGE (ILLINOIS)
21.
Most hydraulic brake failures occur for one of two reasons, one of which is:
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relying too much on the engine braking effect.
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loss of hydraulic pressure.
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excessive downshifting.
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driving in cold weather.
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22.
Drivers should use their horn when needed, however they must be aware that using the horn:
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consumes the battery.
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is prohibited on interstate highways.
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damages your hearing.
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can startle other drivers.
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23.
Commercial vehicle drivers using GPS devices for assistance with routing and navigation should employ a device:
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with a built-in voice assistant.
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designed specifically for truck navigation.
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with a screen larger than 6 inches.
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with touch control.
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24.
During a pre-trip inspection, to check your lights you should:
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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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with the engine running, turn on the headlights and 4-way emergency flashers, and get out of the vehicle.
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with the engine running, put the vehicle in a forward gear and turn on the headlights.
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25.
An Anti-lock Braking System (ABS):
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always shortens your stopping distance.
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keeps your wheels from locking up when you brake hard.
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lets you drive faster.
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increases your normal braking capability.
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26.
Under-loaded front axles can:
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cause poor traction.
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make the steering axle weight too light to steer safely.
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cause the drive wheels to spin easily.
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All of the above.
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27.
After starting the engine the coolant temperature should:
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rise gradually.
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slowly decrease.
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rise quickly.
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hold steady.
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28.
Antilock brakes:
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decrease your stopping distance.
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let you drive faster.
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help you stop faster.
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None of the above.
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29.
When using a fire extinguisher, you should stay:
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at least 10 feet away from the fire.
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at whatever distance you think is safe.
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as far away from the fire as possible.
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as close to the fire as possible, without getting burnt.
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30.
An anti-lock braking system (ABS):
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should help you steer around an obstacle while braking.
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helps you avoid wheel lock up.
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helps you avoid skids caused by over braking.
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All of the above.
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