COMBINATION PRACTICE TEST - OR CDL
11.
When driving a combination vehicle, which of the following 2 things will help you prevent a rollover?
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Keeping the cargo near the ground and driving slowly around turns.
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Keeping cargo near the ground and driving slowly on the highway.
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Keeping cargo near the center of the vehicle and driving slowly on the highway.
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Keeping cargo near the center of the vehicle and driving slowly on turns.
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12.
When approaching a stopped bus, you must be aware that:
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passing a stopped bus is illegal.
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passengers crossing in front of the bus can always see you.
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passengers may cross in front of or behind the bus.
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a student may be driving the bus.
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13.
After starting the engine, the ABS light stays on. This means:
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the ABS is working properly.
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the ABS oil level is not adequate.
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the ABS is in Neutral.
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the ABS is not working properly.
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14.
A red triangle with an orange center means:
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Law enforcement vehicle
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The vehicle is hauling hazardous materials
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Liquid tanker
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Slow-moving vehicle
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15.
The best way to recognize that your trailer has started to skid is:
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by feeling the brakes come on.
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by opening the window and feeling the front of the mirror.
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by seeing it in your mirrors.
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by recognizing tire failure.
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16.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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the parking brake should never used to slow the vehicle.
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shifting into neutral may help slow the vehicle.
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All of the above.
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17.
When inspecting the coupling, make sure ________ between the upper and the lower fifth-wheel.
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there is at least 1 foot
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there is no space
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there are 10 feet
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there are at least 36 inches
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18.
When driving in a construction zone, if a construction worker is near the road, you should:
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maintain a constant speed.
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speed up.
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come to a complete stop.
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further reduce your speed.
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19.
If you smell exhaust fumes in the cab, you should:
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wait for the next stop, then inspect your vehicle.
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open the windows.
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remember to conduct a post-trip inspection.
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stop immediately.
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20.
If the spring brakes do not release when you push the trailer air supply control, you should:
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rev or
lug the engine.
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check the electrical cables.
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check the air line connections.
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pump the brakes.
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