CDL DOUBLES PRACTICE TEST ARKANSAS
11.
A low air pressure warning signal:
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is required on all vehicles without air brakes.
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is optional on vehicles with air brakes.
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is required on vehicles with air brakes.
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None of the above.
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12.
Watch out for black ice:
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right after it starts to rain.
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when it is snowing.
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when the temperature is above freezing and the road is dry.
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any time the temperature is below freezing and the road looks wet.
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13.
What should you do if you doubt you have safe space to pass under a low bridge?
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If no warnings are posted, assume there is enough clearance under the bridge and proceed slowly.
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Increase the weight of your vehicle to clearing under the bridge.
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Assume that the height posted at the bridges is correct.
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Go slowly, and take another route if you are not sure you can make it.
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14.
Which of the following is not a braking system on a truck?
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Emergency brake
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Parking brake
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Steering brake
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Service brake
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15.
You can release dolly brakes:
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by closing the emergency line valve.
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by closing the air tank petcock.
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by opening the air tank petcock.
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by opening the service line valve.
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16.
Dual tires:
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should always come in contact with each other.
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are dangerous.
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should not come in contact with each other.
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should come in contact with each other whenever possible.
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17.
The last trailer of triples is ______ as likely to turn over as a five-axle tractor.
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5 times
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twice
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4 times
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3.5 times
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18.
Drivers transporting cargo are responsible for:
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inspecting the cargo.
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recognizing overloads.
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making sure the cargo is properly secured.
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All of the above.
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19.
When going down a steep downgrade, you should primarily brake using:
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the parking brake.
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the emergency brake.
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the service brakes.
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the braking effect of the engine.
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20.
The posted speed for a curve that may be safe for a straight truck:
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can be ignored when driving a double or triple.
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is never safe for a double or triple.
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is likely to be safe for a double or triple.
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could be too fast for a double or triple.
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