DOUBLES TRIPLES TEST LA - CDL PRACTICE TEST
11.
Dollies with ABS are required to have a malfunction lamp:
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on the rear.
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on the front.
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on the left side.
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on the right side.
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12.
Which of these describes the proper braking technique when driving on a long and steep downgrade?
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Release the brakes until your speed is 5 mph above your safe speed, then apply the brakes. When your speed has decreased to your safe speed, repeat the previous steps.
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Apply the brakes until your speed has been reduced to 5 mph, then release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
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Apply the brakes. When your speed has been reduced to 5 mph below your safe speed, release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
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All of the above.
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13.
The tractor protection valve:
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prevents the trailer from being accidentally released.
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keeps air from going out if the air compressor develops a leak.
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keeps air in the brake system should the trailer develop a bad leak.
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keeps your wheels from locking up when you brake hard.
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14.
To prevent rollover, you should do all of the following except:
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drive slowly around turns.
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avoid quick lane changes.
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keep the load centered on your rig.
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put the lightest parts of the cargo under the heaviest parts.
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15.
Drivers transporting cargo are responsible for:
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recognizing overloads.
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making sure the cargo is properly secured.
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inspecting the cargo.
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All of the above.
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16.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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You may not notice a major leak in the service line until you try to put the brakes on.
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if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
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None of the above.
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17.
With an engine fire, you should:
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turn the engine off as soon as possible.
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not shoot foam from the vehicle’s underside.
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open the hood as soon as possible.
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All of the above.
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18.
Strong winds can make it difficult to stay in your lane, especially when:
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going into tunnels.
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driving at speeds below 40 mph.
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coming out of tunnels.
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driving alongside other vehicles.
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19.
Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
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less; more
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greater; less
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greater; more
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less; less
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20.
Watch out for black ice:
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right after it starts to rain.
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any time the temperature is below freezing and the road looks wet.
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when the temperature is above freezing and the road is dry.
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when it is snowing.
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