DISTRICT OF COLUMBIA CDL DOUBLES TRIPLES PRACTICE TEST
11.
How should you brake if your vehicle loses ABS?
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Stay off the Brake
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Brake as you always have.
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Step on and off the brake pedal several times
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Pump the brake repeatedly
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12.
Which of the following is NOT a reason for hydraulic brake failure?
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Brake fade on long hills
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Loss of hydraulic pressure
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Stab braking
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All of the above.
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13.
Overloading a vehicle with cargo can have negative effects on all of the following except:
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Weight limits
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Braking
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Speed control
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Steering
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14.
When coupling double trailers, you can secure the second trailer by:
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chocking the wheels.
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using the trailer spring brakes.
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setting the trailer emergency brakes.
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All of the above.
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15.
For safety during a trip, you should:
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check critical items when you stop.
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watch gauges for signs of trouble.
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use your senses to check for problems.
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All of the above.
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16.
The center of gravity of a trailer should be:
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as high as possible.
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as low as possible.
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at the front of the trailer.
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at the rear of the trailer.
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17.
If your trucks has a high center of gravity, which of the following is true for curves?
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You should travel at the posted speed limit.
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Reduce your speed to a crawl.
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You should slow down, as your truck can roll over at the posted speed limit for the curve.
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None of the above.
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18.
Cargo should be properly covered:
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to protect people from spilled cargo.
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to block your view or someone else’s.
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to protect the weather from the cargo.
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All of the above.
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19.
No matter how small the cargo is, it should have at least:
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4 tie-downs.
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2 tie-downs.
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6 tie-downs.
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1 tie-down.
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20.
If you hear a loud loud "bang" and the steering feels "heavy", you should:
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hold the steering wheel firmly and stay off the brake.
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check your rearview mirrors to see if you have a flat tire.
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brake hard and pull off the road.
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pump the brakes until the vehicle has slowed down.
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