TX CDL DOUBLES TRIPLES TEST - PRACTICE TEST
11.
Combination vehicles usually:
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are easier to drive than single than single CMVs.
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are shorter than single than single CMVs.
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require more driving skill than single CMVs.
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All of the above.
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12.
Emergency equipment is:
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only required when transporting hazardous materials.
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required.
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encouraged.
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optional.
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13.
When coupling double trailers, you can secure the second trailer by:
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setting the trailer emergency brakes.
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chocking the wheels.
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using the trailer spring brakes.
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All of the above.
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14.
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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15.
Which of the following is a good way to avoid becoming an aggressive driver?
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Avoid talking on your cell phone.
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Be realistic about your travel time.
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Keep your following distance reasonable.
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All of the above.
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16.
In your mirror, you see a car approaching from the rear. The next time you check your mirror, you don't see the car. If you wish to change lanes, you should:
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ease into the other lane slowly so the other car can get out of the way.
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wait until you are sure the car isn't in your blind spot.
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assume the car left the roadway and change lanes as normal.
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None of the above.
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17.
Doubles/triples are:
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easier to drive than other CMVs.
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usually faster than most CMVs.
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less stable than other CMVs.
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more stable than other CMVs.
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18.
If the engine catches fire, you should:
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turn off the engine as soon as you can.
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avoid shooting foam from the vehicle's underside.
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open the hood as soon as you can.
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pull into a service station and notify the emergency services.
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19.
While crossing railroad tracks, you should:
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not shift gears.
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shift up.
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stop, then look and listen for the train.
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shift down.
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20.
In vehicles with air brakes, the two markings on a front brake limiting valve are:
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normal and slippery.
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left and right.
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wet and dry.
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high and low.
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