COLORADO CDL DOUBLES TRIPLES PRACTICE TEST
11.
Too little weight on the driving axles can cause:
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mechanical damage.
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poor traction.
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longer stopping distances.
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poor visibility.
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12.
Which of the following is not a sign of fatigue?
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Keeping a steady speed
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Yawning repeatedly
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Frequent blinking
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Rubbing eyes
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13.
Air brakes use ________ to make the brakes work.
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compressed oil
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compressed gases
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compressed gas cylinders
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compressed air
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14.
What is true about tire chains?
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You should learn how to put the chains on before you need to do it in snow.
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You should watch the official video tutorial by the manifacturer before putting them on.
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You must carry the at least 6 chains and extra cross-links.
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All of the above.
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15.
To know how much space you should keep in front of you:
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wait until the vehicle ahead of you passes a clear landmark, then count off the seconds until you reach the same spot.
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estimate how many seconds it would take you to reach the vehicle ahead.
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estimate how many vehicle lengths there are between you and the vehicle ahead.
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None of the above.
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16.
When more than one semitrailer is behind the tractor:
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the lighter trailer should be in the rear.
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The order doesn't matter.
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the more heavily loaded trailer should be disconnected.
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the more heavily loaded semitrailer should be in the rear.
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17.
An alcohol evaporator:
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used to reduce the chance of the front wheels skidding.
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is used to reduce the risk of ice in air brake valves and other parts during cold weather.
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protects the air brake system from too much pressure.
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to hold compressed air.
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18.
An ABS system:
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helps increase a vehicle's stopping power.
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is a safety anti-skid braking system.
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decreases your stopping distance.
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requires a change in the way you brake.
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19.
Doubles and triples are:
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more stable than straight trucks.
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less likely to turn over than other combination vehicles.
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more likely to turn over than other combination vehicles because of the "crack-the-whip" effect.
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easier to drive than other combination vehicles.
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20.
Retarders:
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apply their
braking power whenever
you push on the accelerator.
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help prevent accidents by applying extra braking power to the non-drive wheels.
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help slow a vehicle and reduce brake wear.
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All of the above.
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