CDL DOUBLES TRIPLES PRACTICE TEST CALIFORNIA
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Safely pulling double and triple trailers requires knowledge and skill. If you want to pull double or triple trailers, you must add the Doubles/Triples (T) endorsement to your Class A CDL. The California doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The CA CDL doubles triples test covers the following sections of the California CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this CA CDL practice test now to prepare for the actual test!
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1.
If you are caught in strong winds, you should:
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keep a strong grip on the steering wheel and slow down or pull off the roadway.
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immediately take your foot off the accelerator.
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speed up while keeping a strong grip on the steering wheel.
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2.
To know how much space you should keep in front of you:
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estimate how many vehicle lengths there are between you and the vehicle ahead.
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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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3.
In newer vehicles with air brakes, you put on the parking brake:
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placing the transmission in Park.
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using a P-shaped, yellow control knob.
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using a diamond-shaped, yellow, push-pull control knob.
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4.
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. 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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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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5.
By pushing the trailer air supply control knob in, you:
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shut the air off and put on the trailer emergency brakes.
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supply the trailer with air.
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supply the tires with air.
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6.
To know how much space you should keep in front of you when driving at speeds below 40 mph, one good rule says you need at least ______ for each ______ of vehicle length.
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1 second; 10 feet
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1 second; 5 feet
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2 seconds; 10 feet
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7.
When backing, you should:
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avoid using the mirrors.
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back quickly.
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use a helper if possible.
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8.
Excessive use of the service brakes results in overheating. Too much heat can:
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make the brakes stop working.
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cause the brakes to grab.
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cause the brakes apply unevenly.
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9.
In vehicles with air brakes, the air compressor governor:
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controls how much air the air compressor will pump into the air storage tanks.
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controls when the air storage tanks will pump air into the air compressor.
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controls when the air compressor will pump air into the air storage tanks.
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10.
A bridge formula permits:
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less maximum axle weight for axles that are far apart.
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more maximum axle weight for axles that are closer together.
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less maximum axle weight for axles that are close together.
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CA CDL Doubles Triples Test
| Number of questions: | 20 |
| Correct answers to pass: | 16 |
| Passing score: | 80% |
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