CO CDL DOUBLES TRIPLES TEST - PRACTICE TEST
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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 Colorado doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The CO CDL doubles triples test covers the following sections of the Colorado CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this CO CDL practice test now to prepare for the actual test! Important: Triple trailers are not legal in Colorado.
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1.
To avoid becoming an aggressive driver you should:
make gestures to other drivers.
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give other drivers the benefit of the doubt.
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give other drivers your full attention.
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speed up if you think you’re going to be late.
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2.
Enough tread is especially important in winter conditions. You need at least ________ tread depth on steering axle tires.
2/8 inch
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4/32 inch
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6/24 inch
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8/32 inch
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3.
Before each trip, you must make sure:
your cargo obscures your view to the sides.
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the cargo is balanced and secured.
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the cargo has a high center of gravity.
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the truck is overloaded.
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4.
When checking the engine compartment in a vehicle inspection, you should check all of the following except:
Coolant level in radiator
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Engine oil level
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Windshield washer fluid level
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Shock absorbers
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5.
If a load is 10 feet long, the minimum number of tie-downs required is:
1
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3
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4
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2
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6.
Emergency equipment is:
required.
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only required when transporting hazardous materials.
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encouraged.
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optional.
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7.
You hear a loud "bang" which sounds like a tire blowout. You should:
inspect your tires with your mirrors.
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keep driving as normal.
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check the tires at the next stop.
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assume you
have a tire failure.
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8.
If a load is 50 feet long, the minimum number of tie-downs required is:
4
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3
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5
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10
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9.
If you are feeling sleepy, you should:
increase your speed to get to the destination quicker.
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slow down and drive on the shoulder of the road.
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pull off the road and rest or take a nap.
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None of the above.
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10.
If brakes fail on a long downgrade, you should:
set the parking brake.
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turn off the engine as soon as you.
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use an escape ramp if it is available.
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pump the brake pedal 3 times.
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CO Doubles Triples Test
Number of questions: | 20 |
Correct answers to pass: | 16 |
Passing score: | 80% |
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