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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 Hawaii doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The HI CDL doubles triples test covers the following sections of the Hawaii CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this HI CDL practice test now to prepare for the actual test!
1. If you are being tailgated, you should:
make quick changes.
open up room in front of you.
increase your speed very gradually.
2. If an aggressive driver is involved in an accident down the road, you should:
stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
confront the aggressive driver.
try to get their vehicle to the side of the road.
3. As part of your vehicle inspection, you are checking that air flows to all trailers. After using the trailer handbrake to provide air to the service line, you go to the rear of the rig. When you open the emergency line shut-off valve at the rear of the last trailer, you should hear:
the service line valve close.
air escaping from the open valve.
a mechanical vibration.
4. Texting is:
about as safe as adjusting the radio.
the most dangerous distraction.
safer than talking on a cell phone.
5. During a walk around inspection of a combination vehicle, drivers should check that:
the glide plate is securely mounted to the trailer frame.
all locking pins are present and locked in place.
All of the above.
6. Most heavy trucks with manual transmissions require ____ to change gears.
double clutching
single clutching
triple clutching
7. When driving a 60-foot truck at 50 mph, your minimum following distance should be:
7 seconds
5 seconds
6 seconds
8. It is safer to drive over (rather than to avoid) which of the following?
Paper and cloth sacks
Cardboard boxes
None of the above.
9. How can you tell if a converter dollie has ABS?
There is a yellow lamp on the left side of the dolly.
There is an ABS plaque on the right side of the dolly.
There is a red lamp on the left side of the dolly.
10. What is the most important reason to inspect your vehicle?
Your safety and that of other road users.
Vehicle inspection is required by federal and state laws.
Saving money by preventing costly repairs.
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HI CDL Doubles Triples Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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