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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 Michigan doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The MI CDL doubles triples test covers the following sections of the Michigan CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this MI CDL practice test now to prepare for the actual test!
1. If a load is 10 feet long, the minimum number of tie-downs required is:
2. When driving a double or triple:
the more heavily loaded trailer should be in the rear.
the more heavily loaded trailer should be directly behind the tractor.
all trailers should have the same weight.
3. Another name for front-end header boards is:
headache racks.
head belt.
containerized racks.
4. Air brakes use ________ to make the brakes work.
compressed air
compressed gas cylinders
compressed gases
5. During freezing weather, which area is most likely to be slippery after it rains?
Shaded areas.
All of the above.
6. If you are feeling sleepy, you should:
increase your speed to get to the destination quicker.
pull off the road and rest or take a nap.
slow down and drive on the shoulder of the road.
7. When inspecting the coupling, make sure the fifth-wheel jaws have closed around the:
head of the kingpin.
the electrical cord.
shank of the kingpin.
8. With an engine fire, you should NOT:
turn the engine off as soon as possible.
open the hood.
shoot foam from the vehicle’s underside.
9. Your vehicle should be equipped with all of the following except:
Spare electrical fuses
Instructions on how to perform a vehicle inspection test
Warning devices for parked vehicles
10. When you see you will need to slow down, you can warn drivers behind you by:
slamming on the brakes.
tapping the brakes a few times.
turning on the right turn signal.
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MI CDL Doubles Triples Test

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