View instructions
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.
Most heavy-duty vehicles use:
|
solid brakes.
|
|
|
air brakes.
|
|
|
hydraulic brakes.
|
2.
Retarders:
|
reduce braking distance.
|
|
|
improve gas mileage.
|
|
|
help slow a vehicle, reducing the need for using brakes.
|
3.
When backing, it is best to:
|
try to back in the direction of the drift.
|
|
|
use a helper whenever possible.
|
|
|
use only the passenger's side mirror.
|
4.
The posted speed limit for a curve:
|
may be too fast for many trucks or buses.
|
|
|
is safe for trucks or buses, but it may be too fast for cars.
|
|
|
is safe for all vehicles.
|
5.
Which of the following is a reason to cover cargo?
|
To protect the cargo from weather
|
|
|
To protect people from spilled cargo
|
|
|
All of the above.
|
6.
If a load is 50 feet long, the minimum number of tie-downs required is:
|
10
|
|
|
4
|
|
|
5
|
7.
If your trucks has a high center of gravity, which of the following is true for curves?
|
You should slow down, as your truck can roll over at the posted speed limit for the curve.
|
|
|
Reduce your speed to a crawl.
|
|
|
You should travel at the posted speed limit.
|
8.
If you must drive slowly, how should you alert following drivers?
|
Use your emergency flashers if it is legal
|
|
|
Turn on your taillights
|
|
|
Flash your brake lights
|
9.
Too little weight on the driving axles can cause:
|
longer stopping distances.
|
|
|
poor traction.
|
|
|
mechanical damage.
|
10.
Combination vehicles have __ air lines.
|
1
|
|
|
2
|
|
|
3
|
Page 1 of 2
Next page
Grade this page