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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Missouri CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Missouri CDL Manual. Take this practice test now to prepare for the actual MO CDL combination test!
1. Do not use the trailer hand valve in driving because:
the trailer emergency brakes will come on.
of the danger of making the trailer skid.
All of the above.
2. When a vehicle goes around a corner, the rear wheels:
follow a different path than the front wheels.
will turn freely.
follow the same path as the front wheels.
3. What is a pull up when referring to truck driving?
A driving maneuver used to pull your vehicle over to the side of the road and stop.
When a driver stops and pulls forward to get a better position.
A specific maneuver used to decelerate smoothly in the exit lane.
4. Who is responsible for inspecting the cargo?
The driver
The person who loaded and secured the cargo
The shipper
5. If during vehicle inspection a tire is too hot to touch, you should:
remain stopped until the tire cools off.
immediately decrease air pressure.
let air out.
6. Emergency lines on combination vehicles are often coded with the color ____ to keep from getting them mixed up with the ____ service line.
red; blue
yellow; black
blue; red
7. Most heavy trucks with manual transmissions require ____ to change gears.
triple clutching
single clutching
double clutching
8. What is a tractor jackknife?
When the wheels of a trailer lock up, and the trailer swings around.
When a drive-wheel skid lets the trailer push the towing vehicle sideways.
None of the above.
9. When you use your mirrors while driving on the road, you should:
only use the driver's side mirror.
avoid checking them regularly.
check them quickly.
10. The tire load rating is stated:
on each axle.
on the side of each tire.
inside the suspension system.
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MO CDL Combination 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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