Directions: All applicants who are applying for a Class A CDL should be prepared to take the Combination test. This test covers information found in Section 6 of the Oregon Commercial Driver Manual. Section 6 provides the information needed to safely operate tractor-trailers, doubles, triples, and straight trucks with trailers. The test is made up of 20 multiple-choice questions, and applicants will need to correctly answer a minimum of 16 questions to pass. The Combination test is not a replacement for the Double/Triple endorsement test.

A “crack-the-whip” effect, resulting in a rollover.
A trailer to straighten out.
Confusion over which lane the driver is hoping to use.
Other drivers to reduce their speed.

Are less likely to roll over than empty rigs.
Are more likely to roll over than empty rigs.
Are just as likely to roll over as empty rigs.
Should not be driven.

Turn on the air supply.
Apply the trailer emergency brakes.
Prevent a skid.
Accelerate the vehicle.

Oregon CDL Permit Test - Combination

Wait, before you go

Number of questions:	20
Passing score:	16

In the direction you want the trailer to move.
In the direction opposite of where you want the trailer to move.
To the left until backing is complete.

Rollovers.
Slippery roads.
Other drivers.

In the same way as they would be in a vehicle without ABS.
As the vehicle is placed in neutral.
With the hand brake.