FREE ND CDL Combination Test (2024)

1. When backing with a trailer, you should:

check your mirrors on both sides frequently.
make pull-ups to re-position your vehicle as needed.
look at your line of travel before you begin backing.
All of the above.

2. Most hydraulic brake failures occur for one of two reasons, one of which is:

excessive downshifting.
loss of hydraulic pressure.
driving in cold weather.
relying too much on the engine braking effect.

3. The best way to recognize that your trailer has started to skid is:

by hearing squeaking noises from the wheels.
by seeing it in your mirrors.
by using retarders.
None of the above.

4. When transporting cargo, drivers must inspect the securement of the cargo every:

5. When driving a 50 foot combination vehicle at 50 mph in ideal conditions, you should keep at least ____ seconds of space in front of you.

6. What factors can cause brakes to fail or fade?

Not relying on the engine braking effect
Brakes out of adjustment
Excessive use of the service brakes
All of the above.

7. If a load is 50 feet long, the minimum number of tie-downs required is:

8. When backing a trailer, if you turn the wheel left:

the cab will go right and the trailer will go left.
the cab will go left and the trailer will go right.
the cab and the trailer will go left.
the cab and the trailer will go right.

9. Whenever you back up with a trailer, position your vehicle so you can back in a straight line. If you must back on a curved path, back toward:

10. When you inspect the coupling, make sure there is ______ between the upper and lower fifth wheel.

ND CDL COMBINATION PRACTICE TEST