FREE SC CDL Combination Test - Practice Test 2024

1. Containerized loads:

should exceed gross weight and axle weight limits.
are generally used for freight carried part way by rail or ship.
must be inspected before and after the trip.
All of the above.

2. Headache racks:

protect you from being hit by your cargo.
can blind other drivers.
help you keep weights within legal limits.
None of the above.

3. If you are driving a 30 foot vehicle at 35 mph, you should leave at least _______ between your vehicle and the vehicle in front of you.

4. The emergency air line:

causes the tractor protection valve to close when the emergency line loses pressure.
supplies air to the trailer air tanks.
controls the emergency brakes on combination vehicles.
All of the above.

5. To reduce the chance of rollover, you should:

place the cargo as high as possible inside the trailer.
put the lightest parts of the cargo under the heaviest parts.
distributed the cargo as low as possible inside the trailer.
None of the above.

6. Before transporting sealed loads, you should check:

a small sample of whatever is inside.
the special transit permit.
that you don't exceed gross weight and axle weight limits.
None of the above.

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

8. If your ABS is not working:

it will slow your truck to a halt and force you to pull over.
you still have normal brake functions, and should drive and brake as you always have.
you should immediately bring your vehicle to a complete stop.
the drive wheels will begin to spin, and you should take your foot off the accelerator.

9. When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.

10. You are coupling a semi-trailer to your tractor but have not yet backed under. The trailer is at the right height when:

the end of the kingpin is even with the top of the fifth wheel.
it will be raised slightly when the tractor is backed under it.
the locking jaws are around the head of the kingpin.
None of the above.

SOUTH CAROLINA CDL COMBINATION PRACTICE TEST