FREE SC CDL Doubles/Triples Test 2024 (Practice Test)

1. At dawn, dusk, in rain or snow, to make yourself easier to see you should:

2. Doubles and triples:

have a lower chance of skidding.
can be turned suddently due to the low center of gravity.
can't be turned suddenly.
can be stopped suddenly due to their weight.

3. When driving a 50-foot truck at 40 mph, your minimum following distance should be:

4. It may not be safe to operate at legal maximum weights:

on highways.
on two-way streets.
in hot weather.
during bad weather or in mountains.

5. When preparing to make a right turn, you should NOT turn wide to the left as you start the turn. Why?

It makes the turn harder.
A following driver may try to pass you on the left.
A following driver may try to pass you on the right.
Turning wide to the left can cause your vehicle to tilt.

6. If the fifth-wheel locking lever is not locked after the jaws close around the kingpin:

the parking brakes are on and the wheels are chocked.
the parking brakes are on and your vehicle is safe to drive.
the coupling is not right and you should not drive until you get it fixed.
cargo is properly blocked.

7. Most heavy duty vehicles use ___ air brake systems for safety.

8. Which of the following statements about backing heavy vehicles is true?

The helper should stand where you cannot see the helper.
Always back as quickly as possible.
Back to the right side so that you can see better.
You should avoid backing whenever you can.

9. You are driving a double. Before entering traffic, you should:

make sure you have a large enough gap before entering or crossing traffic.
assume there is enough room to merge into traffic.
turn on your headlights.
always come to a complete stop.

10. Overloading a vehicle with cargo can have negative effects on all of the following except:

DOUBLES TRIPLES TEST SC - CDL PRACTICE TEST