FREE TN CDL Doubles Triples Practice Test (2024)

1. Excessive use of the service brakes results in overheating. Too much heat can:

cause the brakes to grab.
cause the brakes apply unevenly.
cause the brakes to squeak.
make the brakes stop working.

2. Emergency lines are often coded with the color ___ to keep from getting them mixed up with the service line.

3. Fully loaded rigs:

are less likely to roll over than empty rigs.
are much more likely to roll over than empty rigs.
are just as likely to roll over as empty rigs.
None of the above.

4. When driving a double or triple:

the more heavily loaded trailer should be in the rear.
the lighter trailer should be directly behind the tractor.
all trailers should have the same weight.
the more heavily loaded trailer should be directly behind the tractor.

5. When driving double and triple trailers, drivers should:

look far ahead.
allow more following distance.
steer gently and go slowly around corners.
All of the above.

6. After starting the engine, the ABS light stays on. This means:

the ABS is in Neutral.
the ABS oil level is not adequate.
the ABS is working properly.
the ABS is not working properly.

7. With a dual air brake system:

one system is the main braking system while the other is a back-up system.
each system shares the same lines and hoses.
each system has its own air tanks, hoses and lines.
each system shares air tanks.

8. Longer combination vehicles have the tendency to swing wide on turns. This is called:

9. Alcohol:

does not affect judgement.
improves muscle coordination.
improves reaction time.
impairs depth perception.

10. ABS helps you:

keep the wheels from locking up.
lock your wheels.
decrease your overall stopping distance.
decrease your average speed.

TENNESSEE DOUBLES TRIPLES PRACTICE CDL TEST