CDL Doubles/Triples Test (2024) - FREE LA CDL Practice Test

1. An alcohol evaporator:

used to reduce the chance of the front wheels skidding.
protects the air brake system from too much pressure.
to hold compressed air.
is used to reduce the risk of ice in air brake valves and other parts during cold weather.

2. As you approach off ramps and on ramps, remember:

that the posted speed limit may not be safe for larger vehicles.
that downgrades make it easier to reduce speed.
to maintain your highway speed.
to always brake and turn at the same time.

3. You can determine if your vehicle is equipped with ABS (anti-lock braking system) by:

checking if your vehicle was manufactured after March 1, 1998.
looking for wheel speed sensor wires coming from the rear of your brakes.
checking for a yellow ABS malfunction lamp on the instrument panel.
All of the above.

4. The ABS malfunction lamp on the instrument panel is:

5. On dry pavement, the braking distance when traveling at 55 mph is about:

6. The tire load for each tire is stated:

on the tread of the tire.
on the vehicle's operator manual.
on the inside of the tire.
on the side of the tire.

7. If you must drive slowly, how should you alert following drivers?

Use your emergency flashers if it is legal
Flash your brake lights
Turn on your taillights
Help them out by signaling when it is safe to pass

8. The weight of a truck:

has an impact on stopping distance.
has no effect on stopping distance.
is not as important as the vehicle's center of gravity in determining stopping distance.
None of the above.

9. You must have at least _____ inch tread depth in every major groove on front tires.

10. Which of the following is NOT a reason for hydraulic brake failure?

CDL DOUBLES PRACTICE TEST LOUISIANA