CDL Doubles Triples Practice Test (2024) - FREE New Mexico CDL Test

1. For safety during a trip, you should:

watch gauges for signs of trouble.
check critical items when you stop.
All of the above.

2. How can you tell if a converter dollie has ABS?

There is a yellow lamp on the left side of the dolly.
There is a red lamp on the left side of the dolly.
There is an ABS plaque on the right side of the dolly.

3. If your vehicle thumps or vibrates heavily, it may be a sign that:

4. Which of the following is a common cause of truck fires?

Short circuits due to loose connections.
Under-inflated tires and duals that touch.
All of the above.

5. Many large vehicles have convex (curved, "spot, "fisheye") mirrors. Convex mirrors:

make things look smaller and farther away than they really are.
are illegal in most states.
misrepresent reality by showing a larger area than flat mirrors.

6. When you turn suddenly while pulling doubles, which trailer is most likely to turn over?

The front trailer is twice as likely to turn over as the tractor.
All trailers are equally likely to turn over.
The rear trailer is twice as likely to turn over as the tractor.

7. Too little weight on the driving axles can cause:

8. When connecting to the rear trailer, the trailer height should be:

higher than the center of the fifth-wheel.
lower than the center of the fifth-wheel.
the same height as the fifth-wheel.

9. Pre-trip inspections of doubles and triples should:

take less time than inspecting straight trucks.
be done by the shipper.
take more time than inspecting straight trucks.

10. An ABS system:

requires a change in the way you brake.
helps increase a vehicle's stopping power.
is a safety anti-skid braking system.

NM CDL DOUBLES TRIPLES TEST - PRACTICE TEST