FREE Nevada CDL Doubles & Triples Practice Test (2024)

1. Enough tread is especially important in winter conditions. You need at least ________ tread depth on steering axle tires.

2. Before each trip, you must make sure:

the cargo is balanced and secured.
the cargo has a high center of gravity.
the truck is overloaded.
your cargo obscures your view to the sides.

3. In a dual air brake system, if one air system is very low on pressure:

either the front or rear brakes will not be operating fully.
the effect won't be noticeable for the first 50 miles.
you should pump the brakes to restore pressure.
you should drive and brake as you always have.

4. When checking the engine compartment in a vehicle inspection, you should check all of the following except:

Shock absorbers
Engine oil level
Windshield washer fluid level
Coolant level in radiator

5. When conducting a pre-trip inspection:

you should review the last vehicle inspection report.
the inspection report should only be reviewed if you will be carrying passengers.
the vehicle inspection report should not be reviewed unless your supervisor tells you to do so.
None of the above.

6. If brakes fail on a long downgrade, you should:

use an escape ramp if it is available.
turn off the engine as soon as you.
pump the brake pedal 3 times.
set the parking brake.

7. A low air pressure warning signal:

is required on all vehicles without air brakes.
is required on vehicles with air brakes.
is optional on vehicles with air brakes.
None of the above.

8. Another name for front-end header boards is:

9. The tractor protection valve:

keeps air in the tractor brake system should the trailer break away or develop a bad leak.
works the trailer brakes.
supplies air to the trailer air tanks.
controls the emergency brakes on combination vehicles.

10. When driving in hot weather, drivers should inspect tires:

CDL DOUBLES TRIPLES PRACTICE TEST NEVADA