New Mexico CDL DMV Endorsement Double 2

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1. If a truck is equipped, a trailer brake hand valve can be used to:

Add fuel to the truck.

Prevent the truck from rolling back when being started from a stop.

Check the engine oil level.

If a tractor-trailer is so equipped, the trailer brake hand valve can be used to stop the vehicle from rolling back when being started from a stop.

2. After a tire has been changed, the driver should stop after a short distance to:

Check the tightness of the lug nuts.

Ensure that the tire has remained clean.

Inflate the new tire.

After changing a tire, you should stop a short distance later to recheck the tightness of the tire's lug nuts.

3. If the brakes pull to one side or the other when used:

They are working properly.

They need to be checked.

They will be the most effective.

If the brakes pull to one side or the other when used, it is an indication of brake trouble.

4. When driving on packed snow, you should reduce your speed by:

One-half or more.

About one-third.

About one-quarter.

Reduce your speed when traveling on surfaces that provide reduced traction. Reduce your speed by one-half or more when traveling on packed snow.

5. To make it easier to leave a parked position, you should park:

In a way that allows you to back up when exiting.

In a way that allows you to pull forward when exiting.

Only on the side of roadways, not in parking lots.

Backing is always dangerous and should be avoided whenever possible. When parking, look to park in a space that will allow you to pull forward when exiting.

6. Once cargo is secured onto a vehicle:

You do not need to inspect the cargo.

You should not let others inspect the cargo.

You should check the cargo every 150 miles.

The securement of cargo must be checked before beginning a trip, within the first 50 miles of a trip, and then again every three hours or 150 miles thereafter.

7. During an inspection, slack adjusters on S-cam brakes should not move more than:

One foot.

One centimeter.

One inch.

Check each slack adjuster after parking on level ground, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.

8. A tread depth of ____ should be in every major groove of a tire that is not in the front of a commercial motor vehicle.

1/32 of an inch

2/32 of an inch

4/32 of an inch

For safe operation, a commercial motor vehicle needs a tread depth of 4/32 of an inch in every major groove on the front tires, and a tread depth of 2/32 of an inch on other tires.

9. Air brakes use ____ to function.

Compressed air

Liquid nitrogen

Carbon dioxide

The brakes in an air brake system use compressed air to function properly.

10. The air storage tanks:

Hold only enough air for one braking cycle.

Hold enough air for the brakes to be used several times if the compressor stops working.

Do not hold air unless there is an emergency.

The air storage tanks in an air brake system store compressed air to be used for braking. They hold enough air for the brakes to still be used several times if the compressor stops working.

11. In a vehicle with dual parking control valves, a separate air tank can be used:

To make the air brakes work more effectively.

To temporarily release the spring brakes.

To charge the brakes on the rear trailer.

In a vehicle with dual parking control valves, there is a separate air tank that can be used to temporarily release the spring brakes if they have been activated due to low air pressure. Pushing in the proper control will release the spring brakes for a short period of time, allowing the driver to move the vehicle in an emergency.

12. In very hot weather, tires should be checked regularly because:

They may melt.

Air pressure may increase with the temperature.

The tread wears down more quickly than in cooler weather.

Because air pressure increases with temperature, you should pay special attention to the tire mounting and pressure when traveling in hot weather.

13. All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS).

1943

1998

2009

All trailers and converter dollies manufactured on or after March 1, 1998 must have Anti-Lock Braking Systems (ABS).

14. The leading factor resulting in death and injury in work zones is:

Speeding.

Stopping.

Under-inflated tires.

The leading cause of injury and death in roadway work zones is excessive speed by passing drivers. Lower your speed when driving through a work zone.

15. The tire load for a tire is stated:

On the side of the tire.

On the inside of the tire.

On the inside of the driver’s door.

The tire load, or the maximum safe weight that a tire can carry at a given pressure, is stated on the side of each tire.

16. If approaching a vehicle with a distracted driver, you should:

Quickly pass the vehicle.

Maintain a safe distance from the vehicle.

Closely follow the vehicle.

If you see a distracted driver, give them plenty of space and maintain a safe following distance.

17. Rims with welding repairs:

Are not safe to use.

Are acceptable to be used on tires in the rear of the vehicle.

Are acceptable to be used if carrying a light load.

Wheels or rims with welding repairs are never safe to use.

18. Be sure that your wheel bearing/seals are:

Not leaking.

Shiny.

Rusted.

During an inspection, ensure that the wheel bearing/seals are not leaking.

19. Looking far ahead of your vehicle while driving is:

Discouraged, as there is little you can do about something far up the road.

Encouraged to help you identify hazards as early as possible.

Not permitted.

Good drivers look down the road at least 12 to 15 seconds ahead of their vehicles. This makes it possible to identify hazards early, when drivers are more likely to have time to respond appropriately.

20. When driving, knowing what is happening behind you is:

Rarely important.

Important.

Distracting.

To travel safely, it is essential that you know what is happening on all sides of your vehicle at all times. Use your mirrors frequently to help you remain aware of your surroundings.

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