Utah CDL DMV Endorsement Tank 1

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1. A trolley valve:

Should be used while driving.

Should only be used to test trailer brakes.

Should be used when parking uphill.

The trailer hand valve (also referred to as the trolley valve or Johnson bar) is a mechanism that works the trailer brakes. It should only be used to test the brakes. Using it while the vehicle is being driven could cause a skid. Never use the trailer hand valve while parking because doing so may release the air pressure from the braking system, releasing the brakes that are holding the vehicle in place.

2. Belts in the engine compartment should be:

Frayed.

Tight.

Greasy.

Easy to slide off.

When inspecting your vehicle's engine, check the belts for tightness and excessive wear. The amount of "give" that is safe for each belt in a given engine will vary, so learn what is appropriate for your vehicle.

3. When backing with a trailer:

You should not back up in a straight line.

You should not correct drift until you are very far off course.

You should pull up to reposition the vehicle as needed.

You should avoid braking.

When backing with a trailer, you should pull up to reposition your vehicle as needed.

4. When carrying Division 1.1, 1.2, or 1.3 explosives, your vehicle should not be:

Parked within 300 feet of a bridge.

Parked within 40 feet of the road.

Driven in rain or snow.

Except when parking briefly to perform necessary functions for vehicle operation (such as refueling), never park a vehicle carrying Division 1.1, 1.2, or 1.3 explosives within 300 feet of a bridge, tunnel, or building. Never park such a vehicle within five feet of the traveled portion of the road.

5. Stopping distance can be affected by:

Speed.

Engine oil.

Time of day.

Traffic.

Factors that can affect stopping distance include your vehicle's speed, its weight, and the traction provided by the road surface.

6. While driving:

Creating a text is not permitted, but reading a text is.

Creating a text is permitted, but reading a text is not.

Neither creating nor reading a text is permitted.

Texting while driving a CMV is prohibited. "Texting" is defined as manually entering text into, or reading text from, an electronic device.

7. If the brakes “pull” to one side or the other when you use them, it's a sign that:

The brakes are working properly.

The brakes need to be checked.

The brakes are new.

The brakes have too much stopping power.

If your vehicle "pulls" to one side when braking, you may have brake trouble. If there is an issue with your brakes, you should fix the issue before driving. Operating an unsafe vehicle is against federal and state laws.

8. To help prevent a rollover, cargo should be:

Placed as high as possible inside a trailer.

Placed as low as possible inside a trailer.

Placed on the driver’s side of a trailer.

If a vehicle is top-heavy, it is more likely to roll over. The weight of cargo should be positioned as low in a trailer as possible to minimize this risk.

9. If unsure if a trailer is equipped with ABS, you can:

Check under the trailer for wheel speed sensors coming from the back of the brakes.

Try driving on a slippery surface and see if ABS kicks in.

Assume it does have ABS.

Remove a tire and look for the ABS sensor on the axle.

Trailers and converter dollies built on or after March 1, 1998 are required to have Anti-Lock Braking Systems (ABS). This will be indicated by the presence of a yellow malfunction lamp. You can determine if older trailers have ABS by checking under the trailers for ECU and wheel speed sensor wires coming from the back of the brakes.

10. Liquid surge occurs in:

Overfilled tanks.

Partially-filled tanks.

Tanks that have not been used for a period of time.

Surge results from the movement of liquid in tanks that are partially filled.

11. A Class 1 hazardous material is:

An explosive.

Solid.

Corrosive.

Explosives are placed in hazardous materials Class 1.

12. An exhaust system should be:

Loose.

Leaking.

Fastened securely.

When inspecting an exhaust system, you should verify that parts of the system are not loose, broken, or missing. The system's parts must be properly mounted and should not be rubbing against moving parts of the vehicle.

13. A steering wheel should be held:

With both hands.

With one hand, keeping the other hand free for other tasks.

With one hand at a time, alternating between hands.

At the base of the wheel.

A steering wheel should be held firmly with both hands, positioned on opposite sides of the wheel.

14. If a leak is suspected in a cargo of radioactive material:

The driver should go to the local fire department.

The driver should pick up any loose pieces of the radioactive material.

The driver should continue to carry the cargo, as long as they avoid touching the affected areas.

The driver should not operate the vehicle until it has been cleaned.

If you are transporting radioactive material and believe there is a leak or broken package in your cargo, you should tell your dispatcher or supervisor as quickly as possible. Do not touch or inhale the material. Do not use the vehicle until it has been cleaned or checked with a survey meter.

15. To use the controlled braking method, you should:

Lock your wheels while braking.

Apply your brakes as firmly as possible without locking the wheels.

Slightly tap the brakes.

Controlled braking is the method of applying a vehicle's brakes as hard as possible without locking the wheels. A driver should keep steering wheel movements very small if braking while using this method.

16. The most important reason to do a pre-trip inspection is that it helps ensure safety.

True

False

The most important reason to inspect your vehicle before a trip is to ensure the safety of yourself and others on the road.

17. Roads are especially slippery when it first begins to rain because:

Water is always very slippery.

The fresh rain mixes with oil on the roadway.

The water has nowhere to go.

Roads are particularly slippery when it first begins to rain. The water mixes with oil drippings on the road that have not yet washed away, creating a slippery and dangerous mixture.

18. A sign indicating a maximum safe speed:

Is suggesting a driving speed, but vehicles may travel faster than the posted speed.

Is suggesting a speed limit to be followed only by vehicles weighing more than 26,000 pounds.

Should be followed and no vehicle should travel faster than the posted speed.

Is only applicable to automobiles.

You should never exceed the speed shown on a "Maximum Safe Speed" sign.

19. Tires of mismatched sizes:

Can be used only on a front axle.

Can be used only on a trailer's axles.

Should be corrected before driving.

Improve fuel economy.

Tires on the same vehicle should all be equally sized. Ensure your tires are not mismatched when inspecting your vehicle.

20. With your low beam headlights turned on, you should be able to see about ____ ahead of your vehicle.

15 feet

75 feet

100 feet

250 feet

Low beam headlights allow you to see about 250 feet ahead of your vehicle. When driving at night, adjust your speed so that you will be able to stop in the distance illuminated by your headlights.

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