South Dakota CDL DMV Endorsement Double 1

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1. If there is ice on the front of your side mirror:

You should exit the roadway.

You can expect ice to be on the roadway.

There will not be ice on the roadway.

If your mirrors or wiper blades become icy while you are driving, you can expect the road surface to be icy as well.

2. Why should the steps of a pre-trip inspection be done in the same order each time?

You will be less likely to forget a step.

You will get faster.

It is required by law.

The form must be followed in order.

Doing an inspection the same way every time will help you learn the necessary steps. You will be less likely to forget a step if you get into a routine.

3. When should the trailer hand valve be used?

Only when the trailer is carrying a load

Only to test the trailer’s brakes

Only in inclement weather when the trailer may skid

The trailer hand valve, also called the trolley valve or Johnson bar, is used to work the trailer brakes. It should be used only to test the brakes. Using it while a vehicle is in motion could cause a skid.

4. When near a railroad crossing:

You should expect to hear every approaching train.

You may not hear a train, even if one is approaching.

You will hear two short blasts of a train's horn if a train is approaching.

You should never assume that you will hear an approaching train. The train operator may fail to sound the horn, or the use of a train's horn may be prohibited in a specific area. Even if the train does sound its horn, noise from inside your own vehicle may prevent you from hearing the train until it is dangerously close.

5. When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:

Stop harder than you would in a vehicle not equipped with ABS.

Use extra braking force to ensure the ABS kicks in.

Brake as you would in a vehicle not equipped with ABS.

Brake with less force than you would in a vehicle not equipped with ABS.

When driving a tractor-trailer combination that is equipped with an Anti-Lock Braking System (ABS), you should brake in the same manner that you would if the vehicle was not equipped with ABS.

6. When driving in fog, you should:

Use your horn.

Use the low beam lights.

Use the high beam lights.

Use the heater.

If you must drive in fog, you should use your low beam headlights and fog lights to maximize your visibility. Using high beam lights will only make it more difficult for you to see.

7. When inspecting the exhaust system, which of the following should not cause concern?

Loose or broken exhaust pipes

Loose or broken mounting brackets

Leaking exhaust system parts

Exhaust system parts that are not rubbing against fuel system parts

When inspecting a vehicle's exhaust system, be alert to a number of potential problems, including loose, broken, or missing exhaust pipes, mufflers, tailpipes, or vertical stacks; loose, broken, or missing mounting brackets, clamps, bolts, or nuts; exhaust system parts rubbing against fuel system parts, tires, or other moving parts of the vehicle; and exhaust system parts that are leaking.

8. If approaching a railroad crossing that is being approached by a train, you should:

Try to cross the tracks quickly.

Drive around any lowered gates.

Stop and wait for the train to pass before beginning across the tracks.

Never attempt to beat a train to a railroad crossing. It is very difficult to accurately judge the speed of an approaching train. If you come upon a crossing that is being approached by a train, you must stop and wait for the train to pass before you attempt to cross the tracks.

9. When driving, how can you maintain alertness?

Keep cool by using the air conditioner or opening a window.

Eat a lot of heavy foods.

Avoid stopping.

Strategies to avoid becoming fatigued while driving include keeping the cab cool inside by using the air conditioner or opening a window; avoiding heavy foods; and taking rest breaks about every two hours or 100 miles.

10. When starting an engine, warning lights and buzzers should:

Turn on and stay on.

Flicker occasionally.

Turn off right away.

After starting a vehicle's engine, the warning lights and buzzers for oil, coolant, charging circuits, and the Anti-Lock Braking System (ABS) should go out right away.

11. What do the two systems of a dual air brake system share?

Hoses

An air compressor

Air tanks

Both systems in a dual air brake systems share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.

12. The safety belt should:

Not be adjustable.

Latch securely.

Be frayed.

When inspecting your vehicle, you should verify that the safety belt is securely mounted, adjusts, latches properly, and is not ripped or frayed.

13. The driver of a commercial motor vehicle:

Can use any cell phone while driving.

Can only use a hands-free mobile phone while driving.

Can only use a cell phone on rural roads.

Can use a cell phone at night.

It is prohibited for CMV drivers to use hand-held mobile phones while driving.

14. To release a dolly's spring brakes before positioning the converter dolly for coupling, you should:

Use the dolly parking brake control.

Remove the air tank petcock.

Raise the dolly support.

Remove the pintle hook.

If a converter dolly has spring brakes, you can release the brakes by using the dolly parking brake control. Releasing the dolly's brakes is the first step you should take when properly positioning the dolly in front of the rear trailer.

15. Air lines should be securely connected to:

The fifth wheel.

The proper glad hands.

The kingpin.

The pintle hook.

When inspecting the convertor dolly, ensure that all components are present and in proper working condition. The air lines should be securely attached to the proper glad hands and should not contain any leaks. They should be attached with enough slack to allow for easy turning.

16. Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:

An extra set of brakes.

Voice-activated brakes.

Cruise control.

Anti-Lock Braking Systems (ABS).

Truck tractors with air brakes that were manufactured on or after March 1, 1997 are required to be equipped with Anti-Lock Braking Systems (ABS). ABS is required in any other type of vehicle with air brakes that was manufactured on or after March 1, 1998.

17. When approaching a railroad crossing, you should:

Increase your speed to get across the tracks as quickly as possible.

Roll your window down to listen for a train.

Rely on traffic control signals.

Never try to outdrive an approaching train.

Reduce your speed as you approach a railroad crossing. Remember that you will not necessarily be able to hear a train, and don't assume that signals will warn you of its approach. Never try to outdrive an approaching train at a railroad crossing.

18. To prevent a vehicle from rolling backward when beginning to move forward from a stopped position, you should:

Turn off the engine.

Partly engage the clutch.

Apply the emergency brake.

To prevent a vehicle with manual transmission from rolling backward when you begin to move forward from a stopped position, you can partly engage the clutch before removing your foot from the brake pedal.

19. Fully-loaded rigs:

Are less likely to roll over than empty rigs.

Are more likely to roll over than empty rigs.

Are just as likely to roll over as empty rigs.

Should not be driven.

Because the weight of cargo gives them a higher center of gravity, fully-loaded rigs are 10 times more likely to roll over in a crash than empty rigs.

20. Rollovers happen when:

You drive too slowly.

You are stopped.

You take a turn too fast.

Rollovers are caused by operators turning too fast. To avoid rolling over, drive slowly on entrance ramps, on exit ramps, and around corners. Avoid making quick lane changes when towing trailers.

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