Nebraska CDL — General Knowledge: Handling Emergencies Practice Test

Question 1

On the manual's class-of-fire chart, how are Class D fires in combustible metals extinguished?

Accepted Answer

With specialized extinguishing powders — Class D covers combustible metals, and the chart calls for specialized extinguishing powders.

Answer

With water

Answer

With foam only

Answer

By smothering with a tarp

Question 2

At an accident, a qualified person is already helping the injured. What should you do?

Accepted Answer

Stay out of the way unless you are asked to assist — When someone qualified is giving help, the manual says to keep clear unless your assistance is requested.

Answer

Take over the first aid

Answer

Move the injured to the roadside

Answer

Leave the scene right away

Question 3

Where on a downgrade are escape ramps usually located?

Accepted Answer

A few miles from the top — The manual says ramps are usually found a few miles below the top of the grade and that signs announce them.

Answer

At the very bottom

Answer

Only at the top

Answer

At every curve

Question 4

After a brake failure on a downgrade, why does the manual say to make your move as soon as you know the brakes don't work?

Accepted Answer

Waiting lets the vehicle pick up speed, which makes stopping harder — Every moment of delay means more speed, and a faster vehicle is harder to bring to a stop.

Answer

Escape routes close after a few minutes

Answer

The engine will soon overheat

Answer

Other drivers will block the way

Question 5

How does the manual say to stop heavy bleeding at an accident scene?

Accepted Answer

Apply direct pressure to the wound — The manual's simple steps for helping the injured include controlling heavy bleeding with direct pressure and keeping the person warm.

Answer

Raise the person's feet

Answer

Give the person water

Answer

Move the person to your cab

Question 6

You are in an accident and have a cell phone or CB. When does the manual say to call for assistance?

Accepted Answer

Before you get out of your vehicle — With a phone or CB at hand, the call comes first, before leaving the vehicle. Without one, you protect the scene and then send for the police.

Answer

After setting out all your triangles

Answer

Once the other driver agrees

Answer

Only after reaching the next town

Question 7

When may a CMV driver use a hand-held mobile telephone despite the federal restriction?

Accepted Answer

When necessary to communicate with law enforcement or other emergency services — The rule has an emergency exception for contacting law enforcement officials or other emergency services.

Answer

When stopped at a red light

Answer

When the call is from the dispatcher

Answer

When traffic is light

Question 8

Why does the manual say not to use water on a gasoline fire?

Accepted Answer

Water will spread the flames — Water spreads burning gasoline. The shock risk is the reason water is ruled out for electrical fires.

Answer

Water freezes on contact

Answer

Water conducts electricity

Answer

Water damages the paint

Question 9

What can the failure of a rear tire cause, and what usually prevents it?

Accepted Answer

Fishtailing; dual rear tires usually prevent it — A failed rear tire can make the vehicle slide back and forth, but the manual says dual rear tires usually keep that from happening.

Answer

Heavy steering; power steering prevents it

Answer

A loud horn sound; nothing prevents it

Answer

Brake fade; retarders prevent it

Question 10

Your engine catches fire. What does the manual say to do with the engine?

Accepted Answer

Turn it off as soon as you can — To keep an engine fire from spreading, the engine is shut off as soon as possible and the hood is kept closed if that can be avoided.

Answer

Rev it to blow the fire out

Answer

Leave it idling so the fan runs

Answer

Open the hood to let it cool

Question 11

Why does emergency braking not mean pushing the brake pedal down as hard as you can?

Accepted Answer

That keeps the wheels locked and causes a skid — Jamming the pedal holds the wheels locked, and a vehicle with skidding wheels cannot be controlled.

Answer

That overheats the engine

Answer

That wears out the pedal

Answer

That drains the air tanks

Question 12

You have knocked down a fire and no longer see smoke or flame. What does the manual say?

Accepted Answer

Keep going until whatever was burning has cooled, because the fire can restart — No visible smoke or flame is not proof that a fire is finished. The manual says to continue until the burned material has been cooled.

Answer

The fire is out and you can drive on

Answer

Open the cargo doors to check

Answer

Remove the burned material by hand

Nebraska CDL — General Knowledge: Handling Emergencies practice test

Study questions with answers

1. On the manual's class-of-fire chart, how are Class D fires in combustible metals extinguished?

2. At an accident, a qualified person is already helping the injured. What should you do?

3. Where on a downgrade are escape ramps usually located?

4. After a brake failure on a downgrade, why does the manual say to make your move as soon as you know the brakes don't work?

5. How does the manual say to stop heavy bleeding at an accident scene?

6. You are in an accident and have a cell phone or CB. When does the manual say to call for assistance?

7. When may a CMV driver use a hand-held mobile telephone despite the federal restriction?

8. Why does the manual say not to use water on a gasoline fire?

9. What can the failure of a rear tire cause, and what usually prevents it?

10. Your engine catches fire. What does the manual say to do with the engine?

11. Why does emergency braking not mean pushing the brake pedal down as hard as you can?

12. You have knocked down a fire and no longer see smoke or flame. What does the manual say?

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