General Knowledge5 (Drivingtests.org)

What are some things you should do at an accident scene to prevent another accident?

Try to move your vehicle to the side of the road.
If you're stopping to help, park away from the accident.
Do both of these.

What are important reasons for performing a vehicle inspection?

A vehicle defect that is found during inspection and corrected can prevent problems later.
Federal and state regulations require you to inspect your vehicle.
Both of these are important reasons.

Which of these is NOT something you should do if your headlights are not working properly?

Clean the headlights.
Adjust the headlights.
Leave your high beams on.

Which of these statements about vehicle fires is true?

A burning tire should be cooled with water.
If the cargo or box trailer catches fire, open the doors as soon as you can.
If your engine is on fire, open the hood as soon as you can.

You should check the following for looseness, sticking, damage, or improper settings:

steering wheel and transmission controls.
accelerator, brakes, and clutch pedals.
Both of these need checked.

Serious traffic violations that can cause your CDL to be suspended include:

tailgating and reckless driving.
excessive speeding and erratic lane changes.
Both of these actions could cause a suspension.

Where or when should you test the stopping action of your service brakes?

When your vehicle is moving at about 5 mph.
At a special brake testing center only.
In the parking lot when your vehicle is not moving.

How can you avoid the effects that wet brakes can cause?

Slow down and place the transmission in low gear.
Gently apply the brakes, increase engine rpm, and cross the water while keeping light pressure on the brakes.
Do both of these.

On which fires can you use an A:B:C fire extinguisher?

Burning tires or cloth.
Electrical fires.
Can be used on both.

At a blood alcohol concentration (BAC) of ______, most people lose consciousness, and some die.

0.10%
0.40%
0.16%

You are checking your wheels and rims for a pre-trip inspection. Which of these statements is TRUE?

Cracked wheels or rims can be used if they have been welded.
A vehicle can be safely driven with one missing lug nut on a wheel.
Rust around lug nuts may mean that they are loose.

Which of the following materials can be used in an A:B:C fire extinguisher to put out all three classes of fires?

Water.
Carbon dioxide.
Dry chemical agent.

If you are involved in a collision but are not seriously injured, what must you do?

Protect the area and notify the authorities.
Care for the injured and collect required information.
Do both of the these.

You must drive on a slippery road. Which of these is a good thing to do in such a situation?

Apply the brakes during turns.
Use a smaller following distance.
Slow down gradually.

Whether or not you load or secure your cargo yourself, you are responsible for:

recognizing overloads and poorly balanced weight.
knowing that your cargo is securely tied down and covered.
both of these are correct.

Which of these tells you that cargo contains hazardous materials?

There is a four-inch, diamond-shaped hazardous materials label on the container.
A hazardous materials placard is on the vehicle.
Both of these answers are correct.

Which of these is NOT required knowledge for drivers needing a HazMat endorsement?

Basic chemistry.
When to use placards.
Which products can be loaded together

There are certain types of vehicle inspection, including:

general, maintenance, and physical.
post-trip, pre-trip, and en-route.
Both of these are correct.

Even if you don’t have a Hazardous Materials endorsement on your CDL, you can drive a vehicle hauling hazardous materials if:

the cargo will be transported less than 100 miles.
the vehicle does not require placards.
someone who has a Hazardous Materials endorsement rides with you.

You are checking your tires for a pre-trip inspection. Which of these statements is TRUE?

A tread depth of 2/32 inch is safe for the front tires.
Tires of mismatched sizes should not be used on the same vehicle.
Radial and bias-ply tires can be used together on the same vehicle.

Cargo that is not loaded or secured properly can cause which of the following problems?

Other road users can hit or be hit by loose cargo.
Loose cargo can injure the driver or passengers during a quick stop or crash.
Both of these are correct.

Loads that are over-length, over-width, or overweight may require:

flashing lights.
driving limited to certain times.
Both of these are correct.

Which of these statements is FALSE?

Your blood alcohol level (BAC) is determined by how fast you drink, how much you drink, and how much you weigh.
A drinker can control how fast his or her body absorbs and gets rid of alcohol.
Alcohol goes directly from the stomach to the blood stream.

You are driving a 40-foot vehicle at 50 mph. Driving conditions are ideal (dry pavement, good visibility).

What is the least amount of space that you should keep in front of your vehicle to be safe?

3 seconds.
4 seconds.
5 seconds.

Which of the following statements about backing is true?

Backing is always dangerous.
You should back and turn toward the driver's side whenever possible.
Both of these are correct.

Front-end header boards:

protect you from your cargo in case of collision.
block the forward movement of your cargo.
do both of these.

Your blood alcohol concentration (BAC) depends on your:

body weight.
age.
height.

When driving in work zones, you should:

Slow down.
Use your four-way flashers or brake lights to warn drivers behind you.
Do both of these.

The Commercial Driver License Manual suggests several things to do when you pass a vehicle. Which of these is NOT one of them?

At night, flash your lights from low to high beam and back.
Constantly blow your horn while passing the vehicle.
Assume the other driver does not see you.

Which of these statements about speed management are true?

On a wet road, you should reduce your speed by about one-third.
On packed snow, you should reduce your speed by about one-half.
Both of these statements are true.

Which of these is especially true about your tires in hot weather?

You should bleed a small amount of air to keep tire pressure steady.
You should check tire mounting and air pressure before driving.
If a tire is too hot to touch, you should hose it down with water.

Which of these will help keep an engine cool in hot weather?

Making sure the engine has the right amount of oil
Properly adjusted V-belts
Both of these are correct.

Which of these statements is true regarding the use of drugs while driving?

Prescription drugs are allowed as long as your doctor says the drugs will not affect safe driving ability.
No prescription or nonprescription drugs are allowed at any time for any reason.
"Speed" and other amphetamines are allowed as long as you are using the drugs to stay awake.

You are driving a vehicle that can be driven safely at 55 mph on an open road. Although the speed limit is 55 mph, traffic is heavy, moving at 35 mph.

The safest speed for your vehicle in this situation is:

40 mph.
45 mph.
35 mph.

When should you check your mirrors for a lane change?

Before and after signaling the lane change.
After starting and after completing the lane change.
Both of these are correct.

Which of these statements about drinking alcohol are true?

Alcohol first affects judgment and self-control, which are essential for safe driving.
Statistics show that drivers who have been drinking have a much greater chance of being in a crash.
Both of these are true.

You are checking your brakes and suspension system for a pre-trip inspection. What are you looking for?

Brake shoes must not be worn dangerously thin, missing, or broken.
Brake pads should not have oil, grease, or brake fluid on them.
You should check both of the these.

When getting in to start the engine and inspect inside the cab, you must:

start the engine and listen for unusual noises.
make sure the parking brake is on and put the gearshift in neutral (or park if automatic).
do both of these.

When you intend to turn, how should you use your turn signals?

Signal continuously up through the turn.
Signal well in advance of the turn.
Do both of theses.

Which of these is a good rule to follow when using a fire extinguisher?

Stay downwind of the fire.
Aim at the base of the fire.
Keep as close to the fire as possible.

Which of the following violations at railroad crossings can lead to loss of your CDL for at least 60 days?

Getting stuck on the tracks because of insufficient clearance.
Not having sufficient space to drive all the way through without stopping.
Both of these.

Which of these can cause a fire?

Underinflated tires.
Loose fuel connections.
Both of these.

Which of these items is NOT checked on a pre-trip inspection?

Cargo securement.
Whether all vehicle lights are working and clean.
Cab air conditioning.

Which of these statements about managing space to the sides is true?

Strong winds make it easy to stay in your lane.
Always keep your vehicle to the right side of your lane.
You should avoid traveling alongside other vehicles whenever possible.

Which of these can cause the vehicle to skid?

Overacceleration.
Not enough weight on the front axle.
Both of these.

You are driving a 40-foot vehicle at 35 mph. The road is dry and visibility is good. What is the least amount of space you should keep in front of your vehicle to be safe?

3 seconds
4 seconds
5 seconds

Name some suspension system defects.

Broken leaves in a leaf spring and a cracked or broken spring hanger.
Leaking shock absorbers.
Both of these.

Why should you be in the proper gear before starting down a hill?

You may not be able to shift into a lower gear once you are going down a hill.
You need to be in the same gear at the bottom of the hill.
The clutch is made to be used on even surfaces.

When crossing or entering traffic with a heavy vehicle, you should remember which of the following?

Since heavy vehicles are easy to see, you can count on other drivers to move out of your way or slow down for you.
The best way to cross traffic is to pull the vehicle partway across the road and block one lane while waiting for the other lane to clear.
Heavy vehicles need larger gaps in traffic than cars.

General Knowledge5 (Drivingtests.org)

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