CDL General Knowledge Study Guide #5

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Escape ramps are: *

1 point

Used to stop runaway vehicles

Used to get out of a burning truck

For combination vehicles only

Which of these is NOT a good rule to follow when caring for injured at an accident scene? *

1 point

If a qualified person is helping them, stay out of the way unless asked to assist

Keep injured persons cool

Move severely injured persons if there is a danger due to passing traffic

If you need to leave the road in a traffic emergency, you should: *

1 point

Try to get all wheels off the pavement

Avoid braking until your speed has dropped to about 20mph

Tap repeatedly on the brakes

For your safety, when setting out reflective triangles you should: *

1 point

Carry the triangles at your side

Hold the triangles between yourself and oncoming traffic

Keep them out of sight while you walk to the spots where you set them out

How do you correct a rear-wheel acceleration skid? *

1 point

Apply more power to the wheels

Counter-steer the steering wheel

Stop accelerating

When looking ahead of your vehicle while driving you should look: *

1 point

To the right side of the road

As far as your peripheral vision can see

Back and forth, near and far

Heavy vehicles must sometimes travel more slowly than other traffic. Which of these is NOT a good rule to follow when you are driving such a vehicle? *

1 point

Signal other drivers when it is safe for them to pass you

Stay to the right

Turn on your flashers if it is legal to do so

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

1 point

Rust around lug nuts may mean that they are loose

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

Which of these statements about cold-weather driving is true? *

1 point

An engine cannot overheat when the weather is very cold

Windshield washer antifreeze should be used

Exhaust system leaks are less dangerous in cold weather

The most important reason for being alert to hazards is so: *

1 point

Accident reports will be accurate

Law enforcement personnel can be called

You will have time to plan your escape if the hazard becomes an emergency

Which of these statements about downshifting for a long downhill grade is true? *

1 point

It should not be done with an automatic transmission

It allows engine compression and friction to help slow the vehicle

The proper time to downshift is just after the vehicle starts down the hill

When should you wear seat belts? *

1 point

Anytime you are in a moving vehicle

Only in states where law requires it

Whenever you are hauling hazardous materials

Controlled braking: *

1 point

Can be used while you are turning sharply

Involves locking the wheels for short periods of time

Is used to keep a vehicle in a straight line when braking

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? *

1 point

3 seconds

4 seconds

5 seconds

You are driving a truck with a manual transmission. You have to stop the truck on the shoulder while driving on an uphill grade. Which of these is a good rule to follow when putting it back in motion up the grade? *

1 point

Keep the clutch slipping while slowly accelerating

Use the parking brake to hold the vehicle until the clutch engages

Let the vehicle roll straight backwards a few feet before you engage the clutch

Hydroplaning: *

1 point

Cannot occur when driving through a puddle

Only occurs at speeds above 50 mph

Is more likely if tire pressure is low

As the Blood Alcohol Concentration (BAC) goes up, what happens? *

1 point

The drinker more clearly sees how alcohol is affecting him/her

Judgment and self-control are affected

The drinker can sober up in less time

A vehicle is loaded with most of the weight on the steering axle. What may result? *

1 point

Hard steering and possible damage to the tires

Better handling

Too little traction on the steering axle

You do not have a Hazardous Materials Endorsement on your Commercial Driver's License. You are asked to deliver hazardous material in a placarded vehicle. You should: *

1 point

Refuse to haul the load

Take the placards off the vehicle

Haul the load, but only to the nearest place where a driver with a Hazardous Materials Endorsement can take over

Which of these is a good thing to do when steering to avoid a crash? *

1 point

Apply the brakes while turning

Steer with one hand so that you can turn the wheel more quickly

Do not turn any more than needed to clear what is in your way

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