CDL General Knowledge Practice Test

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

How long should the mud flaps on a truck and trailer be?

Long enough to reach within 8 in of the roadway

If you're driving in town, how far will your recommended 12-15 second planning ahead measure in distance?

about a single block

A bridge formula restricts the axle weight for axles which...

are closer together

How soon should oil pressure rise to a normal level after starting the engine?

within seconds Signup and view all the answers

If starting from a standstill on a hill, what's the best way to get moving?

partly engage the clutch before you take your right foot off the brake Signup and view all the answers

Driving on a highway, it is recommended that you monitor a quarter of a mile ahead. At highway speeds, this equates to...?

12-15 sec Signup and view all the answers

Descending a long downgrade, which of these will help you if you have brake difficulties? (Select all that apply)

Escape ramp Signup and view all the answers

If you are tested and found to have a blood alcohol concentration below 0.04% but above 0.0, what will happen?

You will be taken out of service for 24 hrs Signup and view all the answers

Federal, State, and local regulations concerning cargo weight, securement, and cover vary widely. Which should you obey?

all of them Signup and view all the answers

What are two of the most common causes of tire fires?

Under-inflation and duals that touch Signup and view all the answers

The minimum number of tiedowns on a load is...?

2 Signup and view all the answers

If your load protrudes more than 4 feet beyond the rear of your vehicle, which of these do you need in Texas? (Select all that apply)

A red flag at least 12X12 in (day) Signup and view all the answers

If an accident victim is bleeding heavily, what should you do to help?

apply direct pressure to the wound Signup and view all the answers

If there is an obstacle in the road and you have a choice of directions around it, why should you choose to go right?

it will avoid driving into oncoming traffic Signup and view all the answers

How can you avoid temporary night blindness from other drivers' lights?

look at the sidelines instead Signup and view all the answers

If you have to stop on a divided highway, how should you place your warning triangles?

At 10ft, 100ft and 200ft, all facing approaching traffic Signup and view all the answers

How should you position your trailer to check the alignment of your mirrors?

straight with your cab Signup and view all the answers

If backing with a tractor trailer, turning the wheel left will do what?

turn the cab left and the trailer right Signup and view all the answers

If you have to stop on an undivided road, how should you set out your emergency warning triangles?

One front and one rear, and one nearer the vehicle toward traffic in the same lane Signup and view all the answers

If a railroad crossing has a steep approach/exit, what should you be very aware of?

you could get hung up on the track Signup and view all the answers

When descending a hill in the state of Texas, what is it unlawful for you to do?

to coast down the hill Signup and view all the answers

If you hit a thick fog bank, what's the best thing to do?

stop in a safe space and wait for it to pass Signup and view all the answers

If you have a B:C type fire extinguisher, what is it suitable for dealing with?

electrical fires and burning liquids Signup and view all the answers

What should you be aware of when passing a motorcycle?

that your vehicle can throw a motorcycle off course Signup and view all the answers

How many different states' Commercial Driver's Licenses can you hold simultaneously?

One Signup and view all the answers

If a road has been recently repaved, what can that mean for you going through an underpass?

the clearance height may be lower than it was previously Signup and view all the answers

What is the greatest weight allowed for any vehicle or combination of vehicles, plus load, in the state of Texas?

80,000 lbs Signup and view all the answers

If you have a convex mirror (e.g., 'fisheye,' 'spot,' 'bugeye'), what should you allow for?

the objects may appear smaller and further away than they really are Signup and view all the answers

Which of the following are you not allowed to transport on public highways in Texas in an open truck? (Select all that apply)

Gravel Signup and view all the answers

If lug nuts have streaks of rust on them, what might that indicate?

potentially loose or damaged lug nuts Signup and view all the answers

Study Notes

Truck and Trailer Regulations

Mud flaps must reach within 8 inches of the roadway.
Minimum tiedowns for a load is 2.
If the load protrudes over 4 feet beyond the rear, requirements include a red flag (12x12 inches), a special permit, and a visible light at night.
The greatest allowed weight for any vehicle combination, including load, is 80,000 lbs in Texas.

Road and Driving Strategies

When driving in town, plan ahead for about a single block (12-15 seconds).
On a highway, monitor a quarter mile ahead, which also equates to 12-15 seconds.
For a hill start, partly engage the clutch before releasing the brake.
If descending a long downgrade with brake difficulties, look for escape ramps or uphill turns.

Safety Precautions

Should an accident victim bleed heavily, apply direct pressure to the wound.
Choose to go right when avoiding an obstacle to prevent entering oncoming traffic lanes.
To avoid temporary night blindness from headlights, look at the sidelines instead.
In foggy weather, the best action is to stop in a safe area and wait for improvement.

Equipment and Mirroring

Position the trailer straight with the cab for mirror alignment checks.
Be cautious of road changes; repaving may lower underpass clearance.
Convex mirrors may make objects seem smaller and further than they are.

Emergency Procedures

Warning triangles on a divided highway should be placed at 10 ft, 100 ft, and 200 ft from the vehicle.
On an undivided road, set out triangles at the front, rear, and near the vehicle towards traffic.

Legal and Regulatory Compliance

Compliance with Federal, State, and local cargo regulations is mandatory.
If found with a BAC above 0.0 but below 0.04%, expect to be out of service for 24 hours.
Commercial Driver's License rules allow for only one state license at a time.

Fire Safety

A B:C fire extinguisher is suitable for electrical fires and burning liquids.

Transportation Restrictions

Transporting loose materials such as gravel, sand, or wood chips in an open truck is prohibited in Texas.

Other Important Notes

If lug nuts show rust streaks, it may indicate a problem needing attention.
Heavy fog should prompt safe stopping to avoid visibility hazards.
Coasting down a hill is unlawful in Texas.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your knowledge with this CDL General Knowledge practice quiz. It covers essential information and safety regulations for commercial driving, perfect for those preparing for their CDL exam. Review concepts like truck specifications, planning ahead, and weight restrictions.