General CDL Knowledge and Driving Techniques
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Questions and Answers

What should you do first if a tire blew out on your vehicle at 50 mph?

Stay off the brake until the vehicle has slowed down.

What gear should you use to take a long, steep downhill grade?

A lower gear than you would use to climb the hill.

What might rust around wheel nuts indicate during a pre-trip inspection?

They are loose.

What should be avoided when checking for pre-trip tire inspection regarding mismatched sizes?

<p>Tires of mismatched sizes should not be used together in the same vehicle.</p> Signup and view all the answers

What will a straight vehicle do if it goes into a front-wheel skid?

<p>Go straight ahead even if the steering wheel is turned.</p> Signup and view all the answers

What should you do if you need to leave the road in a traffic emergency?

<p>Avoid braking until your speed has dropped to about 20 mph.</p> Signup and view all the answers

What is true about unstable loads like hanging meat or livestock?

<p>They can require extra caution on curves.</p> Signup and view all the answers

Why should you limit the use of your horn according to the driver's manual?

<p>It can startle other drivers.</p> Signup and view all the answers

What should you do if you do not have a hazardous materials endorsement and are asked to deliver such materials?

<p>Refuse to haul the load.</p> Signup and view all the answers

What is true about staying alert while driving?

<p>Sleep is the only thing that can overcome fatigue.</p> Signup and view all the answers

Pumping the brake may bring the pressure up so you can stop the vehicle when the brakes go to the floor.

<p>True</p> Signup and view all the answers

At 55 mph, what is the total stopping distance you need to bring your vehicle to a stop?

<p>The length of a football field.</p> Signup and view all the answers

What should you do when driving at night?

<p>Adjust your speed to keep your stopping distance within your sight distance.</p> Signup and view all the answers

Unstable loads do not require extra caution on curves.

<p>False</p> Signup and view all the answers

What is a key principle to remember about loading cargo?

<p>Keep the load balanced in the cargo area.</p> Signup and view all the answers

How far should a driver look ahead while driving?

<p>12-15 seconds.</p> Signup and view all the answers

How do you correct a rear-wheel acceleration skid?

<p>Stop accelerating.</p> Signup and view all the answers

What is the purpose of retarders?

<p>Help slow the vehicle while reducing brake wear.</p> Signup and view all the answers

What is controlled braking used for?

<p>To keep a vehicle in a straight line when braking.</p> Signup and view all the answers

What should you do if you are being tailgated?

<p>Increase your following distance.</p> Signup and view all the answers

What should you do while driving a heavy vehicle on an uphill grade before attempting to put it back in motion?

<p>Use the parking brake to hold the vehicle until the clutch engages.</p> Signup and view all the answers

What should you keep in mind about driving in areas with strong wind?

<p>Winds are especially a problem when coming out of tunnels.</p> Signup and view all the answers

What should you do to avoid a crash if an oncoming driver drifts into your lane?

<p>Steer to the right.</p> Signup and view all the answers

You should inspect your tires every two hours or every 100 miles when driving in very hot weather.

<p>True</p> Signup and view all the answers

What should you do when engaging your vehicle in a traffic emergency?

<p>You can almost always turn to miss an obstacle more quickly than you can stop.</p> Signup and view all the answers

What should you avoid doing while driving through deep puddles or flowing water?

<p>Panic stopping.</p> Signup and view all the answers

What is true about double clutching and shifting?

<p>You can use the tachometer to tell you when to shift.</p> Signup and view all the answers

What is counter steering?

<p>Turning the wheel back in the other direction after steering to avoid a traffic emergency.</p> Signup and view all the answers

How should you move back into the pavement after driving on the right shoulder?

<p>If the shoulder is clear, stay on the right until your vehicle comes to a stop then move back into the pavement when it is safe.</p> Signup and view all the answers

What is a good thing to do when driving at night?

<p>Keep your speed slow enough that you can stop within the range of your headlights.</p> Signup and view all the answers

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

<p>Keep an injured person's cool</p> Signup and view all the answers

How far behind should you place reflective triangles if you must stop on a hill or curve on a two-lane two-way road?

<p>Within 500 feet behind you.</p> Signup and view all the answers

Study Notes

General CDL Knowledge

  • In case of a tire blowout, stay off the brake to slow the vehicle naturally.
  • For long, steep downhill grades in a manual truck, downshift to a lower gear.
  • Rust around wheel nuts indicates potential looseness; monitor closely during pre-trip inspections.
  • Avoid using mismatched tire sizes on the same vehicle to ensure safety and performance.
  • During a front-wheel skid, a straight vehicle will continue forward despite steering attempts.
  • When leaving the road during a traffic emergency, brake after reducing speed to about 20 mph.

Cargo and Driving Techniques

  • Unstable loads, such as livestock, require cautious driving on curves.
  • Limit horn use, as it can startle other drivers.
  • Without a hazardous materials endorsement, refuse to transport such loads.
  • Fatigue can only be fully overcome by sleep, highlighting the importance of rest for drivers.
  • If hydraulic brakes fail, pumping the brake may restore enough pressure to stop the vehicle.
  • Total stopping distance at 55 mph on dry pavement can be roughly the length of a football field.

Environmental Considerations

  • Use windshield washer antifreeze in cold weather to maintain visibility.
  • Adjust speed at night to ensure stopping within visible distances.
  • Downshift before curves to maintain control and speed.
  • When setting up reflective triangles for safety, stay between the triangles and oncoming traffic.

Health and Safety Regulations

  • As blood alcohol concentration (BAC) increases, judgment and self-control deteriorate.
  • Mirrors have blind spots; check thoroughly before changing lanes or turning.
  • Low tire pressure increases the risk of hydroplaning.
  • Increase following distance if being tailgated to ensure safety.
  • Properly balance cargo to avoid issues with drive wheel traction.

Driving Practices and Emergency Procedures

  • Maintain a forward lookout of about 12-15 seconds while driving.
  • To correct a rear-wheel skid, stop accelerating immediately.
  • Retarders help slow down vehicles, reducing brake wear.
  • Controlled braking maintains vehicle stability and control.

Collision Avoidance and Vehicle Control

  • Avoid unnecessary steering changes when attempting to clear obstacles.
  • Stop driving if you feel sleepy to prevent accidents.
  • Cool an injured person after an accident; keep them warm otherwise.
  • Gently apply brakes when driving through water to keep them functional.

Vehicle Inspection and Maintenance

  • Heavy vehicles require larger traffic gaps for safe maneuvering.
  • On uphill grades, use the parking brake to hold the vehicle during stops.
  • Reduce speed before curving off-ramps that slope downwards.
  • Display reflective triangles within specified distances when parked on highways.

Fire and Weather Safety

  • Water can effectively cool burning tires in vehicle fires.
  • Stay alert to winds, which can disrupt vehicle stability, particularly near tunnels.
  • Drive cautiously on slippery roads, maintaining slow speed to mitigate hazards.

Speed Management and Awareness

  • Maintain a safe following distance of at least four seconds in good conditions.
  • Hold the steering wheel with both hands on opposite sides for optimal control.
  • Use high beams responsibly and turn them off when oncoming vehicles approach within 500 feet.

Emergency Protocols and Vehicle Operation

  • Avoid placing the ignition key in the ignition during pre-trip inspections; keep it in your pocket.
  • A heavy vehicle must swing wide for turns to safely navigate intersections.
  • Recognize that double clutching can utilize the tachometer for effective shifting.

Brake and Load Management

  • Vehicle stopping distances increase exponentially with speed; doubling speed roughly quadruples stopping distance.
  • Secure loads with one tie-down for every 10 feet to prevent shifting during transit.
  • Apply light pressure on the brake pedal on steep downhill grades to control speed effectively.

Conclusion

  • Always prioritize safety when driving heavy vehicles, from proper pre-trip inspections to managing hazardous weather and driving conditions. Staying alert, following regulations, and applying correct techniques are keys to successful commercial driving.

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Description

Test your understanding of essential CDL knowledge and safe driving techniques. This quiz covers critical information about vehicle operation, maintenance checks, and best practices for handling various driving conditions. Perfect for aspiring truck drivers seeking to enhance their skills.

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