A delivery van is stopped beside the road with its rear doors open. What deserves extra attention as you approach?
Correct answer: A delivery worker stepping out from a hidden position.
Delivery activity can put people close to moving traffic, sometimes hidden by the vehicle or its doors. Scan for people and leave space instead of assuming the area beside the van is empty.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.8.3 Drivers Who Are Hazards / Delivery Trucks; printed page 2-19, physical PDF page 41; reviewed September 22, 2026. ↗
You notice a car ahead braking unpredictably near an exit. What is the main benefit of treating it as a developing hazard?
Correct answer: You can plan space and an escape option before an emergency.
Hazard recognition gives you time to plan. Consider what might happen and how to respond while keeping your observations current; a prediction is not a guarantee of the other driver's movement.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.8.4 Always Have a Plan; printed page 2-21, physical PDF page 43; reviewed September 22, 2026. ↗
A hands-free conversation leaves both hands available. Does that mean it cannot distract a CMV driver?
Correct answer: No. It can still take attention away from driving.
Distraction can be mental as well as physical. A hands-free arrangement does not guarantee full attention to driving, particularly during a demanding conversation or traffic situation.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.9.4 Cell/Mobile Phones; printed page 2-22, physical PDF page 44; reviewed September 22, 2026. ↗
Another driver makes an angry gesture and tries to provoke you. What is the safest response?
Correct answer: Avoid engaging and give the driver room to move away.
Do not turn another person's aggressive behavior into a confrontation. Keep your attention on safe driving, avoid retaliation and allow separation when you can do so safely.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.10.3 Confrontation with an Aggressive Driver; printed page 2-24, physical PDF page 46; reviewed September 22, 2026. ↗
How should interior cab lighting be managed during night driving?
Correct answer: Keep it low enough to avoid glare while instruments remain readable.
Bright interior lighting can interfere with outside vision. Keep instruments readable without unnecessary cab glare, and maintain attention to the road.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.11.5 Night Driving Procedures / cab lighting; printed page 2-27, physical PDF page 49; reviewed September 22, 2026. ↗
A truck's headlamps are dirty and one is poorly aimed. What is the right response before driving at night?
Correct answer: Clean the lamps and have their aim corrected.
Dirty or misaligned headlamps reduce useful road illumination and may create glare for others. Correct their condition rather than compensating with unsafe following or inappropriate beam use.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.11.4 Vehicle Factors / Headlights; printed page 2-26, physical PDF page 48; reviewed September 22, 2026. ↗
Oncoming high beams make it hard to see. Where should you direct your attention?
Correct answer: Toward the right side of your lane, without staring at the lights.
Avoid looking directly into bright oncoming lamps. Use the right side of your lane as a guide while continuing to monitor your path and adjusting speed for the visibility you actually have.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.11.5 Night Driving Procedures / oncoming glare; printed page 2-27, physical PDF page 49; reviewed September 22, 2026. ↗
Which headlight setting generally gives better visibility in fog?
Correct answer: Low beams, because high beams reflect more light back toward you.
High beams reflect off fog and can worsen the driver's view. Use low beams and an appropriate reduced speed; better lighting does not remove the need for a safe visibility margin.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.12 Driving in Fog; printed page 2-27, physical PDF page 49; reviewed September 22, 2026. ↗
After a long drive on a hot day, tire pressure is above its cold reading. Should you bleed air merely to restore the cold reading?
Correct answer: No. Recheck under the proper cold-inflation conditions.
Pressure normally rises as a tire heats. Bleeding it to the cold figure while hot can leave it underinflated after cooling. Follow the specified cold-pressure check and stop to investigate overheating.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.14.1 Vehicle Checks / Tires; printed page 2-29, physical PDF page 51; reviewed September 22, 2026. ↗
The engine overheats and the cooling system is still hot. What should you do about a pressurized radiator or coolant cap?
Correct answer: Leave it closed until the system has cooled and follow service instructions.
Hot pressurized coolant can escape and cause severe burns. Stop safely, allow the system to cool and follow the vehicle's service procedure. A hot cap should not be opened as an immediate cooling shortcut.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.14.1 Vehicle Checks / Engine Coolant; printed page 2-29, physical PDF page 51; reviewed September 22, 2026. ↗
Why must a driver monitor engine temperature when using a winter front or radiator cover?
Correct answer: Restricting airflow too much can cause the engine to overheat.
A winter cover changes cooling airflow. Too much restriction can overheat an engine even in cold weather, so use the proper equipment and monitor temperature.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.13.1 Vehicle Checks / Radiator Shutters and Winterfront; printed page 2-28, physical PDF page 50; reviewed September 22, 2026. ↗
A railroad crossing has a crossbuck but no active lights or gates. What does the lack of active warnings mean?
Correct answer: You must use the signs and your own observation to assess trains.
A passive crossing does not actively warn you with lights or gates. Observe and obey the signs, look and listen, and meet any stopping requirement that applies to your vehicle or load.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.15.1 Types of Crossings; printed page 2-30, physical PDF page 52; reviewed September 22, 2026. ↗
You have safely steered onto a clear shoulder to avoid a collision, and there is room to stop. What is generally safer than immediately jerking back onto the road?
Correct answer: Stay on the shoulder until stopped and return when safe.
When the shoulder provides a safe stopping path, stopping there avoids a sudden uncontrolled return. Do not assume every shoulder can support a truck; evaluate its surface, obstacles and available space.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.17.1 Steering to Avoid a Crash / Stay on the Shoulder; printed page 2-33, physical PDF page 55; reviewed September 22, 2026. ↗
A truck with hydraulic brakes loses pedal pressure. Which temporary response does the handbook describe as sometimes rebuilding enough pressure to help stop?
Correct answer: Pumping the hydraulic brake pedal.
For hydraulic pressure loss, pumping the pedal may build temporary pressure. This is not an instruction for air brakes or normal ABS operation. Stop safely and have the fault corrected; a temporarily firmer pedal does not make the truck serviceable.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.17.3 Brake Failure / Loss of Hydraulic Pressure; printed page 2-34, physical PDF page 56; reviewed September 22, 2026. ↗
A front tire blows out, but no immediate collision requires emergency braking. What should you do first?
Correct answer: Hold the wheel firmly and let the truck slow without hard braking.
A blowout can pull or destabilize the truck. Keep a firm grip, avoid braking initially unless needed to avoid an immediate collision, and slow before braking gently and stopping safely.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.17.4 Tire Failure / Respond to Tire Failure; printed page 2-35, physical PDF page 57; reviewed September 22, 2026. ↗
You hear a tire burst but the truck still seems to handle normally. What should happen after you reach a safe stopping place?
Correct answer: Inspect all tires because one tire in a dual pair may have failed.
A dual tire can fail without dramatic handling changes. Do not assume normal steering proves the tires are sound; stop safely and check all tires.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.17.4 Tire Failure / Check the Tires; printed page 2-35, physical PDF page 57; reviewed September 22, 2026. ↗
Smoke is coming from inside a closed box trailer. Why should the driver keep the cargo doors shut?
Correct answer: Opening them can add oxygen and make the fire flare up.
Opening a burning cargo compartment can rapidly feed the fire. Keep the doors closed, stay clear and call emergency services, especially when the cargo may include hazardous materials.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.21.3 Fire Fighting / closed trailer; printed page 2-39, physical PDF page 61; reviewed September 22, 2026. ↗
You do not know what is burning in a load that may contain hazardous materials or which extinguisher is suitable. What should you do?
Correct answer: Keep clear and let trained firefighters handle the fire.
The wrong extinguishing method can worsen a fire or create another hazard. If the material or suitable agent is uncertain, keep clear, notify responders and leave the response to trained firefighters.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.21.3 Fire Fighting / uncertain extinguishing agent; printed page 2-39, physical PDF page 61; reviewed September 22, 2026. ↗
A trained person has judged a small fire safe to tackle with a suitable extinguisher and a clear escape route. Where should the discharge be aimed?
Correct answer: At the base or source of the fire.
An extinguisher must act on the source of the fire rather than just its upper flames. This does not mean approaching a large, unknown or unsafe fire; leave when conditions are unsafe and call emergency services.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.21.3 Fire Fighting / source or base; printed page 2-39, physical PDF page 61; reviewed September 22, 2026. ↗
Visible flames and smoke have stopped after a vehicle fire. What should a driver remember?
Correct answer: Hot material can reignite; the absence of flames is not an all-clear.
Material may remain hot and reignite even when flames or smoke are no longer visible. Do not treat that appearance as permission to resume driving; keep clear and follow the emergency response and inspection process.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.21.3 Fire Fighting / reignition; printed page 2-39, physical PDF page 61; reviewed September 22, 2026. ↗
