Alberta Class 4 Knowledge Test: all 276 questions with answers

Each question leads to its own page with the answers and the solution.

• Commercial Licences and Medical Fitness32 questions
• National Safety Code, Hours and Daily Log32 questions
• Trip Inspections32 questions
• Stopping Distance, Mirrors and Fatigue32 questions
• Turns, Reversing and Railway Crossings30 questions
• Taxis, Ambulances and Ride for Hire30 questions
• Transporting Passengers28 questions
• Emergencies, Collisions and Fuelling28 questions
• Road Signs and Signals32 questions

Commercial Licences and Medical Fitness

• 101What is the minimum age to learn to drive or be licensed for an Alberta Class 4 licence?
• 102Can a driver who is still in the probationary (GDL) program apply for a Class 4 licence?
• 103What is the largest bus a Class 4 licence holder may operate?
• 104A Class 4 driver has been offered a job driving a small school bus. What else is required?
• 105Which two vehicle types are named specifically as allowed for a Class 4 licence holder?
• 106Under what condition may a Class 4 holder operate vehicles that belong to Classes 1, 2, 3 and 6?
• 107In Alberta, a bus is defined as a commercial vehicle designed to carry how many persons?
• 108Which of these is NOT a commercial vehicle under the definition in the guide?
• 109Which description matches the definition of an ambulance?
• 110How does a driver earn an S-endorsement on an Alberta driver's licence?
• 111For which licence classes must a Class 4 applicant show knowledge?
• 112Before you may learn to drive a Class 4 vehicle, which licence must you already hold at a minimum?
• 113Upgrading to which licence classes requires a medical report?
• 114A new Alberta resident holds a non-GDL Class 5 licence from another Canadian province and wants to re-class to Class 4. What waiting period applies?
• 115A company owner lets an employee without the proper licence class drive a passenger van for hire. Who has broken the law?
• 116Where can most applicants take the Class 4 knowledge test?
• 117Which material are the Class 4 knowledge test questions based on?
• 118How is the commercial knowledge test scored?
• 119At what point is the knowledge test stopped and a fail recorded?
• 120What happens if you do not meet the minimum vision standards at your vision assessment?
• 121Who must complete the medical report needed to upgrade to Class 4?
• 122A 30-year-old holds a Class 4 licence. How often must they provide a medical report to keep it?
• 123A 52-year-old ambulance driver holds a Class 4 licence. How often is a medical report required?
• 124A 68-year-old taxi driver holds a Class 4 licence. How often is a medical report required?
• 125Who may ask any driver, regardless of licence class, for a medical report?
• 126You develop a health condition that may affect your ability to drive. What must you do?
• 127Since February 1, 2023, what applies to the Class 4 road test?
• 128Without a road test, what must a Class 4 applicant still provide or meet?
• 129A Class 4 learner must be accompanied by a supervisor. Which licence class may the supervisor hold?
• 130Within how many days must you notify Alberta Registries of a change of name or address?
• 131Who is responsible for making sure a commercial driver's licence is renewed on time?
• 132Once you are hired as a commercial driver, who is required to provide additional training?

National Safety Code, Hours and Daily Log

• 201When did the National Safety Code for commercial motor carriers come into effect in Canada?
• 202Under federal law, a carrier operating outside Alberta needs a Safety Fitness Certificate for a passenger vehicle with what original seating capacity?
• 203A carrier based in Edmonton sends one of its buses on regular trips into Saskatchewan. Which National Safety Code legislation applies to the carrier?
• 204What can happen to a carrier that keeps posing an unacceptable risk to the public and does not respond to intervention?
• 205An Alberta carrier fails to establish and follow a written safety program. Which consequence is possible?
• 206A Class 4 driver receives a speeding conviction while working. According to the driver's duties, what should the driver do?
• 207An enforcement officer inspects your bus at the roadside and gives you an inspection document. What is your responsibility?
• 208During your inspection you find a defect that would jeopardize the safety of your passengers. What must you do?
• 209What is the main purpose of hours of service legislation?
• 210A carrier falls under federal hours of service rules, but one of its drivers never leaves Alberta. Which rules apply to that driver?
• 211Under Alberta hours of service rules, a work shift generally starts after how many consecutive hours off duty?
• 212Under Alberta rules, a driver may not drive in a work shift after having driven how many hours?
• 213Under Alberta rules, after how many hours on duty in a work shift may a driver no longer drive?
• 214Under Alberta rules, within how many days must a driver deliver the daily log and supporting documents to the employer?
• 215How long must a driver keep a copy of each daily log and its supporting documents under Alberta rules?
• 216Under Alberta rules, a driver may skip the daily log only if they stay within what radius of the home terminal (along with the other conditions)?
• 217A taxi driver working solely in Alberta stays within 100 km of the home terminal and works 11 hours, but ends the shift in a different town from where it began. Is a daily log required?
• 218Under the federal rules, a driver may not drive in a day after being on duty for how many hours?
• 219How much off-duty time must a driver take each day under the federal hours of service rules?
• 220Under the federal rules, a driver may not drive once how much time has elapsed since the end of their last eight consecutive hours off duty?
• 221What is the on-duty limit for a driver on federal cycle 1?
• 222What is the on-duty limit for a driver on federal cycle 2?
• 223How many consecutive hours off duty reset a federal cycle 1 driver's accumulated hours to zero?
• 224How many consecutive hours off duty reset a federal cycle 2 driver's accumulated hours to zero?
• 225Under the federal rules, a driver may not drive unless they have taken at least 24 consecutive hours off in the preceding how many days?
• 226Under the federal radius exemption, what must a driver who skips the daily log do at the end of each day?
• 227Under Alberta's Vehicle Inspection Program, how often must a bus designed for 11 or more passengers be inspected?
• 228Which buses are exempt from Alberta's Vehicle Inspection Program when operating solely within Alberta?
• 229Which item must be recorded on the daily log at the start of the day?
• 230What must be written in the Remarks section of the daily log each time the duty status changes?
• 231Your vehicle's electronic logging device stops working properly during a shift. What must you do?
• 232How far may a driver use their commercial vehicle for personal use each day, if all the conditions are met?

Trip Inspections

• 301A carrier that operates only within Alberta must complete trip inspection reports on commercial passenger vehicles with what designed seating capacity?
• 302How long is a completed trip inspection and its report valid?
• 303When choosing a rest and check stop, where should you avoid stopping?
• 304When must a major defect found on a commercial vehicle be reported to the carrier?
• 305A driver finds a minor defect listed on the inspection schedule. What is the latest it may be reported to the carrier?
• 306Under what condition may a driver keep driving with a minor defect listed on the inspection schedule?
• 307What does the law say about driving a commercial vehicle on a highway when a major defect listed on the inspection schedule is present?
• 308A yard staff member inspects a bus and signs the trip inspection report. Who is responsible under law for that inspection?
• 309Besides the initial inspection, what must a driver do about defects while on the road?
• 310On the demand of a peace officer, what must a commercial driver produce?
• 311Which reading must be recorded on a trip inspection report?
• 312Which NSC inspection schedule is used to inspect a bus?
• 313When must the strobe lamp on a school bus be activated?
• 314What can happen to a commercial vehicle that an inspector finds does not meet requirements?
• 315When square blocks are used to chock the wheels before an inspection, what is their minimum size?
• 316Which set of steps should be taken before beginning a trip inspection?
• 317What does the guide say about the order of a circle check?
• 318Where should the engine oil level be on the dipstick?
• 319During the under the hood check, a loose or slipping belt may cause which warning light to come on?
• 320What is the minimum tread depth for a steering axle tire during the walk-around?
• 321During an ambulance inspection, what is the minimum tread depth for the drive axle tire?
• 322Whenever possible, how should the brake lights be checked during an inspection?
• 323During a bus inspection the ammeter keeps showing a discharge after the engine is running. What should the driver do?
• 324Which check is listed specifically for the rear of an ambulance?
• 325During a bus inspection, how must the passenger door operate?
• 326Which commercial vehicles must report to a vehicle inspection station when the highway lights are flashing?
• 327At a vehicle inspection station the "PARK" light is activated. What should you do?
• 328How long after the manufacture date do all fire extinguishers expire?
• 329How often must a fire extinguisher be re-certified?
• 330The yellow anti-lock brake system warning light comes on while you are driving. What does it mean?
• 331In the area swept by the windshield wipers, cracks or chips must not be greater than what diameter?
• 332Why should an exhaust leak on a bus be reported immediately?

Stopping Distance, Mirrors and Fatigue

• 401Accumulating how many demerit points within two years can lead to a driver's licence suspension?
• 402A driver receives a traffic ticket and pays the fine voluntarily. What is the result?
• 403A commercial driver needs to make a call while driving. What should the driver do?
• 404When is a GPS navigation system permitted while driving?
• 405When may the driver of an ambulance responding to a call use a hand-held communication device?
• 406What is the maximum width allowed for a commercial vehicle?
• 407A vehicle is wider than 2.05 metres. What clearance lights are required?
• 408What is the maximum length allowed for a straight truck or a bus (not an intercity bus)?
• 409What is the maximum height of a commercial vehicle, measured from the ground surface?
• 410If a vehicle's weight is doubled, about how long will it take to stop?
• 411How much braking force is needed to stop a vehicle when its speed is doubled?
• 412If both the speed and the weight of a vehicle are doubled, how much more force is required to stop it?
• 413When does a vehicle have the most traction during braking?
• 414What is the average person's perception time?
• 415About how long does it take an air brake system to respond after the driver presses the brake pedal?
• 416Total stopping distance is the sum of which distances?
• 417Compared with a level road at the same speed, how does a downhill grade affect stopping distance?
• 418When is the driver of a taxi exempt from wearing a seat belt?
• 419By how much does wearing a seat belt reduce the chance of being killed or injured in a collision?
• 420How far around the vehicle does the "danger zone" extend?
• 421On a bus, which area should the crossover mirrors be adjusted to show?
• 422How far behind the vehicle should a correctly adjusted left or right flat mirror let you see?
• 423How far can the blind spot behind a large vehicle's rear bumper extend?
• 424What following distance rule should you use when operating a large vehicle?
• 425What should you do with your following distance when weather, road or traffic conditions are poor?
• 426Speeding and risk taking are examples of which type of driver error?
• 427How often should you check your mirrors while driving?
• 428About how far ahead of your present position should your gaze be?
• 429How far out from a parked vehicle should you position your commercial vehicle?
• 430What are the three steps of the basic collision prevention formula?
• 431During which times do most fatigue-related collisions happen?
• 432To help prevent driver fatigue, how often should you schedule a break?

Turns, Reversing and Railway Crossings

• 501On a two-lane highway, when may a commercial vehicle pass another vehicle while climbing a grade?
• 502What should be the main method of controlling speed when driving down a grade?
• 503How many flashes of the turn signal should you give at a minimum before beginning a lane change?
• 504Which description matches a stale green traffic light?
• 505You are already in the intersection waiting to turn left when the light turns amber. What does the amber light mean for you?
• 506Before proceeding from a stop at a red light that has turned green, in which order should you look?
• 507About how far does the danger zone around a bus extend, where pedestrians and other vehicles may be present?
• 508When stopping for a pedestrian at a crosswalk, how far back should you stop?
• 509What is the required speed limit when amber lights are flashing at a pedestrian crosswalk?
• 510During a low speed turn in the city, what do the rear tires of a large vehicle do?
• 511Approximately how far before a turn should you signal in urban and rural areas?
• 512While stopped waiting to turn left, why should your front wheels stay pointed straight ahead?
• 513When making a left turn from a dual-lane turn with no arrows or markings directing otherwise, which lane should a commercial vehicle use?
• 514At what speed should a large vehicle enter a curve?
• 515When chocking the wheels of a vehicle parked on a downhill grade, where should the chocks go?
• 516By law, how far from the curb may the wheels of a parked vehicle be at most?
• 517You park a bus uphill on the right side of the road next to a curb. Which way should the front wheels be turned?
• 518If the engine of a parked bus will stay running, what must be done?
• 519Which three questions should a driver ask before reversing?
• 520How often should you sound the horn while reversing a commercial vehicle?
• 521What should you do if the reversing distance exceeds two vehicle-lengths?
• 522When is it legal to reverse a school bus on school grounds or at a location next to them?
• 523When may a vehicle not make a U-turn on a curve or near the crest of a hill?
• 524Which condition is required before a school bus may make a U-turn?
• 525A train is approaching a railway crossing. How close to the nearest rail may you stop?
• 526Within what distance of a crossing must a train be for you to stop, whether or not a signal is activated?
• 527You have started across the tracks when the crossing lights begin to flash. What should you do?
• 528Your vehicle stalls on a crossing and a train is coming. After getting out, which way should you move?
• 529Which lights should a school bus activate at an uncontrolled railway crossing?
• 530On a reserved lane sign, what does a white diamond on a black background indicate?

Taxis, Ambulances and Ride for Hire

• 601When must a school bus driver activate the alternately flashing amber lights?
• 602What must a school bus driver activate while passengers are being loaded and unloaded?
• 603In which conditions should a school bus with a strobe lamp activate it?
• 604A school bus with its alternately flashing red lights on is stopped on a divided highway. Which drivers must stop?
• 605Traffic is following your bus as a stop approaches. What does the guide call the safest place for that traffic?
• 606May a bus use the shoulder or parking lane of a provincial highway as a driving lane before a stop?
• 607You signal right for a bus stop, but there is a driveway before your intended stop. What should you do with the signal?
• 608When a school bus parks on the roadway to load students, how far from the waiting students should it stop at a minimum?
• 609How must a bus be secured once it has stopped to load or unload passengers?
• 610At what point should the alternately flashing red lights be activated at a stop?
• 611Students must cross a rural highway after leaving the bus. How far in front of the bus should they walk first?
• 612In which type of bus may passengers stand while the bus is moving?
• 613Before moving away from a stop, which mirrors should you check to make sure no one is lingering near the bus?
• 614On a school bus, what automatically cancels the alternately flashing red lights?
• 615How do bus drivers communicate with other motorists at a stop?
• 616A driver passes your school bus while the alternately flashing red lights are on. What can you do?
• 617When may the siren on an emergency vehicle be operated?
• 618With its siren operating, when may an emergency vehicle exceed the speed limit or go through a stop signal?
• 619Which emergency vehicle has the right-of-way over all other vehicles?
• 620An ambulance is operating during an emergency. Is it enough to use only the red flashing overhead lights?
• 621When may an emergency vehicle be parked contrary to the parking rules?
• 622Which lights should always be used together with the emergency overhead lights?
• 623Lack of awareness of the size of an emergency unit can lead to which type of collision?
• 624An ambulance on an emergency call approaches an intersection with cross traffic. What should the driver do?
• 625When driving an emergency vehicle on a four-lane highway with lights and siren on, which lane should you use if possible?
• 626How should an emergency vehicle be parked at the scene of a collision?
• 627For which reason may a taxi, limousine, or ride for hire driver refuse to transport a customer?
• 628Who sets the requirements for issuing a taxi or limousine permit?
• 629What does "for hire" mean when deciding whether a driver needs a Class 4 licence?
• 630A driver carries only family members and household members under an agreement, receiving compensation just for that. Is the vehicle for hire for Class 5 purposes?

Transporting Passengers

• 701Which of these is an indicator of ineffective communication with a passenger?
• 702Which of the following is one way a commercial passenger driver demonstrates professionalism?
• 703What is the alcohol and drug standard for a commercial driver under the immediate roadside sanction in the Traffic Safety Act?
• 704A first time offender found guilty of impaired driving under the Traffic Safety Act is disqualified from driving for how long?
• 705How often should a commercial driver carry out a self-assessment of their fitness to drive?
• 706Why should a driver speak to passengers in a normal tone of voice?
• 707Another driver directs road rage at you while you are carrying a passenger. What should you do?
• 708Which habit helps a driver avoid decisions or actions that could be considered road rage?
• 709A passenger becomes difficult during a trip. What should be your first step?
• 710Which phrase should a driver avoid when dealing with an irate passenger?
• 711You feel uncomfortable transporting a passenger because of their words or actions. What should guide your decision to refuse the trip?
• 712When should destination information be entered into the GPS navigation system?
• 713A passenger travels with a pet or service animal. What does the Traffic Safety Act require of the driver?
• 714Why should a passenger vehicle driver avoid driving below the approved speed limit?
• 715When unloading passengers with children, what is a recommended post-driving procedure?
• 716After passengers have left the vehicle, why should you scan the back seat?
• 717When transporting a person with a disability, how should you find out what help they need?
• 718Which are the three most common types of mobility devices?
• 719A passenger with a disability travels with an attendant. Whom should you communicate with first, whenever possible?
• 720When talking for a significant time with a passenger who uses a wheelchair, where should you place yourself?
• 721How should you assist a passenger who is visually impaired?
• 722What is the recommended way to get the attention of a passenger who is hearing impaired?
• 723When pushing a passenger in a wheelchair, how far ahead should you watch?
• 724What should you do whenever a wheelchair you are assisting is stopped?
• 725A scooter user will transfer to a vehicle seat. After the scooter is moved to a secure spot, what is the next step?
• 726Which strategy helps when communicating with a passenger who faces a language barrier?
• 727Who is responsible for making sure passengers under the age of 16 are properly restrained in a seat belt or car seat?
• 728Under the law, a child below what weight requires a car seat?

Emergencies, Collisions and Fuelling

• 801You discover a fire while carrying passengers on a bus. After stopping in a safe location, how far from the vehicle should passengers be moved?
• 802Depending on its type and size, about how much chemical discharge time does a portable fire extinguisher give you?
• 803From which direction should you approach a fire with an extinguisher, if possible?
• 804In the PASS method for using a fire extinguisher, what does the letter A stand for?
• 805After you have used a fire extinguisher and the fire is out, what must you do?
• 806Your vehicle breaks down on a highway outside an urban municipality during daylight. Where should approved warning devices be placed?
• 807Your vehicle breaks down on a highway outside an urban municipality at night. Where should approved warning devices be placed?
• 808For placing warning devices after a breakdown, the night rules also apply whenever there is not enough light to clearly see people or vehicles at what distance?
• 809Your bus has broken down, but it is not stopped in a dangerous location. What is usually safer for the passengers?
• 810You are already driving at the maximum posted speed and a driver is following too closely. What should you do first?
• 811An oncoming vehicle is heading toward you head-on and slowing down has not helped. What should you do?
• 812About what share of all two-vehicle collisions occur at intersections?
• 813Is it legal to pass another vehicle by driving on a provincial highway shoulder to the right of the solid white line?
• 814Which statement about moose on or near the road is correct?
• 815You have stopped after a minor collision with no injuries. As a general rule, when may you move the vehicle?
• 816A collision causes no injuries and damages no public property. Above what amount of overall damage must it be reported to police?
• 817While exchanging information at a collision scene, what should a driver avoid?
• 818If you are trained in first aid at a major collision, whom should you treat first?
• 819In normal traffic conditions, a stopped bus should be visible for at least what distance? A stopping position without this visibility is a reason to evacuate.
• 820When evacuating a vehicle, which passengers should leave first?
• 821What is the first step of a front door evacuation of a bus?
• 822When should a bus's emergency windows be used during an evacuation?
• 823Where should a restraint cutter be stored?
• 824Before picking up passengers in a bus or taxi, what should you make sure of regarding fuel?
• 825When refuelling a propane vehicle, how large an area around the dispenser or container must be free of anything that could ignite?
• 826How much fuel is wasted for each 10 pounds per square inch that tires are under-inflated?
• 827When you stop for any length of time, why is it better to turn off the engine than to let it idle?
• 828Generally, how much more fuel do you use for every 10 km/h you drive above 90 km/h?

Road Signs and Signals

• 901You are driving a taxi at 08:15 on a Wednesday and this sign hangs over the curb lane. What does it tell you?
• 902This reserved lane sign shows no hours or days. When is the lane below it reserved?
• 903You are driving a 20-passenger bus. May you travel in the lane marked by this sign?
• 904This signal is lit above the lane you are driving in. What is it telling you?
• 905On a road with reversible lanes, what does this signal above a lane mean?
• 906You face this signal at an intersection. What does it allow you to do?
• 907At an intersection, this red light is flashing for drivers in every direction. How must the intersection be treated?
• 908Which statement about this flashing green light is correct?
• 909The light ahead has just changed to this, and you can still stop safely. What must you do?
• 910Your light has been green for a while, and the pedestrian signal at the intersection shows this symbol. What should you do?
• 911The yellow lights on this sign are flashing as you approach in your bus. What is required?
• 912The amber lights on this sign are flashing. What does that warn you about?
• 913Your school bus approaches an uncontrolled railway crossing marked only by this sign. Where must you stop?
• 914Near a railway crossing you see this sign. What is it telling you?
• 915What does this yellow warning sign tell you?
• 916On a rural highway, you see this X painted across your lane. What is it warning you about?
• 917You pass this sign at 9:00 a.m. on a school day. No other times are posted. What applies?
• 918This warning sign is posted on a rural road. What is ahead?
• 919You see this sign with no speed sign attached to it. What does it tell you?
• 920In a construction zone you pass this sign. What are you required to do?
• 921You pass this sign on a Sunday and see no workers or equipment. What about the construction zone speed limit?
• 922You are caught speeding past road crews working in a construction zone. How are the fines in that zone set?
• 923This sign is mounted on the back of the vehicle ahead of you. What does it tell you?
• 924What should you watch for after passing this warning sign?
• 925What does the speed on the yellow tab under this curve sign show?
• 926Your bus is in the right one of the two lanes under this sign. How should you make the turn?
• 927At 17:00 on a Thursday, a taxi passenger asks to be let out at the curb beside this sign. What applies?
• 928Driving a loaded bus, you see this warning sign. What is ahead?
• 929Which type of sign uses a fluorescent yellow green pentagon shape?
• 930Which sign design is used to indicate lane control?
• 931Unless otherwise posted, what is the maximum speed limit on a provincial highway outside an urban area?
• 932Why should you not stop in a no stopping zone painted on the pavement at an intersection?