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BC Class 1–4 overview

ICBC air brake test questions: 50 printable practice questions with answers

50 original BC Class 1–4 practice questions on one printable sheet, with a separate answer key, an explanation and the handbook chapter for every answer. Print it or save it as a PDF. Free; not the official test.

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This page puts 50 original practice questions for the ICBC Commercial Driver Knowledge Test (Class 1–4 and Air Brakes) on one sheet you can print or save as a PDF. They are drawn evenly from our 24 topics (licence classes, endorsements and testing, heavy vehicle braking, basic commercial driving skills, tires, warnings and personal safety, fuel-efficient driving, backing and handling trailers, coupling and uncoupling and loading and weight distribution, among others), so one sitting covers the whole test, not just the easy chapters.

The answer key starts on a new page after the last question. Each answer has a short explanation and the chapter of the Driving Commercial Vehicles it comes from, so you can check the rule in the official source instead of memorising our wording. These are not the official test questions: the Insurance Corporation of British Columbia (ICBC) does not publish its question bank. When the sheet feels easy, sit a timed mock exam of 50 questions (you need 40 correct to pass our mock).

Jump to the answer key

  1. 1.How many tiedowns secure a vehicle over 4,500 kg carried as cargo?

    1. At least six, any rating
    2. Two, one at the front and one at the rear
    3. Four, each rated at least 2,268 kg
    4. One chain over the frame

  2. 2.A school bus with children reaches an uncontrolled main railway crossing. What must the driver do?

    1. Stop right at the first rail
    2. Turn on the red lights and cross
    3. Slow down and cross without stopping if clear
    4. Stop 5 to 15 m away and listen

  3. 3.When should you drain a trailer's air suspension before parking it?

    1. Before applying the trailer brakes
    2. Only in winter
    3. After driving away from the parked trailer
    4. Never; leave it charged

  4. 4.What does a steady white rectangular transit priority light mean?

    1. Only buses may go
    2. Trucks must stop
    3. All traffic may turn right
    4. Pedestrians may cross

  5. 5.How should you start a heavy diesel engine?

    1. With the throttle held halfway
    2. With zero throttle
    3. Pumping the throttle twice
    4. With ether every time

  6. 6.Why can an air brake system tolerate a small leak better than a hydraulic one?

    1. Air brakes have no lines to leak
    2. Hydraulic fluid evaporates faster
    3. Air cannot escape through small holes
    4. The compressor keeps making more air

  7. 7.On a highway, how much space should you leave between your large commercial vehicle and another large commercial vehicle?

    1. At least 150 m (500 ft)
    2. At least 20 m (65 ft)
    3. At least 60 m (200 ft)
    4. At least one vehicle length

  8. 8.How does the heavy trailer endorsement (code 20) pre-trip differ from Class 1?

    1. It leaves out the air brake steps
    2. It is done with the engine running
    3. It adds a coupling-only test
    4. It skips the lights check

  9. 9.Which colour usually marks the control (service) glad hand?

    1. Blue
    2. Yellow
    3. Red
    4. Green

  10. 10.What does a relay valve reduce?

    1. Wear on the brake linings
    2. Fuel used by the compressor
    3. Air pressure in the wet tank
    4. Lag on both application and release

  11. 11.Why must you slow down on curves with a liquid tank load that has no baffles?

    1. The tank may leak at the valves
    2. Baffles are required only on hills
    3. The pump may overheat
    4. The liquid surges and can tip the vehicle

  12. 12.What is compounding?

    1. Using the hand valve and the foot valve at the same time
    2. Draining two reservoirs at once
    3. Heavy service braking on top of applied spring brakes
    4. Connecting two trailers to one tractor

  13. 13.In what language are ICBC commercial knowledge tests given?

    1. English or French, with a translator
    2. English, with a dictionary allowed
    3. English only, without assistance
    4. Any language through an interpreter

  14. 14.What is the daily distance limit for the personal use exemption?

    1. 160 km
    2. 50 km
    3. 75 km
    4. 25 km

  15. 15.When is a tractor-trailer more likely to roll over?

    1. When moving slowly in reverse
    2. When loaded and turning too quickly
    3. When parked on a slight grade
    4. When empty on a straight road

  16. 16.About how long is air brake lag?

    1. One-tenth of a second
    2. Two seconds
    3. Four-tenths of a second
    4. Three-quarters of a second

  17. 17.An 18-year-old wants to drive for a taxi company. Can they get a Class 4 restricted licence?

    1. Yes, after a TaxiHost course
    2. Yes, with a parent's signature
    3. Yes, if they have held Class 5 for a year
    4. No, the minimum age is 19

  18. 18.Why do the leakage test with the parking brakes released?

    1. To check the low-air warning
    2. To avoid compounding
    3. To save fuel
    4. To hear the compressor

  19. 19.On the road test, what is the time target for completing a Class 2 bus pre-trip?

    1. Less than 45 minutes
    2. Less than 30 minutes
    3. Less than 10 minutes
    4. About an hour

  20. 20.What does a visible red marking on a new pushrod mean?

    1. The brake was adjusted correctly this morning
    2. The brake is badly out of adjustment
    3. The pushrod is the wrong size
    4. The chamber is a long-stroke type

  21. 21.When may an ambulance driver use flashing red lights to get the right-of-way?

    1. When on a call or carrying a patient
    2. Whenever returning to the station after a call
    3. In heavy traffic at any time
    4. Only at night

  22. 22.Where may a portable scale be set up?

    1. Only on private property
    2. Only at border crossings
    3. Only at fixed scale sites
    4. On any public road

  23. 23.On a multi-day trip, when is a new trip inspection report due?

    1. By the first rest stop of each later day
    2. Only at the very end of the multi-day trip
    3. Only if a defect appears
    4. Every 1,000 km

  24. 24.How far should your breastbone be from a steering-wheel airbag?

    1. At least 25 cm (10 in)
    2. At least 50 cm (20 in)
    3. At least 10 cm (4 in)
    4. As close as is comfortable

  25. 25.Which vehicles do B.C.'s cargo securement rules apply to?

    1. Only vehicles crossing provincial borders
    2. Only trucks over 5,500 kg
    3. Every vehicle carrying cargo on a highway
    4. Only flat-deck trailers

  26. 26.Before opening the doors at a stop, from how far must the school bus be visible in each direction?

    1. At least 60 m
    2. At least 30 m
    3. At least 150 m
    4. At least 85 m

  27. 27.When uncoupling, why back gently against the trailer before setting the tractor brakes?

    1. To drain the air tanks
    2. To test the trailer's spring brakes
    3. To ease pressure on the locking jaws
    4. To raise the landing gear

  28. 28.For a Class 6.2 infectious substance spill, whom should you call for technical advice?

    1. The nearest hospital
    2. WorkSafeBC
    3. ICBC claims
    4. CANUTEC

  29. 29.Between 90 and 100 km/h, about how much of the fuel goes to overcoming air resistance?

    1. About one-tenth
    2. About half
    3. Almost all
    4. About one-quarter

  30. 30.The ABS warning light stays on while you drive. What does this mean?

    1. All braking has failed and you must stop now
    2. The air pressure is too high
    3. The parking brakes are applied
    4. ABS has failed, but normal brakes still work

  31. 31.When should you dim to low beams?

    1. At least 50 m from any oncoming traffic you can see
    2. Only in town
    3. Only when oncoming drivers flash you
    4. At least 150 m from other vehicles

  32. 32.In the first tug test, which brakes are applied?

    1. The trailer brakes only
    2. The tractor brakes only
    3. Both sets of brakes
    4. Neither set of brakes

  33. 33.How long must dynamited brakes on a trailer without spring brakes stay applied?

    1. At least 15 minutes
    2. At least one hour
    3. At least 2 minutes
    4. Until the driver releases them

  34. 34.What do the one-way check valves between the reservoirs do?

    1. Stop air flowing back out of the service tanks
    2. Warn the driver of low air
    3. Exhaust air quickly on release
    4. Raise the pressure in the wet tank when braking

  35. 35.Where should a concentrated heavy load go on a straight truck?

    1. Tight against the headboard behind the cab
    2. Partly over or just ahead of the rear axles
    3. On the side nearest the curb
    4. At the very back of the deck

  36. 36.About how much force does the coil spring in most spring brake chambers exert?

    1. 5,000 to 6,000 pounds
    2. 1,500 to 2,000 pounds
    3. About 500 pounds
    4. 150 to 200 pounds

  37. 37.When did MELT become mandatory for new Class 1 applicants in B.C.?

    1. April 1, 2000
    2. September 1, 2023
    3. October 18, 2021
    4. January 1, 2019

  38. 38.Which vehicles are covered by the National Safety Code in B.C.?

    1. Commercial vehicles licensed over 5,000 kg GVW
    2. Only tractor-trailers over 63,500 kg
    3. Only vehicles that cross into Alberta
    4. Any vehicle used to commute to work

  39. 39.Why must you never unlock the pintle hook while the converter dolly is still under the rear trailer?

    1. The air lines will freeze
    2. The dolly brakes will lock and damage the tires
    3. The tow bar can fly up and hurt someone
    4. The trailer will roll forward

  40. 40.What is the maximum fine for operating a vehicle whose brakes are not properly adjusted?

    1. $2,000
    2. $10,000
    3. $500
    4. $200

  41. 41.Where may a let-down (jump) seat be used?

    1. In the trunk area of a wagon
    2. In any vehicle, as long as you have a permit
    3. Beside the driver
    4. Only in the rear of a sedan built for it

  42. 42.How should you treat the vehicle's history for the pre-trip test?

    1. Assume it has not been driven that day
    2. Assume it was inspected this morning
    3. Skip items a mechanic has signed off
    4. Assume the brakes were adjusted yesterday

  43. 43.What does the guide say is always more important than meeting the schedule?

    1. Fuel economy
    2. Collecting all fares
    3. Passenger safety
    4. Saving engine wear

  44. 44.What is the maximum stroke of a standard Type 30 brake chamber?

    1. 2½ inches (65 mm)
    2. 1¾ inches (45 mm)
    3. 1 inch (25 mm)
    4. 4 inches (100 mm)

  45. 45.What must an emergency vehicle give before speeding or going through a red light?

    1. A radio call to police
    2. Proper warning to other drivers
    3. A signal from the dispatcher
    4. Nothing; it may simply proceed

  46. 46.How far from the vehicle it escorts must a pilot car stay?

    1. Between 10 and 50 m
    2. Directly beside it
    3. Between 100 and 500 m
    4. Within 1 km

  47. 47.Below what thickness may a peace officer put a vehicle out of service for drum brake linings?

    1. 1/16 inch (1.6 mm)
    2. 1/2 inch (12.7 mm)
    3. 1/4 inch (6.4 mm)
    4. 1/8 inch (3.2 mm)

  48. 48.How many separate braking systems must every motor vehicle have?

    1. At least two, both air-operated
    2. At least two, one of them mechanical
    3. Three, two of them hydraulic
    4. One, if it has air brakes

  49. 49.A 3.65 m, 600 kg article is not blocked in front. How many tiedowns does it need?

    1. One
    2. Four
    3. Two
    4. Three

  50. 50.What standard must school bus fire extinguishers meet?

    1. ULC Standard 100
    2. ISO 9001
    3. NSC Standard 13
    4. CSA Standard D250

Answer key with explanations

  1. 1. C — Four, each rated at least 2,268 kg

    Vehicles over 4,500 kg carried as cargo need at least four tiedowns each rated at least 2,268 kg. Lighter vehicles need at least two front and two rear.

    Cargo securement · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 108

  2. 2. D — Stop 5 to 15 m away and listen

    A school bus carrying children must stop 5 to 15 m from every uncontrolled main crossing, open the window or door to listen, and not shift gears while crossing.

    School buses · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 6 Skills for driving buses, taxis, limousines and ride-hailing vehicles, p. 53

  3. 3. A — Before applying the trailer brakes

    Drain the trailer air suspension before leaving the trailer parked, before you apply the trailer brakes.

    Coupling and uncoupling · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 86

  4. 4. A — Only buses may go

    A steady white rectangular transit priority signal means only buses may proceed.

    Dangerous goods and signs for commercial drivers · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5, 11 and 13 Dangerous goods, signs and emergencies, p. 245

  5. 5. B — With zero throttle

    Start with zero throttle and do not pump it. Use ether sparingly and only if the owner's manual allows it.

    Fuel-efficient driving · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 4 Fuel-efficient driving, p. 70

  6. 6. D — The compressor keeps making more air

    The compressor replaces air as needed, so small leaks are tolerated. A small leak in a hydraulic system could mean brake failure.

    Air brake components · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 8 Air brakes, p. 145

  7. 7. C — At least 60 m (200 ft)

    Leave at least 60 metres between your large commercial vehicle and other large commercial vehicles on a highway.

    Basic commercial driving skills · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 3 Basic driving skills, p. 31

  8. 8. A — It leaves out the air brake steps

    Code 20 applicants follow the Class 1 pre-trip but leave out the air brake steps, since code 20 vehicles have no air brakes.

    Class 1 pre-trip inspection · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 10 Vehicle and air brake pre-trip inspections, p. 204

  9. 9. A — Blue

    Blue usually marks the control line and red the supply line.

    Tractor-trailer air systems · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 8 Air brakes, p. 168

  10. 10. D — Lag on both application and release

    A relay valve near the chambers takes air from a large supply line and applies it at the foot valve's signal pressure, cutting lag on application and release.

    Dual air brake systems · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 8 Air brakes, p. 159

  11. 11. D — The liquid surges and can tip the vehicle

    Liquid and dry bulk loads have a high centre of gravity, and unbaffled loads surge forward, back and sideways. Slow down on curves and start and stop smoothly.

    Loading and weight distribution · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 109

  12. 12. C — Heavy service braking on top of applied spring brakes

    Compounding is the spring force plus a heavy service application on the same brake parts, up to about 5,000 lb, which can damage slack adjusters, s-cams and drums.

    Spring parking brakes · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 8 Air brakes, p. 164

  13. 13. C — English only, without assistance

    All the knowledge tests in the guide are conducted only in English and must be completed without assistance. Translators are not permitted.

    Licence classes, endorsements and testing · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 1 Getting your driver's licence, p. 9

  14. 14. C — 75 km

    Personal driving is not on duty only if the vehicle is unloaded, tows no trailer, is not used for the carrier, and travels no more than 75 km a day, with odometer readings logged.

    Hours of service · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 7 Hours of service requirements, p. 138

  15. 15. B — When loaded and turning too quickly

    Loaded vehicles roll more easily than empty ones, and rollovers happen when turning too quickly. Rollovers are a major cause of truck driver deaths.

    Backing and handling trailers · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 78

  16. 16. C — Four-tenths of a second

    Air brakes take about 4/10 of a second to work after the pedal is pressed. Perception and reaction time are each about three-quarters of a second.

    Heavy vehicle braking · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 2 Heavy vehicle braking, p. 19

  17. 17. D — No, the minimum age is 19

    Both Class 4 restricted and Class 4 unrestricted require you to be at least 19. Courses, consent or experience do not lower the age.

    Taxis, limousines and ride-hailing · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 6 Skills for driving buses, taxis, limousines and ride-hailing vehicles, p. 3

  18. 18. B — To avoid compounding

    Release the parking brakes before the full application to avoid compounding, with the engine off and at least 100 p.s.i. in the system.

    Air brake pre-trip test · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 10 Vehicle and air brake pre-trip inspections, p. 221

  19. 19. B — Less than 30 minutes

    A Class 2 bus pre-trip should take under 30 minutes, a Class 4 unrestricted bus pre-trip under 20, and a Class 4 restricted vehicle under 15.

    Operating a bus · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 6 Skills for driving buses, taxis, limousines and ride-hailing vehicles, p. 222

  20. 20. B — The brake is badly out of adjustment

    New pushrods have a marking, usually red, that shows when travel is excessive. If it is visible, the brake is dangerously out of adjustment.

    Air brake adjustment · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 9 Air brake adjustment, p. 192

  21. 21. A — When on a call or carrying a patient

    Ambulance drivers use flashing red lights to get the right-of-way only when responding to an emergency call or transporting a patient.

    Ambulances and special vehicles · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 6 Skills for driving buses, taxis, limousines and ride-hailing vehicles, p. 129

  22. 22. D — On any public road

    Portable scales can be set up on any public road, or an inspector's vehicle with flashing lights may pull you over and set up a scale.

    Dimensions, weights and permits · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 115

  23. 23. A — By the first rest stop of each later day

    On trips that last several days, a new report is due no later than the first rest stop of each later day.

    Trip inspections and reports · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 10 Vehicle and air brake pre-trip inspections, p. 201

  24. 24. A — At least 25 cm (10 in)

    Keep at least 25 cm between your breastbone and the steering-wheel airbag to reduce injury if it deploys.

    Tires, warnings and personal safety · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 3 Basic driving skills, p. 62

  25. 25. C — Every vehicle carrying cargo on a highway

    Division 35 and the North American cargo securement standard apply to every vehicle carrying cargo on a highway, whatever its gross vehicle weight.

    Cargo securement · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 94

  26. 26. A — At least 60 m

    Come to a full stop with at least 3 m of road clear on the left, where the bus can be seen from at least 60 m in each direction, and let passengers use the right side only.

    School buses · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 6 Skills for driving buses, taxis, limousines and ride-hailing vehicles, p. 129

  27. 27. C — To ease pressure on the locking jaws

    With trailer brakes set, ease back against the trailer and set the tractor brakes; this takes pressure off the jaws so the release handle pulls easily.

    Coupling and uncoupling · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 85

  28. 28. D — CANUTEC

    For infectious substance spills or a catastrophic cylinder failure, call CANUTEC, the Canadian Transport Emergency Centre, at 613-996-6666 (collect) or *666 by cellphone.

    Dangerous goods and signs for commercial drivers · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5, 11 and 13 Dangerous goods, signs and emergencies, p. 258

  29. 29. B — About half

    At 90 to 100 km/h about half the fuel is used to push through the air, which is why aerodynamic features help.

    Fuel-efficient driving · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 4 Fuel-efficient driving, p. 74

  30. 30. D — ABS has failed, but normal brakes still work

    If the ABS lamp stays on, ABS has failed, but normal air braking still works and the vehicle may be driven to a service depot.

    Air brake components · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 8 Air brakes, p. 185

  31. 31. D — At least 150 m from other vehicles

    Dim to low beam at least 150 metres from vehicles you are approaching or following. High beams light only about 100 m, less than a loaded truck may need to stop at 80 km/h.

    Basic commercial driving skills · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 3 Basic driving skills, p. 56

  32. 32. A — The trailer brakes only

    Tug test 1: release the tractor parking brakes, keep the trailer brakes applied and tug gently in low gear; the trailer brakes must hold. Test 2 does the reverse.

    Class 1 pre-trip inspection · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 10 Vehicle and air brake pre-trip inspections, p. 213

  33. 33. A — At least 15 minutes

    Safety standards require them to stay applied at least 15 minutes, but they hold only while the trailer reservoir keeps pressure; always block the wheels.

    Tractor-trailer air systems · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 8 Air brakes, p. 170

  34. 34. A — Stop air flowing back out of the service tanks

    One-way check valves let air flow from the supply reservoir into the primary and secondary reservoirs but not back, protecting them if the supply side fails.

    Dual air brake systems · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 8 Air brakes, p. 156

  35. 35. B — Partly over or just ahead of the rear axles

    Place it partly over or just ahead of the rear axles, on its longest side, and block it against sliding forward.

    Loading and weight distribution · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 93

  36. 36. B — 1,500 to 2,000 pounds

    The coil spring in most spring brake chambers exerts between 1,500 and 2,000 pounds.

    Spring parking brakes · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 8 Air brakes, p. 161

  37. 37. C — October 18, 2021

    B.C.'s Class 1 Mandatory Entry Level Training became a requirement for all new Class 1 applicants on October 18, 2021.

    Licence classes, endorsements and testing · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 1 Getting your driver's licence, p. 7

  38. 38. A — Commercial vehicles licensed over 5,000 kg GVW

    The NSC covers commercial vehicles licensed over 5,000 kg GVW, vehicles under the Passenger Transportation Act, and commercial vehicles seating 10 or more passengers plus the driver.

    Hours of service · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 7 Hours of service requirements, p. 133

  39. 39. C — The tow bar can fly up and hurt someone

    Unlocking the pintle hook with the dolly still under the rear trailer can make the tow bar fly up and hurt someone.

    Backing and handling trailers · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 79

  40. 40. A — $2,000

    You can be fined as much as $2,000 for operating a vehicle with brakes that are not adjusted correctly or not performing adequately.

    Heavy vehicle braking · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 2 Heavy vehicle braking, p. 23

  41. 41. D — Only in the rear of a sedan built for it

    A jump seat needs a licence or permit under the Passenger Transportation Act and may be used only in the rear of sedans designed by the maker for it.

    Taxis, limousines and ride-hailing · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 6 Skills for driving buses, taxis, limousines and ride-hailing vehicles, p. 124

  42. 42. A — Assume it has not been driven that day

    On the test, assume the vehicle has not been driven that day, and point to or touch each item while saying what you check.

    Air brake pre-trip test · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 10 Vehicle and air brake pre-trip inspections, p. 203

  43. 43. C — Passenger safety

    Passenger safety is always more important than keeping to a schedule.

    Operating a bus · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 6 Skills for driving buses, taxis, limousines and ride-hailing vehicles, p. 120

  44. 44. A — 2½ inches (65 mm)

    A standard Type 30 chamber has a maximum stroke of 2½ inches; a long-stroke Type 30LS has three inches. A correctly adjusted brake strokes less than half its maximum.

    Air brake adjustment · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 9 Air brake adjustment, p. 190

  45. 45. B — Proper warning to other drivers

    An emergency vehicle may exceed limits and go through red lights or stop signs only if it gives other drivers proper warning, using both lights and siren.

    Ambulances and special vehicles · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 6 Skills for driving buses, taxis, limousines and ride-hailing vehicles, p. 130

  46. 46. C — Between 100 and 500 m

    When a permit requires a pilot car, it carries a D sign and must stay 100 to 500 m ahead of or behind the vehicle it escorts.

    Dimensions, weights and permits · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 115

  47. 47. C — 1/4 inch (6.4 mm)

    Drum brake linings under 1/4 inch (6.4 mm), or air disc pads under 1/8 inch (3.2 mm), can put the vehicle out of service.

    Trip inspections and reports · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 10 Vehicle and air brake pre-trip inspections, p. 206

  48. 48. B — At least two, one of them mechanical

    Every motor vehicle needs at least two separate braking systems, and one must be mechanical, such as a ratchet-and-pawl or spring brake.

    Tires, warnings and personal safety · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 3 Basic driving skills, p. 59

  49. 49. D — Three

    Over 3.04 m long means two tiedowns plus one for each additional 3.04 m or part of it, so a 3.65 m article needs three.

    Cargo securement · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 5 Skills for driving trucks and trailers, p. 96

  50. 50. D — CSA Standard D250

    Every school bus needs an approved fire extinguisher that meets CSA Standard D250, plus a first-aid kit and flares or flags.

    School buses · Based on: Driving Commercial Vehicles (ICBC, 2024 edition), Ch. 6 Skills for driving buses, taxis, limousines and ride-hailing vehicles, p. 128

Original practice questions by Canada Exam Prep, written from the official handbook. Not official test questions. Free to print for personal study.

FAQ

BC Class 1–4 questions and answers (printable): common questions

Are these the real BC Class 1–4 test questions?

No. The Insurance Corporation of British Columbia (ICBC) keeps its question bank private. Every question here is original and written from the Driving Commercial Vehicles, the material the real test is based on. Understanding the rules, not memorising answers, is what helps on test day.

How do I save the BC Class 1–4 questions and answers as a PDF?

Press the print button and choose Save as PDF instead of a printer. Menus, buttons and ads are hidden when you print, and the answer key starts on a new page after question 50.

How many questions are on the printable sheet?

50, chosen from all 24 topics in our bank of 318 questions. For more, use the online practice tests, which show the correct answer and an explanation after every question.

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