B.C. Class 1 Knowledge Practice Test 2026: الاختبار التدريبي 5

1. السؤال 1 من 25

   When do you need an air brake endorsement in B.C.?

   • AOnly to drive a bus with air brakes
   • BOnly to drive outside B.C. in another province
   • CTo drive an air-brake vehicle on a highway, except construction vehicles
   • DOnly for vehicles heavier than 63,500 kg
   أظهر الإجابة

   الإجابة: C. To drive an air-brake vehicle on a highway, except construction vehicles

   The endorsement is required to operate air-brake vehicles on a highway, except construction vehicles.

2. السؤال 2 من 25

   How should you apply air brakes for a normal stop?

   • APump the pedal quickly to build air
   • BUse only the trailer hand valve
   • CSmoothly and steadily, easing off as you slow
   • DPress as hard as you can every time
   أظهر الإجابة

   الإجابة: C. Smoothly and steadily, easing off as you slow

   Smooth, steady pressure stops the vehicle without wasting air or locking wheels.

3. السؤال 3 من 25

   What must a low air pressure warning do?

   • AWarn you with a light, buzzer or both when pressure is low
   • BStop the engine so the vehicle cannot move
   • CFill the air tanks from a reserve supply
   • DTurn on the hazard lights for other drivers
   أظهر الإجابة

   الإجابة: A. Warn you with a light, buzzer or both when pressure is low

   The warning tells you pressure is getting low so you can stop safely before the spring brakes apply.

4. السؤال 4 من 25

   On a tractor-trailer, what colour is the gladhand for the service (control) line?

   • ARed
   • BYellow
   • CBlack
   • DBlue
   أظهر الإجابة

   الإجابة: D. Blue

   The service line is usually blue, and the supply (emergency) line is red.

5. السؤال 5 من 25

   You drive through deep water. What should you do afterward?

   • ABrake lightly for a short distance to dry the brakes
   • BDrain the air tanks right away at the roadside
   • CSpeed up so the wind dries the brakes
   • DPump the brakes hard several times at speed
   أظهر الإجابة

   الإجابة: A. Brake lightly for a short distance to dry the brakes

   After driving through water, use light brake pressure for a short distance to dry the brakes.

6. السؤال 6 من 25

   What does the tractor protection system do if the trailer breaks away?

   • AKeeps the tractor's air, while the trailer's spring brakes apply
   • BIt speeds the tractor up to get clear of the trailer
   • CIt turns on the trailer lights to warn others
   • DIt releases all of the tractor's brakes
   أظهر الإجابة

   الإجابة: A. Keeps the tractor's air, while the trailer's spring brakes apply

   The tractor keeps its air supply, and the trailer brakes apply when its air is lost.

7. السؤال 7 من 25

   Do vehicles with air-over-hydraulic brakes need the air brake endorsement in B.C.?

   • ANo, never
   • BYes, most of them do
   • COnly school buses
   • DOnly if they are over 30 years old
   أظهر الإجابة

   الإجابة: B. Yes, most of them do

   The endorsement is also required for most air-over-hydraulic vehicles.

8. السؤال 8 من 25

   What is at the bottom of each air tank?

   • AA pressure gauge
   • BA fuel filter
   • CA drain valve
   • DA brake shoe
   أظهر الإجابة

   الإجابة: C. A drain valve

   Each tank has a drain valve to remove water and oil.

9. السؤال 9 من 25

   What happens after three failed attempts at the air brake knowledge test in B.C.?

   • AYou must take a road test instead
   • BYou can never take the test again
   • CYou must wait 5 years to try again
   • DYou must complete or repeat a 7-hour course
   أظهر الإجابة

   الإجابة: D. You must complete or repeat a 7-hour course

   After three failures, you must complete or repeat a 7-hour air brake course.

10. السؤال 10 من 25

    On a downgrade your speed creeps above your safe speed. When should you brake to bring it down by 10 to 15 km/h?

    • ANever; use only the gears
    • BOnly after the brakes start to smell
    • COnly at the bottom of the hill
    • DRight away, while the brakes are still cool
    أظهر الإجابة

    الإجابة: D. Right away, while the brakes are still cool

    ICBC advises braking hard enough to cut 10 to 15 km/h while the brakes are still cold, then shifting to a lower main gear.

11. السؤال 11 من 25

    Why must you not apply the service brakes hard while the spring brakes are on?

    • ABecause it is the best way to park on a steep hill
    • BBecause it cools the brakes far too quickly
    • CBecause it uses no air at all from the tanks
    • DThe combined forces can overload and damage brake parts
    أظهر الإجابة

    الإجابة: D. The combined forces can overload and damage brake parts

    Applying full service air on top of applied spring brakes can over-stress the brake parts.

12. السؤال 12 من 25

    What does the brake pedal (foot valve) do in an air brake system?

    • AIt pumps air into the tanks
    • BIt releases air from the tires
    • CIt switches the compressor on
    • DIt sends air from the tanks to the brake chambers
    أظهر الإجابة

    الإجابة: D. It sends air from the tanks to the brake chambers

    Pressing the pedal opens the foot valve, which sends air to the brake chambers.

13. السؤال 13 من 25

    In the cab, how can you recognise the trailer supply control?

    • AA black dial
    • BA yellow, diamond-shaped knob
    • CA blue, square knob
    • DA red, eight-sided push-pull knob
    أظهر الإجابة

    الإجابة: D. A red, eight-sided push-pull knob

    The trailer supply (tractor protection) control is a red, eight-sided knob.

14. السؤال 14 من 25

    How long is a certified air brake course in B.C.?

    • A1 hour of online video, with no practical training
    • B40 hours of classroom theory over two weeks
    • C7 hours of classroom theory and 4 hours of practical training
    • D2 weeks of driving on the road with a trainer
    أظهر الإجابة

    الإجابة: C. 7 hours of classroom theory and 4 hours of practical training

    A certified course has 7 hours of classroom theory and 4 hours of practical training.

15. السؤال 15 من 25

    What is the first step to get an air brake endorsement in B.C.?

    • AComplete an air brake course
    • BGet a medical exam
    • CBook a road test
    • DBuy a truck with air brakes
    أظهر الإجابة

    الإجابة: A. Complete an air brake course

    The steps are: complete an air brake course, study, apply and take the knowledge test, then pass the air brake pre-trip inspection test.

16. السؤال 16 من 25

    While driving, your low air pressure light and buzzer come on. What is the right action?

    • APull over and stop safely as soon as possible
    • BSpeed up to reach the next town sooner
    • CPump the brake pedal to build up air
    • DKeep driving to the end of your shift
    أظهر الإجابة

    الإجابة: A. Pull over and stop safely as soon as possible

    Low air means you are losing braking ability. Stop safely and find the cause.

17. السؤال 17 من 25

    Why is a spring brake chamber dangerous to open?

    • AIt contains hot oil under pressure
    • BOpening it cancels your licence
    • CIt has no parts that can be serviced
    • DThe spring is under great force and could injure you
    أظهر الإجابة

    الإجابة: D. The spring is under great force and could injure you

    The spring in the chamber is under great force. Only trained people with the right tools should service it.

18. السؤال 18 من 25

    Which low air warning device is a mechanical arm that drops into view?

    • AA wig wag
    • BA slack adjuster
    • CA governor
    • DA gladhand
    أظهر الإجابة

    الإجابة: A. A wig wag

    A wig wag is a mechanical warning arm that drops into view when pressure falls too low.

19. السؤال 19 من 25

    What should you watch on the gauge while the engine builds air?

    • AThat pressure drops while the engine runs
    • BThat the fuel gauge rises with the air pressure
    • CThat the needle stays at zero until you drive
    • DSteady pressure build-up and cut-out at the right pressure
    أظهر الإجابة

    الإجابة: D. Steady pressure build-up and cut-out at the right pressure

    Pressure should build at a normal rate and the governor should stop the compressor at the cut-out pressure.

20. السؤال 20 من 25

    Which mix of things requires the most stopping power?

    • ADouble the speed and double the weight
    • BDouble the weight only
    • CDouble the speed only
    • DHalf the speed and double the weight
    أظهر الإجابة

    الإجابة: A. Double the speed and double the weight

    Doubling both speed and weight needs eight times the stopping power.

21. السؤال 21 من 25

    What protects the air tanks from too much pressure?

    • AThe safety valve
    • BThe slack adjuster
    • CThe low air warning
    • DThe brake drum
    أظهر الإجابة

    الإجابة: A. The safety valve

    If pressure gets too high, the safety valve lets air out.

22. السؤال 22 من 25

    In B.C., which code on your licence shows the air brake endorsement?

    • ACode 7
    • BCode 5
    • CCode 20
    • DCode 15
    أظهر الإجابة

    الإجابة: D. Code 15

    The air brake endorsement is code 15.

23. السؤال 23 من 25

    After passing the air brake knowledge test, what practical test must you pass in B.C.?

    • AA parallel parking test with a trailer
    • BThe air brake pre-trip inspection test
    • CA night driving test on a highway
    • DA two-hour road test in traffic
    أظهر الإجابة

    الإجابة: B. The air brake pre-trip inspection test

    You book and pass an air brake pre-trip inspection test. No road test is required for the endorsement.

24. السؤال 24 من 25

    What happens to the spring brakes if the air system loses all its pressure?

    • AThey apply
    • BThey stay exactly as they were
    • CThey switch to hydraulic power
    • DThey release
    أظهر الإجابة

    الإجابة: A. They apply

    Loss of air pressure lets the springs apply the brakes. This is a safety feature.

25. السؤال 25 من 25

    How does a non-certified air brake course differ from a certified one in B.C.?

    • AIt is taught only in a truck, with no theory
    • BIt includes a road test in traffic
    • CIt is longer, with extra classroom days
    • DIt has only the 7 hours of classroom theory
    أظهر الإجابة

    الإجابة: D. It has only the 7 hours of classroom theory

    A non-certified course has 7 hours of classroom theory without the practical training.

لوحة المفاتيح: 1–4 للإجابة، وEnter للسؤال التالي.