BC Class 1–4 Practice Test 7

All 30 questions in this test

Every question and its answer choices. The correct answers and explanations appear when you take the test above.

1. An article is 2.5 m long and is not blocked in front. How many tiedowns does it need?

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

2. What is the maximum height of a commercial vehicle in B.C. without an oversize permit?

   1. 3.9 m
   2. 4.0 m
   3. 4.15 m
   4. 4.4 m

3. What shape and colour is most trailer air supply valves?

   1. A blue circle
   2. A yellow diamond
   3. A green square
   4. A red octagon

4. What is the purpose of a quick release valve?

   1. To fill the trailer reservoirs
   2. To apply the brakes faster in an emergency
   3. To lock the brakes when parked
   4. To exhaust air close to the chambers

5. What should you do after driving through deep water?

   1. Hold light brake pressure briefly
   2. Pump the brakes hard several times to dry them
   3. Stop and wait for the brakes to dry
   4. Nothing; air brakes are not affected

6. A passenger van seats 11 including the driver. Which equipment must it carry?

   1. An emergency exit door, but no other equipment
   2. Only a spare tire
   3. Nothing beyond seatbelts
   4. A first-aid kit, spare tire and extinguisher

7. 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

8. With an air dryer fitted, should you still drain the reservoirs?

   1. Only if the dryer fails
   2. Only in summer
   3. Yes, regularly
   4. No, never

9. What is the maximum drawbar length, unless towing a pole trailer?

   1. Seven metres
   2. Ten metres
   3. Five metres
   4. Three metres

10. Before working underneath the vehicle during an inspection, what should you do?

    1. Release the parking brakes
    2. Take the keys out of the ignition
    3. Start the engine to build air
    4. Remove the wheel blocks

11. What is the minimum age for a B.C. Class 1 licence?

    1. 18
    2. 21
    3. 19
    4. 16

12. Which reservoir must be drained on the road test?

    1. The secondary reservoir only
    2. The trailer reservoir only
    3. None; draining is optional
    4. The supply (wet) reservoir

13. The foot valve sends a 20 p.s.i. signal to a relay valve. What pressure does the relay valve deliver to the chambers?

    1. About 100 p.s.i.
    2. About 40 p.s.i.
    3. About 20 p.s.i.
    4. About 10 p.s.i.

14. How many people must a vehicle seat, including the driver, to be a bus?

    1. More than 15
    2. More than 25
    3. More than 10
    4. More than 6

15. On an evenly loaded tractor-semitrailer, about what share of cargo weight is on the steering axle?

    1. About 1 per cent
    2. About 10 per cent
    3. About 25 per cent
    4. About 45 per cent

16. What is blended air in a dual system?

    1. Air from the compressor and the wet tank
    2. Parking control fed by the higher reservoir
    3. Air shared between tractor and trailer
    4. Air mixed with alcohol vapour to stop freezing

17. What following distance should a taxi keep behind a motorcycle?

    1. Exactly two seconds
    2. One second
    3. More than two seconds
    4. Five seconds behind its lane

18. Which vehicle must stop at every uncontrolled main railway crossing in B.C.?

    1. A taxi carrying passengers
    2. A dump truck carrying gravel
    3. An empty flat-deck trailer
    4. A bus carrying passengers

19. What is meant by "dynamiting" the trailer brakes?

    1. Pumping the trailer brakes quickly on a slippery road
    2. Full brake application when supply air is lost
    3. Overheating the brakes on a hill
    4. Releasing the brakes with the hand valve

20. How tall must the letters on a "School Bus" sign be?

    1. At least 20 cm
    2. At least 15 cm
    3. At least 10 cm
    4. At least 30 cm

21. What must you do before caging a spring brake?

    1. Release the service brakes
    2. Drain the wet tank
    3. Block the wheels
    4. Start the engine

22. Why can a poorly adjusted brake fail on a long downgrade even if it seemed fine when cool?

    1. The linings swell and lock
    2. The slack adjuster tightens itself
    3. Hot air raises system pressure past the safety valve
    4. Hot drums expand and the chamber bottoms out

23. Which tire tread is more fuel-efficient on drive and steer axles?

    1. Mud-and-snow tread
    2. Rib tread
    3. Lug tread
    4. Mixed tread on each axle

24. What can happen if a heavy load is placed at the very back of a truck?

    1. The front tires overheat and wear quickly
    2. Braking improves
    3. The truck uses less fuel
    4. Steering becomes very difficult

25. How many past days of records of duty status must you carry, besides today's?

    1. The previous 30 days
    2. Only today's record
    3. The previous 7 days
    4. The previous 14 days

26. What may rust streaks on a wheel rim mean?

    1. The tire is overinflated
    2. A loose lug nut or a cracked rim
    3. The brakes are well adjusted
    4. The wheel was recently painted

27. Whom does a taxi driver have a duty to carry?

    1. Only customers going downtown
    2. All paying customers
    3. Only pre-booked customers
    4. Anyone the driver chooses

28. Before backing under a trailer, how should the fifth wheel be positioned?

    1. Level, with the jaws closed
    2. Tilted down toward the rear with jaws open
    3. Raised fully with the release handle locked
    4. Tilted up toward the cab with jaws open

29. How do you check the breakaway system of a trailer with electric brakes?

    1. Disconnect the tractor battery and wait one minute
    2. Pull the breakaway pin; brakes must apply
    3. Drive and brake hard at speed
    4. Spray water on the brake magnets

30. How do you get more braking from the foot valve?

    1. Press the pedal farther
    2. Press harder without moving it
    3. Pump it quickly
    4. Hold it halfway and wait