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BC Air Brake Knowledge Test Practice Questions - British Columbia ICBC Air Brake Knowledge Test Exam
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Question
1
of 25
QUESTION 1 / 25
In British Columbia, what endorsement is normally required to operate an on-highway vehicle equipped with air brakes?
Choose one answer below.
A
A motorcycle endorsement
✓
B
An air brake endorsement, code 15
✓
C
A house trailer endorsement only
✓
D
A passenger vehicle learner licence
✓
QUESTION 2 / 25
For a single-unit on-highway air brake endorsement in B.C., which set of steps best matches ICBC's process?
Choose one answer below.
A
Pass only a road test in any passenger vehicle
✓
B
Complete or qualify for air brake training, pass the knowledge test, and pass an air brake pre-trip test
✓
C
Submit a medical form only; no testing is needed
✓
D
Pass the motorcycle knowledge test and a vehicle inspection
✓
QUESTION 3 / 25
How many questions are on the ICBC air brake knowledge test listed in the ICBC knowledge-test tip sheet?
Choose one answer below.
A
15
✓
B
25
✓
C
35
✓
D
50
✓
QUESTION 4 / 25
What score does ICBC list as passing for the air brake knowledge test?
Choose one answer below.
A
15 correct out of 25
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B
18 correct out of 25
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C
20 correct out of 25
✓
D
24 correct out of 25
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QUESTION 5 / 25
What maximum time allotment does ICBC list for the air brake knowledge test?
Choose one answer below.
A
30 minutes
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B
45 minutes
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C
60 minutes
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D
75 minutes
✓
QUESTION 6 / 25
According to ICBC's fees page, what is the fee for each knowledge-test attempt, including retests after a learner licence expires?
Choose one answer below.
A
Free for everyone
✓
B
$$10
✓
C
$$15, with seniors 65+ free
✓
D
$$50
✓
QUESTION 7 / 25
Which ICBC guide is the official study basis for B.C. air brake endorsement preparation?
Choose one answer below.
A
Learn to Drive Smart only
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B
Driving Commercial Vehicles
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C
Tuning Up for Riders
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D
Towing a Recreational Trailer only
✓
QUESTION 8 / 25
What is the minimum length of an ICBC-approved air brake course?
Choose one answer below.
A
2 hours
✓
B
4 hours
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C
7 hours
✓
D
20 hours
✓
QUESTION 9 / 25
Why are air brakes used on heavy commercial vehicles?
Choose one answer below.
A
They let a driver stop without inspecting brakes
✓
B
They create greater braking force and can replenish compressed air
✓
C
They eliminate brake lag entirely
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D
They make brake adjustment unnecessary
✓
QUESTION 10 / 25
In an air brake system, what does the compressor do?
Choose one answer below.
A
Stores air in the brake drums
✓
B
Pumps and pressurizes air for the system
✓
C
Measures pushrod travel
✓
D
Applies the parking brake spring mechanically
✓
QUESTION 11 / 25
What is the governor's basic job in an air brake system?
Choose one answer below.
A
Control when the compressor pumps or unloads
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B
Keep the brake linings away from the drum
✓
C
Replace the low-air warning device
✓
D
Measure application pressure at the chamber
✓
QUESTION 12 / 25
What is the main purpose of air reservoirs in an air brake system?
Choose one answer below.
A
To cool the brake drums
✓
B
To store compressed air for brake operation
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C
To steer the vehicle during an ABS stop
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D
To adjust the slack adjusters automatically
✓
QUESTION 13 / 25
What does the foot valve do when the driver presses the brake pedal?
Choose one answer below.
A
It directs air pressure to the service brake circuit
✓
B
It drains the wet tank automatically
✓
C
It cages the spring parking brakes
✓
D
It closes the tractor fifth wheel
✓
QUESTION 14 / 25
What are foundation brakes?
Choose one answer below.
A
Only the dashboard controls for the air system
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B
The wheel-end mechanical brake parts operated by the air system
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C
The paperwork required before the road test
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D
Only the compressor and governor
✓
QUESTION 15 / 25
At what pressure level must a low-air warning device activate under the ICBC guide?
Choose one answer below.
A
Below 150 psi
✓
B
Below 125 psi
✓
C
Below 100 psi
✓
D
Below 60 psi
✓
QUESTION 16 / 25
What should a driver do if the low-air warning activates while driving?
Choose one answer below.
A
Continue to the next scheduled stop if the vehicle still moves
✓
B
Stop promptly in a safe place and find the cause before continuing
✓
C
Pump the brakes repeatedly to silence the warning
✓
D
Ignore it if one reservoir gauge still looks normal
✓
QUESTION 17 / 25
What does the reservoir pressure gauge tell the driver?
Choose one answer below.
A
How much air pressure is in the service reservoir system
✓
B
How hot the brake drums are
✓
C
How much tread remains on the tires
✓
D
How far the slack adjuster was turned
✓
QUESTION 18 / 25
How do spring parking brakes apply the brakes?
Choose one answer below.
A
By using mechanical spring force when release air is exhausted or lost
✓
B
By adding engine oil pressure to the drums
✓
C
By requiring the driver to hold the foot valve down
✓
D
By using the ABS computer to lock all wheels
✓
QUESTION 19 / 25
On most vehicles, what does pushing in the yellow parking brake control do?
Choose one answer below.
A
Releases spring parking brakes by sending air to the spring brake chambers
✓
B
Applies spring parking brakes by exhausting air
✓
C
Drains the supply reservoir
✓
D
Turns off the low-air warning device
✓
QUESTION 20 / 25
What is brake lag in an air brake vehicle?
Choose one answer below.
A
The delay between pressing the brake pedal and the brakes beginning to work
✓
B
The time spent draining reservoirs before a trip
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C
The distance between dual tires
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D
The clearance between a fifth wheel and trailer apron
✓
QUESTION 21 / 25
Why does brake lag matter for following distance?
Choose one answer below.
A
It makes the vehicle begin slowing before the driver reacts
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B
It adds distance before the vehicle begins to slow
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C
It cancels perception time
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D
It only matters when parked
✓
QUESTION 22 / 25
What is one key safety advantage of a dual air brake system?
Choose one answer below.
A
It eliminates the need for low-air warnings
✓
B
It can preserve one service brake circuit after a failure in the other circuit
✓
C
It removes all brake lag
✓
D
It makes air reservoirs unnecessary
✓
QUESTION 23 / 25
What do one-way check valves do between the supply reservoir and service reservoirs?
Choose one answer below.
A
Allow air to flow to service reservoirs while preventing backflow after certain upstream failures
✓
B
Reduce tire pressure automatically
✓
C
Replace daily reservoir draining
✓
D
Apply the trailer hand valve
✓
QUESTION 24 / 25
Why should air reservoirs be drained regularly?
Choose one answer below.
A
To remove water, oil, and sludge that can damage or freeze in the system
✓
B
To increase brake lag before starting a trip
✓
C
To make the low-air warning stop working
✓
D
To reduce tire rolling resistance
✓
QUESTION 25 / 25
In an s-cam drum brake, what does the slack adjuster help do?
Choose one answer below.
A
Rotate the s-cam and provide a means to compensate for brake wear
✓
B
Store compressed air for the steering axle
✓
C
Vent air from the compressor discharge line
✓
D
Control the ABS warning lamp
✓
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