BC Class 3 Practice Test · Question
When performing a pre-trip inspection, what is the minimum air pressure required in an air brake system before the driver can safely operate the vehicle?
The air brake system must build to at least 600 kPa (87 psi) in the primary and secondary reservoirs before the vehicle can be safely operated, ensuring proper
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Question: When performing a pre-trip inspection, what is the minimum air pressure required in an air brake system before the driver can safely operate the vehicle?
Answer options:
- 50 psi (345 kPa)
- 70 psi (480 kPa)
- 80 psi (550 kPa) ✅ At least 600 kPa (87 psi) for most systems
Correct answer: At least 600 kPa (87 psi) for most systems
Explanation: The air brake system must build to at least 600 kPa (87 psi) in the primary and secondary reservoirs before the vehicle can be safely operated, ensuring proper brake function. (Provincial Driver's Handbook, Air Brake Endorsement section)
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