Class 3 Commercial Driver Practice · 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
Start free practice for Class 3 Commercial Driver Practice
300 questions · no signup required · 40 free questions per day
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)
Start free practice for Class 3 Commercial Driver Practice
300 questions · no signup required · 40 free questions per day
More about Class 3 Commercial Driver Practice
Related Questions
- When driving a straight truck, how should you pass a pedestrian walking on the shoulder of the road without a
- Scenario 1: Tare weight refers to:
- Scenario 2: Gross combination weight (GCW) is:
- Scenario 3: A retarder on a heavy truck is used to:
- Scenario 4: An e-log (ELD) records:
- Scenario 5: A truck's 'fifth wheel' is:
More for Class 3 Commercial Driver Practice candidates
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Class 3 Commercial Driver Practice Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.