Ontario Air Brake Practice · Question
When performing a functional test of the low air pressure warning system, at what approximate pressure should the warning buzzer and light activate when the engine is off and the service brake is applied repeatedly?
The low air pressure warning system (buzzer and light) must activate when the air pressure in the service reservoirs drops below 414 kPa (60 psi). This is a cri
Start free practice for Ontario Air Brake Practice
40 questions · no signup required · 40 free questions per day
Question: When performing a functional test of the low air pressure warning system, at what approximate pressure should the warning buzzer and light activate when the engine is off and the service brake is applied repeatedly?
Answer options: ✅ Below 414 kPa (60 psi)
- Below 552 kPa (80 psi)
- Below 689 kPa (100 psi)
- Above 207 kPa (30 psi)
Correct answer: Below 414 kPa (60 psi)
Explanation: The low air pressure warning system (buzzer and light) must activate when the air pressure in the service reservoirs drops below 414 kPa (60 psi). This is a critical threshold to ensure the driver is alerted before brake effectiveness is significantly compromised.
Start free practice for Ontario Air Brake Practice
40 questions · no signup required · 40 free questions per day
More about Ontario Air Brake Practice
Related Questions
- Scenario 36: The main advantage of air brakes over hydraulic brakes is:
- Scenario 1: The main advantage of air brakes over hydraulic brakes is:
- Scenario 71: The main advantage of air brakes over hydraulic brakes is:
- Scenario 106: The main advantage of air brakes over hydraulic brakes is:
- Scenario 141: The main advantage of air brakes over hydraulic brakes is:
- Scenario 176: The main advantage of air brakes over hydraulic brakes is:
More for Ontario Air Brake Practice candidates
Study guides
Question explanations
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Ontario Air Brake Practice Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.