Class 1 Commercial Driver Practice · Question
Before starting a trip, a Class 1 driver must complete a pre-trip inspection. What critical component of the air brake system must be checked for proper operation and air pressure build-up?
A thorough pre-trip inspection includes verifying the air compressor's operation and ensuring the governor cuts out at the specified pressure, typically between
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Question: Before starting a trip, a Class 1 driver must complete a pre-trip inspection. What critical component of the air brake system must be checked for proper operation and air pressure build-up?
Answer options:
- The windshield wiper fluid reservoir ✅ The air compressor and governor cut-out pressure
- The horn and interior lights
- The fuel tank level
Correct answer: The air compressor and governor cut-out pressure
Explanation: A thorough pre-trip inspection includes verifying the air compressor's operation and ensuring the governor cuts out at the specified pressure, typically between 827 kPa (120 psi) and 965 kPa (140 psi), to ensure the air brake system is functional. This is a key safety check for air brake equipped vehicles.
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Question explanations
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