I have been using the practice test listed above, along with the Minnesota CDL booklet to practice for my CDL and airbrakes test, which I am going to take this morning. I hope to attain my CDL permit, and will post my results.
General knowledge questions,I missed on the practice test:
- half hour before sunset and sunrise - vehicle lights must be on. I thought new trucks had daytime running lights just like regular vehicles.
- Blood alcohol content of .02, placed out of service for 24 hrs.
- Checking air seat is not part of the pre-trip
- hold hands on opposite side of the wheel. I was thinking ten and two towards the top.
- look 12-15 seconds ahead
air brake test questions I missed on the online practice test:
- when going down a long steep grade, you should release the brake when you are 5MPH below your safe speed
- the brake drums must not have any cracks longer than half the width of the friction area.
- the safety valve in the air compressor tank is set to open at 150 psi
- to check the governor on the air compressor tank cut in and cut out do all of the following: run the engine at a fast idle, step on and off the pedal, and monitor the pressure gauge
- dual air brake system has two air brake systems and one set of controls
- the air compressor is connected to the engine through gears and a v belt
- the braking power of the spring brakes depends on the adjustment of the service brakes
- air compressor one way check valve keeps air in the tank if a leak develops
- S cam brakes are the most common on commercial vehicles
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