CDL AIR BRAKES PRACTICE TEST - MISSISSIPPI

16. The air compressor is connected to:
the suspension system.
the radiator.
the engine.
the transmission.
17. With the controlled braking method, you:
apply the brakes all the way and release brakes when the wheels the lock up.
push down on the brake pedal as hard as you can so that the wheels the lock up.
apply the brakes as hard as you can without locking the wheels.
None of the above.
18. An anti-lock braking system (ABS):
should help you steer around an obstacle while braking.
helps you avoid skids caused by over braking.
helps you avoid wheel lock up.
All of the above.
19. When is it safe to leave your vehicle unattended without applying the parking brakes or chocking the wheels?
When the tank pressure falls to the "cut-in" pressure.
When you are conducting your pre-trip inspection.
Only while you are taking a rest break.
Never.
20. Front brake limiting valves were used to:
prevent overheating of the front tires.
reduce your speed so further braking or shifting is not required.
reduce exhaust emissions.
reduce the chance of the front wheels skidding on slippery surfaces.
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