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Question 1

69% answer correctly

If the air compressor stops working, air brakes:

	Cannot be used
	Immediately fail
	Can still be used several times
	Can be used indefinitely

Question 2

43% answer correctly

For vehicles that use air brakes, emergency and parking brakes:

	Must be mechanical brakes
	Are not required
	Can only be air brakes
	Must be a combination of mechanical and air brakes

Question 3

43% answer correctly

For vehicles that use air brakes, emergency and parking brakes:

	Are not required
	Must be a combination of mechanical and air brakes
	Can only be air brakes
	Must be mechanical brakes