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Question 1

50% answer correctly

Modulating control valves are used to:

	Switch between spring and air brakes
	Apply the spring brakes gradually
	Apply the air brakes gradually
	Apply the spring and air brakes together

Question 2

76% answer correctly

For air brakes, the cut-out level is:

	The minimum air pressure for the air storage tanks
	The level at which the air compressor will start pumping air into the air storage tanks
	The average air pressure maintained in the air storage tanks
	The level at which the air compressor will stop pumping air into the air storage tanks

Question 3

56% answer correctly

You should be in the proper gear before starting down a hill because:

	To keep the brakes cool
	It`s difficult to change gears while going downhill
	To keep your speed under control
	The use of brakes is only a supplement to the braking effect of the engine