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Question 1

50% answer correctly

Modulating control valves are used to:

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

Question 2

76% answer correctly

For air brakes, the cut-out level is:

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

Question 3

56% answer correctly

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

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