ASE S4 Brakes (School Bus) Practice Questions - ASE S4 - Brakes (School Bus) Certification Exam

The air compressor governor on a school bus is responsible for which function?

Metering air to the front service brakes during a stop Controlling compressor loaded/unloaded operation by cycling the unloader at cut-in and cut-out pressures Protecting the secondary reservoir if the primary circuit fails Limiting brake chamber pushrod travel as linings wear

Correct Answer:

Controlling compressor loaded/unloaded operation by cycling the unloader at cut-in and cut-out pressures

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