technician a says the primary shoe of the duo - servo drum brake system is self - energized by the rotation…

technician a says the primary shoe of the duo - servo drum brake system is self - energized by the rotation of the drum and this causes the secondary shoe to self - energize as well. technician b says the duo - servo drum brake system is more effective and durable than the leading - trailing brake system. who is correct? a) technician a b) technician b c) both technician a and b d) neither technician a or b

technician a says the primary shoe of the duo - servo drum brake system is self - energized by the rotation of the drum and this causes the secondary shoe to self - energize as well. technician b says the duo - servo drum brake system is more effective and durable than the leading - trailing brake system. who is correct? a) technician a b) technician b c) both technician a and b d) neither technician a or b

Answer

Brief Explanations:

  • Technician A: In a duo - servo drum brake system, when the drum rotates, the primary shoe is self - energized. The movement of the primary shoe then causes the secondary shoe to also be self - energized. This is a correct statement about the operation of the duo - servo drum brake system.
  • Technician B: The duo - servo drum brake system has a more effective braking action due to the self - energizing of both shoes. Also, because of the way the forces are distributed and the design, it can be more durable compared to the leading - trailing brake system. This is also a correct statement.

Answer:

C. Both Technician A and B