Question

two technicians are discussing the correct procedure for cleaning a rotor after machining. technician a says that brake cleaner is the best way to remove all of the metal dust and debris from the rotors surface. technician b says that brake cleaner works very well at removing grease and oil from the rotors surface. who is correct?
technician a
technician b
both technician a and technician b
neither technician a nor technician b

Explanation:

Brake cleaner is effective at removing both metal dust/debris and grease/oil from rotor surfaces. Technician A's claim about removing metal - dust and debris and Technician B's claim about removing grease and oil are both correct.

Answer:

C. Both Technician A and Technician B