Following an Installation of a Rebuilt Engine, a Technician Breaks

Multiple Choice

Following an installation of a rebuilt engine, a technician breaks in the engine by accelerating from 45 mph to 55 mph and coasting back to 45 mph several times. During this process, which of the following is/are true?

A) Rings are pushed against the cylinder walls under pressure conditions.
B) Rings are pushed against the cylinder walls under vacuum conditions.
C) Oil is drawn onto the cylinder walls during deceleration to prevent scuffing.
D) All of the above
E) None of the above