Final answer:
When measuring crank end play, a technician is least likely to use a micrometer, favoring a dial indicator or feeler gauges instead.
Step-by-step explanation:
When measuring crank end play, it is least likely that a technician would use a micrometer. The tools commonly used for this task are a dial indicator, a pry bar, and sometimes feeler gauges. A dial indicator is used to measure the movement of the crankshaft along the axis of its rotation, which is the end play. A pry bar is often used to gently apply force to the crankshaft to ensure that it is at one end of its possible movement before taking a measurement. Feeler gauges may be used to measure the gap if a precise gap measurement is necessary, but they are not the primary tool for measuring crank end play.
On the other hand, a micrometer is typically used for measuring dimensions of components where outside diameter, inside diameter or thickness is concerned, rather than measuring the play or movement of components in an assembly.