Technician A says that a dial indicator is zeroed by turning the outer face. Technician B says that a dial indicator plunger should be 90 degrees to the surface being measured. Who is correct?

A. Technician A
B. Technician B
C. Both Technician A and Technician B
D. Neither Technician A nor Technician B

Both Technician A and Technician B are correct about the dial indicator. A dial indicator is zeroed by adjusting the outer face, and its plunger must be at a right angle to the measured surface for accuracy. Therefore, the answer is that both technicians are correct.

Explanation:

Understanding Dial Indicators

In the context of dial indicators, Technician A is correct in saying that the outer face can be turned to zero the instrument; this adjustment is essential for accurate readings, allowing the user to set a baseline measurement from which to gauge variations in the material or surface being measured.

However, Technician B is also correct in stating that the plunger of a dial indicator should be oriented at a 90 degrees angle to the surface being measured. This positioning ensures the most accurate measurement by preventing any angular distortion from affecting the reading.

Thus, the correct answer is c. Both Technician A and Technician B. Both technicians provide accurate information regarding the proper use of the dial indicator.

Learn more about Dial Indicator Usage here:

https://brainly.com/question/33601944