Technician A says the setup shown in the following figure is being used to check drum internal diameter. Technician B says the setup shown in the following figure is being used to check for an out-of-round drum. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. The setup shown in the figure is used to check both the internal diameter and out-of-roundness of the drum. The two dial indicators are placed opposite each other to measure both the smallest and largest diameter of the drum at the same time. Any difference in the readings will indicate out-of-roundness. Therefore, both A and B are correct.

Technician a Says the Setup Shown in the Following Figure