Millwright Level 1 Practice Exam

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In finishing processes, what is the typical feed rate?

0.001-0.002 inches per revolution
0.003-0.004 inches per revolution
0.002-0.005 inches per revolution
0.005-0.008 inches per revolution

The correct answer is: 0.002-0.005 inches per revolution

In finishing processes, a feed rate of 0.002-0.005 inches per revolution is generally considered appropriate due to the nature of these operations. During finishing, the objective is to achieve a smooth and precise surface finish, which requires slower feed rates. This range allows for better control over the cutting tool's engagement with the material, resulting in finer surface textures and improved dimensional accuracy. Higher feed rates could lead to less effective machining, as the tool may remove material too quickly, compromising the quality of the finish. Conversely, feed rates below this range could also be inefficient, resulting in longer operation times without significant benefit to the surface quality. Therefore, the range of 0.002-0.005 inches per revolution is widely recognized as a balance that optimizes machining speed while ensuring quality results in finishing applications.