SkillsUSA CNC Milling Practice Exam 2025 – Complete Preparation Resource

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If a part print calls for a finished length of 2.025" and requires leaving 0.100" for machining operations, what is the minimum stock length needed?

2 1/4"

2 1/8"

To determine the minimum stock length required for the machining operation, you need to account for both the finished length of the part and the additional material set aside for machining. The finished length specified is 2.025 inches, and you need to leave 0.100 inches for machining operations.

To find the minimum stock length, add the finished length to the material reserved for machining:

2.025 inches (finished length) + 0.100 inches (material for machining) = 2.125 inches.

When converting 2.125 inches to a fractional format, it is equivalent to 2 1/8 inches. This value represents the least amount of material required to ensure the finished part can be accurately machined while still allowing for the necessary adjustments during the machining process.

Thus, choosing 2 1/8 inches as the minimum stock length effectively meets the requirement by providing adequate material for both the finished product and the machining allowance.

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2"

2 3/8"

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