NCCER Millwright Practice Exam

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Study for the NCCER Millwright Exam. Empower your knowledge with quizzes that enhance understanding, and multiple-choice questions that provide hints and explanations. Get fully prepared and ace your exam!

Practice this question and more.

The term 'marring' is commonly associated with which operation?

Welding
Drilling
Pressing
Cutting

The correct answer is: Pressing

The term 'marring' refers to the process of causing marks or scratches on a surface, which can occur during various operations. In the context of operations related to millwrighting, pressing is particularly prone to creating marring, especially if the materials being pressed are not aligned properly or if the pressure is applied unevenly. During pressing, the tooling and the workpiece are in contact, and if there is a lack of adequate lubrication or if the surfaces are not properly prepared, the pressure can cause abrasions or indentations. This can result in visible imperfections on the material, which is what is meant by 'marring.' While welding, drilling, and cutting can also lead to surface imperfections, marring is specifically linked to the surface damage that occurs directly from the pressing action, making it the most relevant operation when discussing this term.