Question

Match the operation/phenomenon in a grinding process with the corresponding definition listed in the table. 

• A. \( P \to 4, Q \to 1, R \to 3, S \to 2 \)
• B. \( P \to 2, Q \to 3, R \to 1, S \to 4 \)
• C. \( P \to 2, Q \to 4, R \to 1, S \to 3 \)
• D. \( P \to 4, Q \to 3, R \to 1, S \to 2 \)

Hint:

Understanding the difference between dressing and truing is key in grinding operations: dressing restores the sharpness, while truing ensures the wheel is geometrically true.

Answer 1

The Correct Option is C

Let us match each operation/phenomenon with the appropriate definition:
Loading (P): Loading refers to the condition where the grinding wheel becomes filled with grinding chips, which leads to a loss of sharpness. This corresponds to "Filling of grinding chips in the space between the abrasive grits" (Definition 2).
Glazing (Q): Glazing occurs when the grinding wheel becomes dull and smooth due to worn-out grains, affecting its efficiency. This matches with "Condition of dull grinding wheel with worn-out grains" (Definition 4).
Dressing (R): Dressing is the process used to restore the geometry and sharpness of the grinding wheel. It corresponds to "Restoring the geometry/shape of the grinding wheel" (Definition 1).
Truing (S): Truing refers to the process of regenerating the sharpness of the grinding wheel by removing any irregularities, so it becomes geometrically true again. This corresponds to "Regenerating the sharpness of the grinding wheel" (Definition 3).
So, the correct matching is:
\[ P \to 2, Q \to 4, R \to 1, S \to 3. \]