To indicate an angled surface and make that surface parallel to a surface plate, the machinist would use a ______.

To indicate an angled surface and make that surface parallel to a surface plate, the machinist would use a ______.

• A. Flat plate
• B. Sine plate
• C. Leveling device
• D. Calibration tool

Answer: (B)

The sine plate is specifically designed to facilitate the setting of workpieces at precise angles. It allows machinists to create and maintain an inclined or angled surface, which can then be aligned with a surface plate for maximum accuracy during machining processes. The sine plate operates by using sine principles, where the angle is determined by the height of a wedge placed between the workpiece and the base of the sine plate. This setup ensures that the surface being machined is parallel to the reference surface of the plate, allowing for precise angle measurements and cuts. In contrast, other options like a flat plate primarily provide a flat surface but do not accommodate angled settings. A leveling device is typically used to ensure that a surface is horizontal or vertical rather than to set an angle. Calibration tools are more focused on measuring or adjusting equipment to ensure it operates accurately, rather than aligning workpieces at a specific angle. Therefore, the sine plate is the most suitable choice for the task of setting an angle parallel to a surface plate.

The sine plate is specifically designed to facilitate the setting of workpieces at precise angles. It allows machinists to create and maintain an inclined or angled surface, which can then be aligned with a surface plate for maximum accuracy during machining processes. The sine plate operates by using sine principles, where the angle is determined by the height of a wedge placed between the workpiece and the base of the sine plate. This setup ensures that the surface being machined is parallel to the reference surface of the plate, allowing for precise angle measurements and cuts.

In contrast, other options like a flat plate primarily provide a flat surface but do not accommodate angled settings. A leveling device is typically used to ensure that a surface is horizontal or vertical rather than to set an angle. Calibration tools are more focused on measuring or adjusting equipment to ensure it operates accurately, rather than aligning workpieces at a specific angle. Therefore, the sine plate is the most suitable choice for the task of setting an angle parallel to a surface plate.