What type of scale is indicated at II in Figure 313-11?

The correct answer identifies the scale as an Engineer's scale. An Engineer's scale is specifically designed for use in technical drawings and construction documents, allowing for precise measurements and conversions of feet and inches. This scale typically features a variety of divisions, with each side marked in different increments, allowing for accurate scaling of plans and elevations.

Engineer’s scales are commonly used in civil engineering, surveying, and other related fields where making accurate measurements is essential. They may often be used in conjunction with plans that are intended for construction, making it easier for engineers and contractors to quickly interpret measurements without conversion.

In contrast, an Architect's scale is used primarily for architectural drawings and is calibrated differently, while a Metric scale is based on the metric system and is often employed in contexts that require metric measurements. A Graphic scale is a visual aid that allows for direct measurement from the drawing itself but does not rely on standard units like the other types of scales. Understanding the specific application of each type of scale is crucial for accurately interpreting engineering and architectural plans.