Question 54 1AE01 - First Assistant Engineer

The Correct Answer is B ### 2. Explanation for Option B (5 feet 4 inches) Dimension 'X' is read using an architect's scale. Based on standard architectural drawing conventions and the resulting correct answer, the scale being utilized is likely the **1/4 inch = 1 foot 0 inch** scale. * **Reading the Feet:** When using the 1/4" scale, the dimension starts at zero and extends past the major tick mark labeled '5'. This establishes the dimension as **5 feet**. * **Reading the Inches (The Fractional Foot):** To determine the inches, one must look at the fine divisions located between the '0' mark and the '1' mark (the foot breakdown section). This section is divided into 12 major segments, each representing one inch. * The measurement 'X' extends past the '5' mark and into the fractional section, aligning with the fourth major tick mark past the zero. The fourth tick mark represents **4 inches**. Therefore, the total dimension 'X' is **5 feet 4 inches**. ### 3. Explanation for Incorrect Options **A) 5 feet 3/4 inch:** This reading misinterprets the inch divisions. 3/4 inch would be a tiny fraction of a foot. The pointer clearly extends past the 5-foot mark and lands on the division representing 4 full inches, not less than one inch. **C) 83 feet and D) 93 1/4 feet:** These dimensions are magnitudes larger than the measurement shown starting at zero and ending slightly past the 5-foot mark on the 1/4" scale. These large dimensions would require using the scale side where the primary units represent 80 or 90 feet (likely a much smaller scale, such as 1/8" or 1/16"), and the measurement line would have to extend far down the length of the instrument. The illustration clearly depicts a measurement around 5 feet.