Red Seal Carpenter Practice Exam

A line on a blueprint representing a jog in a wall is drawn 4.25" long. At the scale of Γö¼Γò¥" = 1', how long should the dimension read for this jog?

1. 192"

2. 16'

3. 17"

4. 17 ft

The correct answer is: 17 ft

To determine the correct dimension for the jog in the wall represented on a blueprint, it's essential to first understand the scale indicated: 1/4" = 1'. This means that every quarter inch on the blueprint corresponds to one foot in actual measurements. To find out how long 4.25" on the blueprint translates to the real-world dimension, you start by converting the 4.25" into feet using the scale. Since 1 foot equals 12 inches, you can calculate how many quarter inches fit into 4.25 inches. To make the calculation easier, convert 4.25 inches into quarter-inch increments: - 4.25 inches can be expressed as \( 4.25 \div 0.25 \) (since 0.25 inches is equal to 1/4 inch). - Calculating \( 4.25 \div 0.25 = 17 \). This result signifies that 4.25 inches on the blueprint represents 17 feet in actual length. Therefore, the dimension on the blueprint for the jog in the wall should indeed read 17 feet. This understanding is crucial for interpreting architectural drawings and ensuring accurate measurements in construction, as scales are fundamental for conveying