Intro to Millwright Practice Exam

In a 60 degree sling angle, what is the relationship between the distance between the two attachment points and the sling length?

1. Distance is double the sling length

2. Distance is equal to the sling length

3. Distance is half the sling length

4. Distance can vary regardless of sling length

The correct answer is: Distance is equal to the sling length

In a scenario where a sling is used at a 60-degree angle, the relationship between the distance between the two attachment points and the sling length can be understood through the principles of geometry and trigonometry. When the sling is positioned at this angle, it forms an equilateral triangle between the attachment points and the vertical line from the load. In this configuration, the length of the sling serves as the hypotenuse of a right triangle where the horizontal component relates directly to the distance between the two attachment points on the load. For a 60-degree angle, the horizontal distance can be calculated using the cosine function, specifically noting that the distance between the two attachment points is equal to the length of the sling when multiplied by cosine of 60 degrees. Since the cosine of 60 degrees is 0.5, this results in the distance being determined as half of the sling length when evaluated over the total span between the two points. This geometrical interpretation aids in visualizing that the distance is effectively equal to the sling length itself. Thus, when understanding the properties of triangles and the horizontal distance connected to the angle of the sling, the relationship affirms that the distance is equal to the length of the sling in this specific scenario.