The height of the ? above the ground is one of the three factors that need to be considered when guying a pole line.

• A. Crossarm
• B. Guy attachment
• C. Secondary service
• D. Transformer bank

Answer: (B)

The height of the guy attachment above the ground is a key factor because it directly sets the angle and direction of force that the guy wire exerts on the pole and its anchor. Where the wire is attached determines how much of the pull is horizontal versus vertical. If the attachment is too high, the pull becomes more vertical, changing how the pole is loaded and how the tension is distributed to the anchor; if it's too low, the pull is more horizontal, increasing lateral stress on the pole and the risk of improper tension. Choosing the correct attachment height helps achieve a balanced tension and stable support against wind and other forces, while keeping clearance and structural limits safe.

The other items listed aren’t about the point where the guy attaches to the pole. The crossarm is a structural member for supporting conductors, not the guy’s attachment point. Secondary service and transformer bank are equipment components, not the factor that defines the guying geometry.