Which are the three types of pins?

• A. Self sticking, Pressure sensitive, Anchor Pins
• B. Nails
• C. Self sticking Pins
• D. Pressure sensitive Pins

Answer: (A)

The concept being tested is how pin-type insulators are secured on a pole by classifying pins by their mounting method. There are three common types: self-sticking, pressure-sensitive, and anchor pins. Self-sticking pins use a surface that adheres to the mounting area to hold the insulator in place, enabling quick installation. Pressure-sensitive pins rely on applied pressure to clamp or lock the insulator onto the pin or arm, providing secure retention under typical operating conditions. Anchor pins incorporate a locking mechanism that grips the pole to resist pulling forces from the line, offering the strongest fixation for higher tension or longer spans. These three cover the main ways insulators are fixed, which is why this set is correct.