Which belt type is used for power transmission through multiple bidirectional loading sheaves?

Which belt type is used for power transmission through multiple bidirectional loading sheaves?

• A. Single-Sided Belt
• B. Double-Sided Belt
• C. Crossed Belt
• D. Wrapped Belt

Answer: (B)

The key idea is having two driving surfaces so power can be transmitted to pulleys on opposite faces of the belt. A double-sided belt is designed with driving capability on both sides, which lets a single belt drive multiple sheaves placed on each face or along a path where loads appear on both sides. This makes it suitable for power transmission through several bidirectional loading sheaves, because you can pull torque from either face without flipping or re-routing the belt. A single-sided belt only uses one surface, so it can feed only one set of pulleys on that side. A crossed belt reverses rotation direction but isn’t about distributing load across multiple opposite-face pulleys. A wrapped belt increases contact on one surface for better grip, but still transmits power from a single face, not from two opposing faces.

The key idea is having two driving surfaces so power can be transmitted to pulleys on opposite faces of the belt. A double-sided belt is designed with driving capability on both sides, which lets a single belt drive multiple sheaves placed on each face or along a path where loads appear on both sides. This makes it suitable for power transmission through several bidirectional loading sheaves, because you can pull torque from either face without flipping or re-routing the belt.

A single-sided belt only uses one surface, so it can feed only one set of pulleys on that side. A crossed belt reverses rotation direction but isn’t about distributing load across multiple opposite-face pulleys. A wrapped belt increases contact on one surface for better grip, but still transmits power from a single face, not from two opposing faces.