Final answer:
Moment connections are not necessarily the most expensive in engineering.
Step-by-step explanation:
The statement, 'Moment connections are the most expensive,' is false. A moment connection is a type of structural connection used in engineering to join two members together in a way that allows them to transfer moments, or bending forces, between them. While moment connections may require more material and labor compared to other connection types, such as shear or axial connections, they are not necessarily the most expensive. The cost of a connection depends on various factors, including the design requirements, material costs, and construction methods.