Which term describes abrupt forces or shocks on a structure caused by rotating or reciprocating machinery?

• A. Impact Load
• B. Machinery Impact Load
• C. Dynamic Finite Element Analysis
• D. Pseudo-Static Analysis

Answer: (B)

When a structure experiences sudden forces from equipment that rotates or moves back and forth, the forces are shocks or impacts caused by that machinery. The term that specifically names this situation is machinery impact load. It directly links the abrupt, high-intensity loads to their source in rotating or reciprocating equipment, which is why it’s the most precise label.

General impact load could describe a sudden force from any cause and doesn’t specify the machinery origin. The other two options refer to how you analyze the structure (dynamic finite element analysis and pseudo-static analysis) rather than to the actual type of load being considered, so they don’t describe the load itself.