Which term is often referred to as the "silent killer" in elevator safety?

The term often referred to as the "silent killer" in elevator safety is the counterweight. This component is crucial in the operation of an elevator as it balances the weight of the car and its load, reducing the amount of energy required to operate the elevator. However, if not properly maintained or if a malfunction occurs, the counterweight can cause significant dangers.

In situations where an elevator is not functioning correctly, the counterweight can unexpectedly descend, posing a risk of crushing injuries or severe accidents for anyone in the vicinity. Elevators are complex systems, and understanding the role of the counterweight helps ensure that proper safety protocols are followed, emphasizing the need for regular inspections and maintenance checks.

The other components mentioned—such as the hoist motor, brake system, and overload indicator—while important, do not carry the same level of risk in terms of silent danger as the counterweight does. In many cases, issues with these systems are more easily identifiable, while problems related to the counterweight may go unnoticed until an incident occurs.