Which of the following is an example of a minor alteration Type B?

A minor alteration Type B refers to changes that do not significantly affect the safety or operational characteristics of an elevating device. Replacing the cab decoration is a clear example of this type of alteration, as it involves cosmetic changes that do not alter the performance or safety features of the elevator.

In contrast, changing door sensors, modifying the elevator drive system, and changing electrical wiring could introduce variables that impact safety or operation. Door sensors are critical for safety and preventing accidents during door operation. Modifying the drive system can affect the elevator's functionality and performance, while electrical wiring changes can impact the electrical safety and control mechanisms. Therefore, these alterations are not classified as minor, as they could necessitate extensive inspections or modifications to ensure compliance with safety regulations.