When servicing a rectifier, which of the following practices should be followed?

When servicing a rectifier, it is essential to follow a comprehensive approach to ensure both safety and functionality. The correct selection indicates that all four practices are necessary.

Testing the case for voltage is crucial as it helps to ensure that the rectifier is not inadvertently energized, posing a safety hazard during servicing. Moreover, performing visual inspections provides insight into the physical condition of the rectifier, identifying any signs of damage, corrosion, or wear that might affect its operation. Additionally, checking all electrical connections is vital to ensure that they are secure and free from corrosion, as poor connections can lead to operational failures or inefficiencies. Finally, verifying the output voltage and current against specifications ensures that the rectifier is functioning properly and providing the correct level of rectification.

By encompassing all these practices, the technician can comprehensively assess the rectifier's condition, ensuring both safety and reliability in the electrical system. Each step plays a significant role in effective maintenance, ultimately reducing the likelihood of future issues.