Electrical Apprenticeship Year 2 Practice Test 2026 – Complete Exam Prep

Ignoring power quality issues can lead to significant damage to electrical appliances and systems. Power quality refers to the characteristics of the electrical power supply that affect how well electrical equipment operates. When there are disturbances such as voltage sags, surges, harmonics, or transients, the performance of electrical equipment can be compromised. This can result in overheating, reduced lifespan, and even outright failure of appliances and systems.

For instance, sensitive electronic devices may malfunction or sustain damage when exposed to poor power quality. Motors may experience excessive wear and tear, which can lead to breakdowns and costly repairs. In severe cases, poor power quality can initiate fires due to electrical arcing or overheating. Therefore, addressing power quality issues is crucial for maintaining the health of electrical systems and preventing unintended repair costs and inconveniences.