Magnetic Particle Inspection Level 1 Practice Exam

What type of power supply is typically required for stationary magnetic particle testing equipment?

1. 110 V single-phase

2. 220 or 440 V three-phase

3. 120 V three-phase

4. 240 V single-phase

The correct answer is: 220 or 440 V three-phase

The correct choice indicates that stationary magnetic particle testing equipment typically requires a 220 or 440 V three-phase power supply due to the significant power demands of the electromagnetic coils used in the process. Stationary equipment is usually larger and more robust, designed for continuous operation in industrial settings. The three-phase power supply provides a more stable and efficient energy source, which is necessary for generating the strong magnetic fields required for effective magnetization of the test objects. Using three-phase power helps to minimize the harmonic distortion and improves the performance of electric motors and coils, delivering consistent results during inspections. In contrast, single-phase supplies, like 110 V or 240 V, are more suited for portable or less demanding applications, which is why they are less commonly used for stationary setups in most industrial contexts.