Questions – Answers
Electrical and Electronics Engineering Interview Questions and Answers
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Can You use a 15A Outlet on a 20A Circuit and Vice Versa?
Is It Permissible to Use a 15-Amp Receptacle on a 20-Amp Breaker, or a 20-Amp Receptacle on a 15-Amp Circuit? Not everyone is familiar with electrical codes and their compliance…
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Can I Use a 240V Breaker on a 120V Circuit and Vice Versa?
Is It Permissible to Use a Double Pole 240V Breaker on a 120V Circuit, or a Single Pole 120V Breaker on a 240V Circuit? Over current protective devices (OCPDs) such…
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Can You Use 15A Breaker on 20A Circuit and Vice Versa?
Is It Permissible to Use a 15-Amp Breaker on a 20A-Amp Circuit, or a 20-Amp Breaker on a 15A-Amp Circuit? We often receive multiple queries regarding basic electrical wiring installations…
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Ground Terminal Up or Down: Which Way Should Outlets Face?
Should the Ground Prong and Hole in an Outlet Be Positioned at the Top or Bottom? One of the most classic debates in electrical installation among electricians and homeowners is…
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What Do the Green Dot or Orange Triangle Outlets Mean?
What is the Meaning of the Green Dot or Orange Triangle Symbol or Any Other Sign on an Electrical Outlet? On electrical outlets and receptacles, colored dots or symbols such…
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Why is Solid Wire Not Used on Ships, Vehicles & Moving Parts?
Why is the Use of Solid Wire Prohibited on Moving Components Such as Ships and Vehicles? Solid wire is generally not recommended for use in ships, vehicles, or other applications…
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Why Do Most Fans Have Three Blades?
Why Are Most Room and Ceiling Fans Designed with Three Blades? Cost, efficiency, and power are the three main factors that influence the design of any machine. The law of…
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Why Did Japan Choose 100V over 120V or 230V?
Why Does Japan Use 100V as the Standard Voltage? Power System in Japan Japan has a unique and somewhat unusual electric power transmission and distribution system. The standard voltage in…
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Why Japan Uses Overhead Power Lines Instead of Underground?
Why Do Tokyo’s Streets Have Overhead Power Lines Instead of Underground Cables? The travelers may noticed that the streets of Tokyo, and much of Japan, filled with unsightly overhead power…
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How Do Grounding and Earthing Shoes Work to Prevent ESD?
Purpose and Structure of Foot Grounders and Grounding Shoes for Health and ESD Prevention in EPA In sensitive electronic manufacturing environments, static electricity poses a significant risk to delicate components.…
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