Questions – Answers
Electrical and Electronics Engineering Interview Questions and Answers
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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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Why is the Long Prong Neutral Instead of the Narrow Prong?
Why is the Wide Prong and Slot Designated as Neutral Instead of the Narrow Prong and Slot in a Plug and Outlet? Engineers typically avoid making arbitrary choices when designing…
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Why is the Neutral Prong or Slot Wider on a Plug or Outlet?
Why is the Neutral Prong and Slot Longer than the Hot Prong and Slot on a Plug and Outlet or Receptacle? Although the electrical power supply and distribution system in…
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Why are there Grooved Slots in the Pins of Two Pin Plugs?
Why are the Pins are Slotted in the 2 or 3-Pin Plugs? Threaded slots are commonly found in Type A, Type B, Type C (Europlug), Type E/F, and Indian standard…
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Is It Dangerous to Carry a Battery in an Elevator?
Does Carrying Large Rechargeable Batteries in a Lift Pose a Risk? A viral video shows a man carrying a lithium-ion battery that suddenly explodes in his face after he closes…
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Why Doesn’t DC System Require a Grounding System Similar to AC System?
Grounding System in DC Power Supplies and Network – Advantages and Drawbacks Actually, grounding and earthing are not required for either AC or DC systems to function. However, grounding via…
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