Top 10 Industrial Electrical Interview Questions and Answers (Urdu/Hindi)

Industrial field mein kamyabi ke liye sirf kaam aana kafi nahi, balki technical sawalat ka jawab dena bhi zaroori hai. Agar aap kisi factory ya plant ke interview ki tayari kar rahe hain, to ye 5 points aapke bohat kaam ayenge.

​1. Motor Single Phasing Kya Hai?

​Jab 3-phase motor ko milne wali supply mein se ek phase kat jaye ya fuse urr jaye, to ise Single Phasing kehte hain. Is surat mein motor bohat ziada garam ho jati hai aur jal sakti hai. Is se bachne ke liye hum Single Phase Preventer istemal karte hain.

​2. MCCB aur MCB mein kya farq hai?

• ​MCB (Miniature Circuit Breaker): Ye aam tor par gharon ya choti machines (63 Ampere tak) ke liye hota hai.
• ​MCCB (Molded Case Circuit Breaker): Ye bari industries mein heavy load (2500 Ampere tak) ke liye istemal hota hai aur iska trip level adjust kiya ja sakta hai.

​3. Transformer ki Rating KVA mein kyun hoti hai?

​Transformer mein do tarah ke losses hote hain: Copper Loss (jo current par depend karta hai) aur Iron Loss (jo voltage par depend karta hai). Kyunke load ka exact Power Factor maloom nahi hota, isliye transformer ko KVA (Kilovolt-Ampere) mein rate kiya jata hai, KW mein nahi.

​4. Relay ka kya maqsad hota hai?

​Relay ek "Sensing Device" hai jo system mein fault (overcurrent ya earth fault) ko pehchanti hai aur circuit breaker ko signal bhejti hai taake wo supply band kar de aur nuksan na ho.

​5. Megger Test kyun kiya jata hai?

​Megger ka istemal Insulation Resistance check karne ke liye hota hai. Is se humein pata chalta hai ke motor ki windings ya cables kahin se "Leak" ya "Short" to nahi hain

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