Electrical Engineering MCQ Quiz
Test your knowledge with these challenging questions
1. The location of a diode in the pilot circuit in GEB (Gate End Box) to achieve pilot core protection system is:
The diode is placed at the Gate End Box (GEB) to achieve pilot core protection. This location allows for effective monitoring and protection of the pilot circuit.
2. What is Intrinsically safe circuit used in face machinery of belowground coal mines?
Intrinsically safe circuits are designed such that any spark or thermal effect produced cannot cause ignition of the surrounding flammable atmosphere.
3. What is the colour code of 5 cores of trailing cable used in mines?
The standard color code for 5-core trailing cables in mines is red, yellow, and blue for phases, black for pilot, and green for earth.
4. In 440V, 3PH system the full load current of 40 HP electric motor is:
For a 40 HP motor in a 440V, 3-phase system, the full load current is approximately 50A (using formula: I = HP × 746 / (√3 × V × efficiency × pf)).
5. What are the protective features available in an Air Circuit Breaker (ACB)?
Air Circuit Breakers typically include Earth Leakage (E/L) protection, Overcurrent (O/C) protection, and No Volt protection as standard features.
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