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  ELECTRICAL ENGINEERING INTERVIEW QUESTION & ANSWER How do we select the Voltage for Megger in the Electrical System? Rated Voltage of Circuit under Test 220 V 440 V 1000 V 33 KV and Above 765 KV Test Voltage for IR test 500 V 1000 V 2.5 KV 5 KV 5 KV   The minimum IR Value is usually recommended as (kV+1) MΩ.        Where kV is the Equipment Voltage rating.        E.g: In 400 kV rated equipment a periodical 5000 V DC Insulation Resistance      (Megger) test is recommended.     The minimum criteria of IR value = (400+1) = 401 MΩ is enough . Explain about charging and discharging time of capacitor?          Ans:   The time constant (T) of a capacitor is Calculated by taking the Circuit Resistance and multiplying it by the circuit Capacitor. For a 1k Ω resistor and 1000 Pfarad Capacitor. The Time Constant should be 1 Second .This is the amount of time it takes for the Capacitor Voltage to increase 63.2% from its present Value to its final value.    The discharging circuit provides th

What are the standards for ISO 9001? ISO 9001 is defined as the international standard that specifies requirements for a quality management system (QMS) . Organizations use the standard to demonstrate the ability to consistently provide products and services that meet customer and regulatory requirements. What are the 10 clauses of ISO 9001? Top 10 Clauses in ISO 9001:2015 ·          Clause 0-3 – Introduction and scope of the standard. ·          Clause 4 – Context of the organization. ·          Clause 5 – Leadership. ·          Clause 6 – Planning. ·          Clause 7 – Support. ·          Clause 8 – Operation. ·          Clause 9 – Performance evaluation. ·          Clause 10 – Improvement.       ISO 9001 Requires the Following Forms:   1.       Customer property 2.       Design and development verification 3.       Purchasing process 4.       Management Reviews 5.       Identification and traceability 6.       In