Interview Questions in Electrical Engineering

• Interview Questions in Electrical Engineering
• Why the reactance of a system under fault condition is low and faults currents may raise dangerously high value. ? (With simple example)
• Why Battery rated in Ah (Ampere hour) and not in VA.
• Why Power Plant Capacity Rated in MW and not in MVA?
• Why AC rated in Tons, Not in kW or kVA? A Guide about Airconditioner and Refrigeration
• Why alternator rated in kVA. Not in kW?
• Why Motor rated in kW instead of kVA?
• What are the causes of changes in voltage in Alternators when loaded?
• How does electrical degree differ from mechanical degree?
• Which type of Synchronous generators are used in Hydro-electric plants and why?
• Why almost all large size Synchronous machines are constructed with rotating field system type?
• Why do cylindrical Alternators operate with steam turbines?
• Why are Alternators rated in kVA and not in kW?
• Why we do 2 types of earthing on transformer ie: body earthing & neutral earthing, what is function.
• Why ELCB can't work if N input of ELCB do not connect to ground?
• Why series motor cannot be started on no-load?
• Why in a three pin plug the earth pin is thicker and longer than the other pins?
• Why Delta Star Transformers are used for Lighting Loads?
• What are the advantages of star-delta starter with induction motor?
• Why is the starting current high in a DC motor?
• Why is the starting current high in a DC motor?
• Why Delta Star Transformers are used for Lighting Loads?
• Why in a three pin plug the earth pin is thicker and longer than the other pins?
• Why series motor cannot be started on no-load?
• Why ELCB can't work if N input of ELCB do not connect to ground?
• Why syn. generators r used for the production of electricity?
• Why, when birds sit on transmission lines or current wires doesn't get shock?
• why link is provided in neutral of an ac circuit and fuse in phase of ac circuit?
• Why is negative feedback more preferable in control system?
• Why AC systems are more used or preferred over DC systems?
• Why is star delta starter preferred with induction motor?
• Why transformers are rated in kva instade of kw?
• Why percentage impedance is important for parallel operation?
• what happen if we provide dc supply to transformer. and why.??
• Which one is dangerous AC or DC?
• What is difference between electronics & electrical engineering?
• What is the effect of increasing supply frequency on hysterisis and eddy current losses in a transformer?
• Why does the rotor rotate?
• Why neutral of transformer is earthed?
• What Happens When Generator Excitation is Lost?
• Why the circuit Current (I) decrease, when Inductance (L) or inductive reactance (XL) increases in inductive circuit?
• A (50/60 Hz) Transformer. Which one will give more Output? (When operates on 50 or 60 Hz frequency)
• Why Power in pure Capacitive Circuit is Zero (0)?
• Why Power in pure Inductive Circuit is Zero (0).
• Why Power in a circuit is Zero (0), in which Current and Voltage are 90 Degree out of phase?
• A Voltmeter, an ammeter (Ampere meter) and a battery cell are connected in series. It is observed that ammeter practically shows No Deflection. Why?
• The Main difference between Active and passive Commonest (Very Easy Explanation with Examples)
• Why we can’t store AC in Batteries instead of DC.or Can we 
• We Need to Install a Starter with a Motor?
• Why 
• store AC in batteries instead of DC?
• Why alternator rated in kVA. Not in kW?
• What are the fundamental differences between E.M.F (Electro motive force) and P.d (Potential difference)?
• Under what condition is D.C supply applied safely to the primary of a transformer?
• How To Calculate Your Electricity Bill. Easy and simple Explanation.
• What is the purpose of ground wires in over-Head Transmission lines?
• Why the reactance of a system under fault condition is low and faults currents may raise dangerously high value. ? (With simple example)
• Why A.C needs more insulation than D.C at same voltage level?
• What is The Difference between a VOLTAMETER and a VOLTMETER?
• What is the difference between a battery and a capacitor?
• What is the normal or average life expectancy of a Transformer ?
• Why a Auto Transformer is used in a grid?