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[Engineering - Electrical]

⇒	1 ton is equal to how many watts?
⇒	A (50/60 Hz) Transformer. Which one will give more Output?
⇒	Advantages of PLCs than Hard wired Relay?
⇒	Advantages of vvvf drives over non vvvf drives for EOT cranes?
⇒	ARC
⇒	Battery banks are in connected in series or parallel and why?
⇒	Bundled Conductors and Composite Conductors Difference?
⇒	Can we store AC in batteries instead of DC?
⇒	Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?
⇒	Comment on the working principle of operation of a single-phase transformer.
⇒	Comment on the working principle of operation of a single-phase transformer.
⇒	Compare JFET’s and MOSFET’s.
⇒	Corona Ring on Surge Arresters and other EHV equipment
⇒	Could you explain about reverse power relay?
⇒	Define IDMT relay?
⇒	Define stepper motor. What is the use of stepper motor?
⇒	Define the followin? Average demand, Maximum demand, Demand factor, Load factor.
⇒	Define the following terms:- - Reliability, - Maximum demand, - Reserve-generating capacity, - Availability (operational).
⇒	Define the following: Average demand, Maximum demand, Demand factor, Load factor.
⇒	Define Voltage types?
⇒	Define what is difference between fuse and breaker?
⇒	Define what is power quality meter ?
⇒	Define What is the function of anti-pumping in circuit breaker?
⇒	Describe DC motor Braking methods?
⇒	Difference between a four point starter and three point starter?
⇒	Difference between megger test equipment and contact resistance meter test instruments?
⇒	Difference between Solid Conductor and Stranded Conductor?
⇒	Difference between Thermal and Nuclear Power Plants?
⇒	Different Levels of SCADA?
⇒	Different Transformers in Thermal Power Plant?
⇒	Do transients occur in power lines only?
⇒	Enlist types of dc generator?
⇒	Explain advantages of storage batteries.
⇒	Explain advantages of storage batteries?
⇒	Explain different losses in a transformer.
⇒	Explain different types of D.C motors? Give their applications.
⇒	Explain forward resistance, static resistance and dynamic resistance of a pn junction diode.
⇒	Explain How to determine capacitor tolerance codes?
⇒	Explain the application of storage batteries.
⇒	Explain the operation of variable frequency transformer?
⇒	Explain the process of commutation in a dc machine. Explain what are inter-poles and why they are required in a dc machine.
⇒	Explain the process of commutation in a dc machine. Explain what are inter-poles and why they are required in a dc machine.
⇒	Explain the statement that ” In Inductive circuit, when Inductance (L) or inductive reactance (XL) increases, the circuit Current (I) decrease”
⇒	Explain the terms real power, apparent power and reactive power for ac circuits and also the units used.
⇒	Explain the working principal of the circuit breaker?
⇒	Explain thin film resistors and wire-wound resistors.
⇒	Explain Transposition of the power lines ?
⇒	Explain What is use of lockout relay in ht voltage?
⇒	Factors on which material of station busbar depends?
⇒	For distribution network which type of Switching scheme is employed?
⇒	Gas Insulated Substations Advantages Disadvantages ?
⇒	Give two basic speed control scheme of DC shunt motor?
⇒	How can you relate power engineering with electrical engineering?
⇒	How can you start-up the 40w tube lite with 230v AC/DC without using any choke/Coil?
⇒	How do you select a cable size (Cu & Al) for a particular load?
⇒	How does a battery produce its potential difference (voltage)?
⇒	How does Zener phenomenon differ from Avalanche breakdown?
⇒	How electrical power is generated by an A.C Generator?
⇒	How energy is generated in Nuclear power plant?
⇒	How Generator Transformer is cooled in Thermal Power Plant?
⇒	How many types of colling system it transformers?
⇒	How much Watts Solar Panel We need for our Home Electrical ?
⇒	How to calculate capacitor bank value to maintain unity power factor with some suitable example?
⇒	How to Calculate the charging Time and Charging current for battery Charging?
⇒	How To Calculate Your Electricity Bill?
⇒	How to determine alternating current frequency?
⇒	How to determine capacitor tolerance codes?
⇒	How to Reduce the Ferranti Effect in a Transmission Line?
⇒	How transients are produced in our system?
⇒	How tube light circuit is connected and how it works?
⇒	If I have a 25kVA generator, how many 2 Ton Air conditioner can be used?
⇒	If one lamp connects between two phases it will glow or not?
⇒	If we give 2334 A, 540V on Primary side of 1.125 MVA step up transformer, then what will be the Secondary Current, If Secondary Voltage=11 KV?
⇒	In a Tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?
⇒	In the motors starting purpose why the armature rheostats at maximum position while the field rheostat is kept in minimum position?
⇒	In three pin plug 6 Amp. 220v AC rating. why earth pin diameter is higher than other two pin? what its purpose ?
⇒	Master Terminal Units (MTU) in SCADA systems ?
⇒	Mention the disadvantages of low power factor? How can it be improved?
⇒	Mention the methods for starting an induction motor?
⇒	Name power losses in rotating electrical machines.
⇒	Name the types of motors used in vacuum cleaners, phonographic appliances, vending machines, refrigerators, rolling mills, lathes, power factor improvement and cranes.
⇒	Operation carried out in Thermal power stations?
⇒	Say there is air conditioner of 1Ton, what does that mean?
⇒	SCADA system applications ?
⇒	State Maximum power transfer theorem ?
⇒	State Norton’s Theorem?
⇒	State the difference between generator and alternator?
⇒	State the factors, for the choice of electrical system for an aero turbine.
⇒	State the methods of improving power factor?
⇒	State Thevenin’s Theore?
⇒	Sulfur hexafluoride gas (SF6) gas properties
⇒	Tell me in detail about c.t. and p.t. ?(Company:reliance)
⇒	Tell us about Various Substation Equipment ?
⇒	The Main Difference between Active and Passive Components
⇒	There are a Transformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?
⇒	Transformer Testing methods ?
⇒	Transformer works on which principle?
⇒	Two bulbs of 100w and 40w respectively connected in series across a 230v supply which bulb will glow bright and why?
⇒	Use of switch mode power converter in real-time basis?
⇒	Voltage Regulation of Transformer ?
⇒	What are advantages of PLCs over RTUs?
⇒	What are Causes of low Power Factor ?
⇒	What are different Bus bar materials used in Substation?
⇒	What are different components in PLC?
⇒	What are different types of busbar arrangement Schemes in Substations?
⇒	What are different types of circuit breakers employed in thermal power plant?
⇒	What are different types of Control Systems?
⇒	What are different types of Induction Motors available?
⇒	What are different types of Pulverizes?
⇒	What are different types of Steam boilers used in Thermal Power Plants?
⇒	What are HRC fuses and where it is used?
⇒	What are Motor Generator Sets and explain the different ways the motor generator set can be used ?
⇒	What are the advantage of free wheeling diode in a Full Wave rectifier?
⇒	What are the advantages of speed control using thyristor?
⇒	What are the advantages of star-delta starter with induction motor?
⇒	What are the advantages of VSCF wind electrical system?
⇒	What are the different auxiliary systems in thermal power plant?
⇒	What are the different electrical clearances in Substation?
⇒	What are the different Generator Protections employed in Thermal Power Plants?
⇒	What are the different losses that occur in thyristor while operating?
⇒	What are the different methods for the starting of a synchronous motor ?
⇒	What are the different substation components?
⇒	What are the effects of transients?
⇒	What are the full forms of ASME and ASTM?
⇒	What are the major electric systems in Thermal Power Plant?
⇒	What are the particles used in nuclear fission?
⇒	what are the points to be consider for MCB(miniature circuit breaker selection?
⇒	What are the possible causes for low power factor?
⇒	What are the transformer losses?
⇒	What are the types of power in electrical power?
⇒	What are the various kind of cables used for transmission?
⇒	What are Transformer parallel operation conditions ?
⇒	What are transients in power system?
⇒	What does Central Processing Unit (CPU) of PLC consists?
⇒	What does quality factor depend on in resonance?
⇒	what happen if we give 220 volts dc supply to d bulb r tube light?
⇒	What happen when Induction motor run at synchronous speed?
⇒	What happens if i connect a capacitor to a generator load?
⇒	What is 2 phase motor?
⇒	What is a differential amplifier? Also, explain CMRR.
⇒	What is a feedback in Control System?
⇒	What is a System?
⇒	What is a transmission voltage?
⇒	What is ACSR cable and where we use it?
⇒	What is an exciter and how does it work?
⇒	What is Automatic Voltage regulator(AVR)?
⇒	What is basic difference between transformer and inducter?
⇒	what is boucholz relay and the significance of it in to the transformer?
⇒	What is Cavitation and disadvantages of Cavitation?
⇒	What is Chain reaction and how it is controlled in Nuclear reactor?
⇒	What is Control System?
⇒	What is derating?, why it is necessary, it is same for all means for drives, motors,and cables.
⇒	What is difference between operating voltage and input voltage?
⇒	What is difference between terminal voltage and generated voltage?
⇒	What is different between resistance grounding system and resistance earthing system?
⇒	What is electric traction?
⇒	What is electrical diversity factor in electrical installations?
⇒	What is encoder, how it function?
⇒	What is excitation current or magnetising current in Transformer?
⇒	What is excitation?
⇒	What is ferrantic effect?
⇒	What is fertile material and fissile material?
⇒	What is Forebay and its importance?
⇒	What is frantic effect?
⇒	What is Frequency Domain Analysis?
⇒	What is Frequency Response Analysis and its advantages?
⇒	What is Frequency Response?
⇒	What is half life and its significance?
⇒	What is Harmonics Distortion and its effect in Power System
⇒	What is Holding current?
⇒	What is Hydrogen Scavenging process in Generator?
⇒	What is inrush current?
⇒	What is Islanding Operation ?
⇒	What is Latching current?
⇒	What is Main Difference b/w Electrical and Electronics Engineering?
⇒	what is meant by armature reaction?
⇒	What is meant by insulation voltage in cables? explain it?
⇒	What is meant by knee point voltage?
⇒	What is meant by regenerative braking?
⇒	What is Penstock?
⇒	What is PI Controllers in Process System?
⇒	What is Potential Transformer (PT)?
⇒	what is power factor? whether it should be high or low? why?
⇒	What is power quality meter ?
⇒	what is Progrmmable Logic Controllers (PLCs) ?
⇒	What is rated speed?
⇒	What is reverse power relay?
⇒	What is SCAN in PLC ?
⇒	What is SF6 Circuit Breaker?
⇒	What is slip in an induction motor?
⇒	What is Smart Grid?
⇒	What is steady state and transient stability?
⇒	What is stepper motor.what is its uses?
⇒	What is Tailrace?
⇒	What is the advantage of Slip Ring Induction Motor?
⇒	What is the advantage of Squirrel Cage Induction Motor?
⇒	What is the basic loading condition for transformer and its life expectancy?
⇒	What is the capacity of CPU of Remote Terminal Unit (RTU)?
⇒	What is the count of hvdc transmission lines in India?
⇒	What is the difference between a battery and a capacitor?
⇒	What is The Difference between a VOLTAMETER and a VOLTMETER?
⇒	What is the difference between delta-delta, delta-star transformer?
⇒	What is the difference between earth resistance and earth electrode resistance?
⇒	What is the difference between Electro-magnetic and electro-mechanical transients?
⇒	What is the difference between electronic regulator and ordinary electrical rheostat regulator for fans?
⇒	What is the difference between generator and alternator?
⇒	What is the difference between harmonics and transients?
⇒	What is the difference between Isolator and Circuit Breaker?
⇒	What is the difference between isolators and electrical circuit breakers? What is bus-bar?
⇒	What is the difference between isolators and –>electrical circuit breakers? What is bus-bar?
⇒	What is the difference between MCB & MCCB, Where it can be used?
⇒	What is the difference between MCB & MCCB, Where it can be usehe difference between MCB & MCCB, Where it can be used?
⇒	What is the difference between phase and line voltage?
⇒	What is the difference between Power Transformers and Distribution Transformers?
⇒	What is the difference between shunt reactor and line or bus reactor?
⇒	What is the difference between surge arrestor and lightning arrestor?
⇒	What is the difference between synchronous generator & asynchronous generator?
⇒	what is the difference between synchronous generator & asynchronous generator?
⇒	What is the difference between the feeder and bus bar?
⇒	What is the different between digital phase converter and ordinary phase converter?
⇒	What is the effect of positive feedback on stability of the system?
⇒	What is the emf equation of transformer?
⇒	What is the first equipment of the substation connected to the incoming transmission line?
⇒	what is the full form of KVAR?
⇒	What is the function of anti-pumping in circuit breaker?
⇒	What is the function of interposing current transformer?
⇒	What is the Ideal transformer?
⇒	What is the largest pump in the thermal power plant?
⇒	What is the main difference between contactor and Starter?
⇒	What is the main difference between negative terminal and ground terminal of voltage source?
⇒	What is the main difference between voltage, EMF and a potential difference?
⇒	What is the main use of rotary phase converter ?
⇒	What is the normal or average life expectancy of a Transformer ?
⇒	What is the Polarization index value ? (pi value)and simple definition of polarization index ?
⇒	What is the power factor of an alternator at no load?
⇒	What is the Power Supply provided to the RTU?
⇒	what is the principle of motor?
⇒	What is the programmable language used in PLC?
⇒	What is the purpose of Pulverizes?
⇒	What is the ratio of CT?
⇒	What is the relation between applied voltage and emf induced with respect to flux wave?
⇒	What is the Role of Capacitor in AC and DC Circuit?
⇒	What is the significance of vector grouping in Power Transformers?
⇒	What is the Significance of voltage per turn?
⇒	What is the speed variation of the induction motor from no load to full load?
⇒	What Is The Use For Cable Entry In Control Room?
⇒	What is the voltage gain or transfer function of amplifier?
⇒	What is Trash Racks?
⇒	What is Tunnel Diode?
⇒	What is use of lockout relay in ht voltage?
⇒	What is vaccum currcuit breaker.define with cause and where be use it Device?
⇒	What is water hammering phenomenon?
⇒	What is “pu” in electrical engineering?
⇒	What type of cables are used for transmissions?
⇒	What type of cooling is provided for Generator in power plant?
⇒	What types domain of Laplace transforms? What behavior can Laplace transform predict how the system work?
⇒	What will happen if DC supply is given on the primary of a transformer?
⇒	What will happen if you increase current through a conductor ?
⇒	What will happen when power factor is leading in distribution of power?
⇒	What will happen when power factor is leading in distribution of power?
⇒	What will reduce Neutral currents ?
⇒	whats is MARX CIRCUIT?
⇒	Whats the one main difference between UPS & inverter ? And electrical engineering & electronics engineering ?
⇒	What’s electric traction?
⇒	When does Proportional (P) Integral (I) Derivative (D) Controllers are Used
⇒	When voltage increases then current also increases then what is the need of over voltage relay and over current relay?
⇒	When we connect the large capacitor bank in series?
⇒	Where Servomechanism is used?
⇒	Where should the lighting arrestor be placed in distribution lines?
⇒	Which motor has high Starting Torque and Staring current DC motor, Induction motor or Synchronous motor?
⇒	Which power plant has high load factor?
⇒	Which type of A.C motor is used in the fan (ceiling fan, exhaust fan, padestal fan, bracket fan etc) which are find in the houses ?
⇒	Which type of bus arrangement is costlier and more reliable?
⇒	Which type of motor is used in trains, what is the rating of supply used explain Working principal?
⇒	Which type of oil is used as a transformer oil?
⇒	Why AC Needs More Insulation Than DC at Same Voltage Level?
⇒	Why AC rated in Tons, Not in kW or kVA? Guide about Air-conditioner and Refrigeration.
⇒	Why AC systems are preferred over DC systems?
⇒	Why an ac solenoid valve attract the plunger even though we interchanges the terminal? Will the poles changes?
⇒	Why back emf used for a dc motor? highlight its significance.
⇒	Why back emf used for a dc motor? highlight its significance.
⇒	Why Battery rating in Ah (Ampere hour) and not in VA.
⇒	Why computer humming sound occurred in HT transmission line?
⇒	Why DC voltage is not used in transformer?
⇒	Why Delta Star Transformers are used for Lighting Loads?
⇒	Why efficiency of transformer is high?
⇒	Why EHV busbars are hallowed and circular?
⇒	Why ELCB can’t work if N input of ELCB do not connect to ground?
⇒	Why electricity in India is in the multiples of 11 like 11kv, 22kv, 33kv ?
⇒	Why field rheostat is kept in minimum position while armature rheostat at maximum position?
⇒	Why Human body feel Electric shock ?? n in an Electric train during running , We did nt feel any Shock ? why?
⇒	Why in a three pin plug the earth pin is thicker and longer than the other pins?
⇒	Why induction motor develops a torque?
⇒	Why induction motor draws heavy current at starting?
⇒	Why Induction Motor name has come?
⇒	Why is AC systems preferred to DC systems?
⇒	Why is the starting current high in a DC motor?
⇒	Why link is provided in neutral of an ac circuit and fuse in phase of ac circuit?
⇒	Why Low Voltage winding near core of the Transformer?
⇒	Why most of analog o/p devices having o/p range 4 to 20 mA and not 0 to 20 mA?
⇒	Why motor are rated as KW while transformer rated in kVA?
⇒	Why Motor rated in kW/Horsepower instead of kVA?
⇒	Why Negative Feedback is preffered in the Control System?
⇒	Why power factor of the transformer under no load is very low?
⇒	Why Power Plant Capacity Rated in MW and not in MVA?
⇒	Why SCADA systems are Implemented?
⇒	Why series motor cannot be started on no-load?
⇒	Why should be the frequency 50 Hz 60Hz only why not others like 45, 95 56 or anything , why should we maintain the frequency constant if so why it is only 50 Hz 60Hz?
⇒	Why star delta starter is preferred with induction motor?
⇒	Why syn. generators are used for the production of electricity?
⇒	Why temperature rise is conducted in bus bars and isolators?
⇒	Why the capacitors works on ac only?
⇒	Why the reactance of a system under fault condition is low and faults currents may raise dangerously high value. ? (With simple example)
⇒	Why thyristor is considered as Charge controlled device?
⇒	Why Transformer Rating In kVA, Not in KW?
⇒	Why transformer ratings are in kva?
⇒	Why use the VCB at High Transmission System ? Why can’t use ACB?
⇒	Why we can’t store AC in Batteries instead of DC.or Can we store AC in batteries instead of DC?
⇒	Why we do 2 types of earthing on transformer (i?)body earthing & neutral earthing , what is function. i am going to install a oo kva transformer & 380 kva DG set what should the earthing value?
⇒	Why we do transient analysis?
⇒	Why We Need to Install a Starter with a Motor?
⇒	Why we use ac system in India why not dc?
⇒	Why, when birds sit on transmission lines or current wires doesn’t get shock?
⇒	Will a D.C Shunt Motor operate on an A.C Supply?
⇒	Will the tranformers work on pulsating dc ? as there occurs a change in magnitude of the flux produced
⇒	You may have noticed there are fuse and circuit breakers. What is the difference between the both?
⇒	You would be aware that transformer has an insulating oil, which oil is that?