TOP ELECTRICAL ENGINEERING Interview Questions and Answers. CLICK HERE —- > ELECTRICAL ENGINEERING MCQs. What is electric traction? Electric traction means using the electric power for traction system (i. Now a days, magnetic traction is also used for bullet trains. How can you start- up the 4.

Sir, i cannot able to view the circuit diagram and the graph, why it happen so, whether it requires any software?, please help us in this issue. Mechanical Engineering MCQs. 1000 Casting-Forming-Welding MCQs; 1000 Machine Tools MCQs; 1000 Machine Design MCQs; 1000 Advanced Machining MCQs; 1000 Thermodynamics MCQs.

AC/DC without using any choke/Coil? It’s possible by means of Electronic chokes,otherwise it’s not possible to ionize the particles in tube light with normal voltage. What is “pu” in electrical engineering? Pu stands for per unit and this will be used in single line diagram of power distribution and it is like a huge electrical circuit with no of components (generators, transformers, loads) with different ratings (in MVA and KV). To bring all the ratings into common platform we use pu concept in which, in general largest MVA and KV ratings of the component is considered as base values, then all other component ratings will get back into this basis.

Those values are called as pu values. Operation carried out in Thermal power stations?

The water is obtained in the boiler and the coal is burnt so that steam is obtained this steam is allowed to hit the turbine , the turbine which is coupled with the generator generates the electricity. Why link is provided in neutral of an ac circuit and fuse in phase of ac circuit? Link is provided at a Neutral common point in the circuit from which various connection are taken for the individual control circuit and so it is given in a link form to withstand high Amps. But in the case of Fuse in the Phase of AC circuit it is designed such that the fuse rating is calculated for the particular circuit (i. So if any malfunction happen the fuse connected in the particular control circuit alone will blow off.

ELECTRICAL ENGINEERING Interview Questions. How tube light circuit is connected and how it works?

A choke is connected in one end of the tube light and a starter is in series with the circuit. When supply is provided ,the starter will interrupt the supply cycle of AC. Due to the sudden change of supply the chock will generate around 1. Adele Full Album Free Download 25Th.

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This volt will capable of to break the electrons inside the tube to make electron flow. What is encoder, how it function? An encoder is a device used to change a signal (such as a bitstream) or data into a code.

The code may serve any of a number of purposes such as compressing information for transmission or storage, encrypting or adding redundancies to the input code, or translating from one code to another. This is usually done by means of a programmed algorithm,especially if any part is digital, while most analog encoding is done with analogcircuitry. What are the advantages of speed control using thyristor?

Advantages : Fast Switching Characteristics than Mosfet, BJT, IGBTLow cost. Higher Accurate. 1. Why Human body feel Electric shock ?? Why, when birds sit on transmission lines or current wires doesn’t get shock?

Its true that if birds touch the single one line (phase or neutral) they don’t get electrical shock. The armature flux may support main flux or opposes main flux. Normally they have low resistance. When DC supply is applied, due to low resistance, the current through lamp would be so high that it may damage the bulb element. Which motor has high Starting Torque and Staring current DC motor, Induction motor or Synchronous motor?

DC Series motor has high starting torque. We can not start the Induction motor and Synchronous motors on load, but can not start the DC series motor without load. What is vacuum circuit breaker. Device? A breaker is normally used to break a circuit.

Due to existing current flow the air in the gap is ionised and results in the arc. VCB’s can be used up to kv. What will happen when power factor is leading in distribution of power?

If their is high power factor, i. And electrical engineering & electronics engineering ? What is 2 phase motor? A two phase motor is a motor with the the starting winding and the running winding have a phase split. Advantages of vvvf drives over non vvvf drives for EOT cranes? What is the significance of vector grouping in Power Transformers?

Every power transformer has a vector group listed by its manufacturer. Fundamentally it tells you the information about how the windings are connected (delta or wye) and the phace difference between the current and voltage.

DYN means Delta primary, Wye Secondry and the current is at o clock reffered to the voltage. 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 ? Its Single Phase induction motor which mostly squirrel cage rotor and are capacitor start capacitor run. Boku Ga Boku No Subete Download Movies.

Give two basic speed control scheme of DC shunt motor? By using flux control method: in this method a rheostat is connected across the field winding to control the field current. Ia. Ra)can be varied,and since speed is directly proportional to Eb- Ia. Ra the speed can be controlled. The armature flux may support main flux or opposes main flux.

Give two basic speed control scheme of DC shunt motor? By using flux control method: in this method a rheostat is connected across the field winding to control the field current. Ia. Ra)can be varied,and since speed is directly proportional to Eb- Ia. Ra the speed can be controlled. What is the Polarization index value ?

It ranges from 5- 7 for new motors & normally for motor to be in good condition it should be Greater than . What is the difference between synchronous generator & asynchronous generator? In simple, synchronous generator supply’s both active and reactive power but asynchronous generator(induction generator) supply’s only active power and observe reactive power for magnetizing. This type of generators are used in windmills. BTU/hr and to convert BTU/hr to horsepower, 1.

KW. 3. 3. Enlist types of dc generator? D. C. Generators are classified into two types: separatly exicted d. What is Automatic Voltage regulator(AVR)?

AVR is an abbreviation for Automatic Voltage Regulator. It is important part in Synchronous Generators, it controls theoutput voltage of the generator by controlling its excitation current. Thus it can control the output Reactive Power of the Generator. What is an exciter and how does it work? There are two types of exciters, static exciter and rotory exciter. Rotory excitor is an additional small generator mounted on the shaft of main generator.

Difference between a four point starter and three point starter? The shunt connection in four point stater is provided separately form the line where as in three point stater it is connected with line which is the drawback in three point stater. Why use the VCB at High Transmission System ? Why can’t use ACB? Actually the thing is vacuum has high arc quenching property compare to air because in VCB ,the die electric strengths equal to 8 times of air . That y always vacuum used as in.

HT breaker and air used as in LT . What is the difference between surge arrestor and lightning arrestor? LA is installed outside and the effect of lightning is grounded,where as surge arrestor installed inside panels comprising of resistors which consumes the energy and nullify the effect of surge. What happens if i connect a capacitor to a generator load? Connecting a capacitor across a generator always improves power factor,but it will help depends up on the engine capacity of the alternator,other wise the alternator will be over loaded due to the extra watts consumed due to the improvement on pf. Secondly, don’t connect a capacitor across an alternator while it is picking up or without any other load.

Why the capacitors works on ac only? Generally capacitor gives infinite resistance to dc components(i. Explain the working principal of the circuit breaker? Circuit Breaker is one which makes or breaks the circuit. It has two contacts namely fixed contact & moving contact.