EEE_ Technical Interview Questions. 1. Why star delta starter is How can you relate power engineering with electrical engineering? Power engineering is a. Electrical Engineering interview questions and answers pdf free download for freshers & Experienced,eee questions mcqs viva objective faqs. Click here to find Interview questions,Interview preparation,Interview puzzles etc updated on India's No.1 Job Portal for freshers - gonddetheppolad.cf . Review a list of frequently asked Electrical interview questions for electrical graduates.
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Electrical engineering Interview Questions and Answers - Free download as PDF File .pdf), Text File .txt) or read online for free. 20 Electrical Engineering Interview Questions & Answers This is a must know question for any good Electrical Engineer Download PDF. ELECTRICAL INTERVIEW QUESTIONS AND ANSWERS. Visit gonddetheppolad.cf more resources. 1. What happens if I connect a capacitor to a generator load?.
Output voltage is greater than the input voltage or receiving end voltage is greater than the sending end voltage. What is meant by insulation voltage in cables? It is the property of a cable by virtue of it can withstand the applied voltage without rupturing it is known as insulation level of the cable.
MCB is miniature circuit breaker which is thermal operated and use for short circuit protection in small current rating circuit. MCCB moulded case circuit breaker and is thermal operated for over load current and magnetic operation for instant trip in short circuit condition.
Normally it is used where normal current is more than A. Where should the lighting arrestor be placed in distribution lines?
Near distribution transformers and out going feeders of 11kv and incomming feeder of 33kv and near power transformers in sub-stations. It is an inverse definite minimum time relay. In IDMT relay its operating is inversely proportional and also a characteristic of minimum time after which this relay operates. It is inverse in the sense ,the tripping time will decrease as the magnitude of fault current increase.
Copper losses are caused by the resistance of the wire I2R. Magnetic losses are caused by eddy currents and hysteresis in the core. Copper loss is a constant after the coil has been wound and therefore a measurable loss. Hysteresis loss is constant for a particular voltage and current.
Electrical engineering Interview Questions and Answers
Eddy-current loss, however, is different for each frequency passed through the transformer. Two bulbs of w and 40w respectively connected in series across a v supply which bulb will glow bright and why? Why temperature rise is conducted in bus bars and isolators? Bus bars and isolators are rated for continuous power flow, that means they carry heavy currents which rises their temperature.
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. 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. 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 the capacitors works on ac only? Generally capacitor gives infinite resistance to dc components i. ONAN oil natural,air natural 2.
ONAF oil natural,air forced 3. OFAF oil forced,air forced 4. ODWF oil direct,water forced 5. OFAN oil forced,air forced. 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.
A two phase motor is a motor with the the starting winding and the running winding have a phase split. What is the principle of motor?
Whenever a current carrying conductor is placed in an magnetic field it produce turning or twisting movement is called as torque. The effect of armature flu to main flux is called armature reaction.
The armature flux may support main flux or opposes main flux. It is used with generators for charging a number of capacitor in parallel and discharging them in series. It is used when voltage required for testing is higher than the available. Higher Accurate.
Uninterrupt power supply is mainly use for short time. What will happen when power factor is leading in distribution of power?
If their is high power factor, i. What are the advantages of star-delta starter with induction motor? The main advantage of using the star delta starter is reduction of current during the starting of the motor.
Starting current is reduced to times Of current of Direct online starting.
Electrical Engineering Interview Questions & Answers
Hence the starting current is reduced , the voltage drops during the starting of motor in systems are reduced. For lighting loads, neutral conductor is must and hence the secondary must be star winding. To minimize the current unbalance in the primary we use delta winding in the primary. Why computer humming sound occurred in HT transmission line? This computer humming sound is coming due to ionization breakdown of air into charged particles of air around transmission conductor.
This effect is called as Corona effect, and it is considered as power loss. At the time of motor taking normal current rated current the speed of the motor is called rated speed. It is a speed at which any system take small current and give maximum efficiency. If one lamp connects between two phases it will glow or not? If the voltage between the two phase is equal to the lamp voltage then the lamp will glow.
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When the voltage difference is big it will damage the lamp and when the difference is smaller the lamp will glow depending on the type of lamp. Get daily job alert, placement paper and GK updates every day on your email. Register Now to benefit from our unlimited fresher focussed services! Contribute Placement Papers. Free Job Alert. Sarkari Naukri. Employment News. Sarkari Results. Campus Fests. Job Results.
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Electronics Interview Questions. Mechanical Interview Questions. Electrical Interview Questions updated on Apr What is a System? When a number of elements or components are connected in a sequence to perform a specific function, the group of elements that all constitute a System 2. What is Control System?
What are different types of Control Systems? What is a feedback in Control System?
Why Negative Feedback is preffered in the Control System? What is the effect of positive feedback on stability of the system? But positive feedbacks are used in minor loop control systems to amplify certain internal signals and parameters 7.
Both have the same principle of electromagnetic induction, the only difference is that their construction. Generator persists stationary magnetic field and rotating conductor which rolls on the armature with slip rings and brushes riding against each other, hence it converts the induced emf into dc current for external load whereas an alternator has a stationary armature and rotating magnetic field for high voltages but for low voltage output rotating armature and stationary magnetic field is used.
Due to following reasons, AC systems are preferred over DC systems: It is easy to maintain and change the voltage of AC electricity for transmission and distribution. Plant cost for AC transmission circuit breakers, transformers etc is much lower than the equivalent DC transmission c. When a large fault occurs in a network, it is easier to interrupt in an AC system, as the sine wave current will naturally tend to zero at some point making the current easier to interrupt.
Power engineering is a sub division of electrical engineering. It deals with generation, transmission and distribution of energy in electrical form.
Design of all power equipments also comes under power engineering. Power engineers may work on the design and maintenance of the power grid i. Cables, which are used for transmitting power, can be categorized in three forms: The induced emf developed when the rotating conductors of the armature between the poles of magnet, in a DC motor, cut the magnetic flux, opposes the current flowing through the conductor, when the armature rotates, is called back emf. Its value depends upon the speed of rotation of the armature conductors.
In starting, the value of back emf is zero. Slip can be defined as the difference between the flux speed Ns and the rotor speed N. Speed of the rotor of an induction motor is always less than its synchronous speed. Storage batteries are used for various purposes, some of the applications are mentioned below:.
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State the difference between generator and alternator Generator and alternator are two devices, which converts mechanical energy into electrical energy.
Storage batteries are used for various purposes, some of the applications are mentioned below: Electrical engineering It''s the best site for increasing our knowledge in electrical field ,so I''m satisfied in this site.
Pabitra Pradhan Electrical work question How ,can make, in Electrical current in personal house in 5 kva sushil kumar kushwaha Electrical work question How ,can make, in Electrical current in personal house in 5 kva Name sushil kumar kushwaha Usually denoted by R.
Reactance is the resistance offered to the ac currents by inductors and capacitors only. Usually denoted by X. Preethi Electrical If it is short circuited what will be the value of current?? Electrical What are the disadvantages of low frequency?
Hamid raza MAHA Neutral and Earth Neutral - It is used as a return path for AC systems to complete the circuit for current to flow. Earth - It is used for safety purposes. Earthing wire is directly connected to the actual earth so that fault current can flow straight to earth without harming the person. Eric Sheffer Electrical world It's very useful question and answers.
And also update more information about the circuit calculation karthick N Question Why sub stations are rated as 11kw and 22kw why not as 10 kw or 13kw? Nik T Machine Transformer ac and dc motor and others Shivam Single line diagram? Kishor Babasaheb Phasale Electrical Engineering what happens when 2 ideal dc voltage source of unequal magnitude are connected in parallel?
Chandan Ac n dc motor Mr. Sunil ac is generate a flux and frequency and in a dc not play Flux because dc is play on a strat Akshay kumar gupta Can help me to determine the demand factor for 6 chillers, each on has 60 kw? Electrical machine I m writing this comment in reference to question no. Here the ans. Is not clearly explained Mohammed Hamza Shaikh Elec engg Interview question for electrical engg Aman What is the different between digital phase converter and ordinary phase converter?
What is inrush current? MCB is miniature circuit breaker which is thermal operated and use for short circuit protection in small current rating circuit.
ONAN oil natural, air natural. The motor which work or act on the applied input pulse in it, is called as stepper motor. When a large fault occurs in a network, it is easier to interrupt in an AC system, as the sine wave current will naturally tend to zero at some point making the current easier to interrupt.
These wires are made of materials such as Constantan and Manganin because of their high resistivity, and low temperature coefficients.