ELECTRICAL ENGINEER INTERVIEW QUESTIONS PDF
20 Electrical Engineering Interview Questions & Answers An RLC circuit carries an electrical circuit consisting of a resistor (R) and inductor (L) and a capacitor (C), connected in parallel or series. Download PDF. Electrical Engineering interview questions and answers pdf free download for freshers & Experienced,eee questions mcqs viva objective faqs. Electrical engineering Interview Questions and Answers - Free download as PDF File .pdf), Text File .txt) or read online for free.
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EEE_ Technical Interview Questions. 1. Why star delta starter is How can you relate power engineering with electrical engineering? Power engineering is a. Whether you are preparing to interview a candidate or applying for a job, review our list of top Electrical Engineer interview questions and answers. Electrical Engineering Interview Question And Answer-Basic Electrical Part 1 · Electrical Engineering Important Interview Questions With Answers PDF.
This microprocessor, called a digital signal processor DSP , monitors the phase conversion process, continually adjusting the input and output modules of the converter to maintain perfectly balanced three-phase power under all load conditions.
Explain the operation of variable frequency transformer?
A variable frequency transformer is used to transmit electricity between two asynchronous alternating current domains. A variable frequency transformer is a doubly-fed electric machine resembling a vertical shaft hydroelectric generator with a three-phase wound rotor, connected by slip rings to one external ac power circuit. A direct-current torque motor is mounted on the same shaft.
Changing the direction of torque applied to the shaft changes the direction of power flow; with no applied torque, the shaft rotates due to the difference in frequency between the networks connected to the rotor and stator. The variable frequency transformer behaves as a continuously adjustable phase-shifting transformer. It allows control of the power flow between two networks.
ELECTRICAL ENGINEERING INTERVIEW QUESTIONS AND ANSWER
What is the main use of rotary phase converter? Rotary phase converter will be converting single phase power into true balanced 3 phase power,so it is often called as single phase to three phase converter. Often the advantages of 3 phase motors, and other 3 phase equipment, make it worthwhile to convert single phase to 3 phase so that small and large consumers need not want to pay for the extra cost of a 3 phase service but may still wish to use 3 phase equipment.
Use of switch mode power converter in real-time basis? Switch mode power converter can be used in the following 5 different ways step down an unregulated dc input voltage to produce a regulated dc output voltage using a circuit known as Buck Converter or Step-Down SMPS, step up an unregulated dc input voltage to produce a regulated dc output voltage using a circuit known as Boost Converter or Step-Up SMPS, step up or step down an unregulated dc input voltage to produce a regulated dc output voltage, invert the input dc voltage using usually a circuit such as the Cuk converter, and produce multiple dc outputs using a circuit such as the fly-back converter.
Which type of oil is used as a transformer oil? Transformer oil, or insulating oil, is usually a highly-refined mineral oil that is stable at high temperatures and has excellent electrical insulating properties. It is used in oil filled transformers, some types of high voltage capacitors, fluorescent lamp ballasts, and some types of high voltage switches and circuit breakers.
Its functions are to insulate, suppress corona and arcing, and to serve as a coolant. Well into the s, polychlorinated biphenyls PCB s were often used as a dielectric fluid since they are not flammable.
They are toxic, and under incomplete combustion, can form highly toxic products such as furan.
Starting in the early s, concerns about the toxicity of PCBs have led to their banning in many countries. Today, non-toxic, stable silicon-based or fluoridated hydrocarbons are used, where the added expense of a fireresistant liquid offsets additional building cost for a transformer vault. Combustion-resistant vegetable oil-based dielectric coolants and synthetic pentaerythritol tetra fatty acid C7, C8 esters are also becoming increasingly common as alternatives to naphthenic mineral oil.
Esters are non-toxic to aquatic life, readily biodegradable, and have a lower volatility and higher flash points than mineral oil. If we give A, V on Primary side of 1. Mcb specification are done on maximum current flow in circuit. What is the full form of KVAR?
What is excitation? Excitation is applying an external voltage to DC shunt coil in DC motors. In three pin plug 6 Amp. Because Current flow in the conductor is inversely proportional to the conductor diameter. So if any short circuits occur in the system first high currents bypassed in the Earthling terminal.
Difference between megger test equipment and contact resistance meter test instruments? Megger test equipment used to measure cable electric resistance, conductor continuity, phase identification where as contact resistance meter test instruments used to measure low resistance like relays ,contactors. When we connect the large capacitor bank in series? So in order to bring the voltage at the load terminals within its limits i. What is electrical diversity factor in electrical installations?
Electrical diversity factor is the ratio of the sum of the individual maximum demands of the various subdivisions of a system, or part of a system, to the maximum demand of the whole system, or part of the system, under consideration. Electrical diversity factor is usually more than one. Why field rheostat is kept in minimum position while armature rheostat at maximum position? In motors at the time of starting the armature resistance is introduced to reduce the high starting current and the field resistance is kept minimum to have high starting torque.
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. Explain What is rated speed? 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. What is different between resistance grounding system and resistance earthing system? Resistance grounding system means connecting the neutral point of the load to the ground to carry the residual current in case of unbalanced conditions through the neutral to the ground whereas resistance earthing system is done in an electric equipment in order to protect he equipment in occurrence of fault in the system.
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?
We can have the frequency at any frequency you like, but than you must also make your own motors,high voltage transformers or any other equipment you want to use.
How to determine alternating current frequency? Zero crossings of the sine wave to trigger a monostable pulse generator is a way to determine alternating current frequency. A fixed width pulse is generated for each cycle. The more pulses there are per second, the more the energy.
The pulses are integrated filtered or averaged to get a steady DC voltage which is proportional to frequency. This voltage can then be displayed on an analogue or digital voltmeter, indicating frequency.
This method is more suitable than a direct counter, as it can get good accuracy in a second or so. Why electricity in India is in the multiples of 11 like 11kv, 22kv, 33kv? Transformer Induced voltage equation contains 4. So always transmission voltage is multiple of 11 Why we use ac system in India why not dc?
Electrical Engineering Interview Questions
Here on this page, we have tabulated Electrical Engineering Interview Questions with Answers for fresher as well as non-fresher candidates. Right from the inception of electricity and its distributive branches, the discipline of EEE has seen disruptive changes while adapting itself to the rapidly changing technologies.
Experts see it as a microcosm of all things electrical and electronic, without which there would have been literal darkness all over the face of the earth. Alongside the major branches of engineering, the discipline of EEE holds a significant importance in heralding the greatness of the science of engineering as a whole.
For the layman, the branch of Electronic and Electrical Engineering EEE can be defined as the branch of engineering that is associated with the study and applications of electricity, electronics and electromagnetism.
Each and every equipment around you function based on the principles of this science. Its uses run the gamut from the early telegraph and telephone to the highly advanced robotic machinery and artificial intelligence based programming.
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All Courses. All Practice Tests. A function shall have at least one input type argument and shall not have an output or inout type argument;a task can have zero or more arguments of any type. A function shall return a single value; a task shall not return a value.
If a block can be placed anywhere in the cache, the cache is said to be fully associative. It is used when voltage required for testing is higher than the available Question Low cost. Higher Accurate.
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Magnetic losses are caused by eddy currents and hysteresis in the core. The Feedback in Control System in one in which the output is sampled and proportional signal is fed back to the input for automatic correction of the error any change in desired output for futher processing to get back the desired output.
In electronic regulator, triac is employed for speed control by varying the firing angle speed and it is controlled but in rheostatic ,control resistance is decreased by steps to achieve speed control. Sarwer Faisal.