It is an electrical device designed to initiate the isolation of a part of the electrical installation, or to operate an alarm signal, in the event of abnormal condition or a fault. It has to be ideally … 2. As with all challenging interview questions, an employer will observe your voice and body language, since they’ll indicate how well you cope under pressure. Learn what a Power System is, and the basics of Electrical Power Systems. Using Fuse we can protect the power supply against over current. BPO & … This is most general interview question related to power supply. Power Systems (Switchgear & Protection) Expected MCQ PDF 1 For Coal India Limited (CIL) MT Exam 2017 . POWER-SYSTEM PROTECTION 15.3 2. I was interviewed by two persons. Power transformers generally operate at nearly full – load. The power system is responsible for the production of electricity with the help of energy such as coal and diesel. Electrical Power System Interview Questions ; Question 16. 1) What is / are the main disadvantage of using oil as the quenching medium in the circuit breakers? Q2) What is Cryptography? Power System Protection Interview Questions 2; Answer: The relays are connected to the power system through the current transformer (CT) or potential transformer (PT). The power system consists of a three-stage network – generation, distribution, and transmission. Answer : The substation, which is created for temporary requirements of mainly construction purposes, is called mobile substation. Previous Article Why Starting Current of Induction Motor is High . Find the phase and residual relay currents. In this post provide you latest and updated 2018 Electrical MCQ Objective Questions with answer which are help for preparation all electrical engineering exams like GATE, IES, JTO, PSUs, RRB JE/AEN, RRB loco pilot and technicians, SSC JE, DMRC, LMRC, ISRO and other state level engineering exams. Harikesh Yadav March 10, 2017 EE MCQ PDF, General. ups is also two types : on line and offline . Why AC systems are preferred over DC systems? These questions are basics and any candidate should possess basic knowledge of these aspects. Power System Protection and Relays Questions & Answers . To maintain continuity of supply the breaker should not trip in such condition. A. A distribution transformer may have one primary and one divided or “Tapped” secondary, or two or more secondaries. Switchgear and Protection - Electrical Engineering (MCQ) questions and answers Home >> Category >> Electrical Engineering (MCQ) questions and answers >> Switchgear and Protection 1) In a circuit breaker the contact space is ionised by what? ET Prime Women Leadership Awards. What is fault clearance time? Let’s start. What is a System? Risk of formation of explosive mixture with air. 13. Electrical Safety - Power System . Business News › Jobs › 13 interview questions that can decide your future. Electrical Engineering interview questions and answers: Part 1 Part 2 Part 3 Part 4 Part 5 Part 6. Home » Power System Protection and Relays Questions & Answers. generators, transformers etc.) Electrical Engineering Interview Questions ; Question 25. Next Page . 3 Electrical machines and Power Systems 8 or 9 questions 4 Electronics 8 or 9 questions 5 Fundamentals of Communication 8 or 9 questions 6 Control System Fundamentals 8 or 9 questions Total 50 questions. c. Possibility of causing fire hazards. ET Power Talks. This interview question for technical support tests your knowledge and if you updated with the latest technological trends. Question #1. State the difference between generator and alternator 3. Figure shows a single line diagram of a radial system for a DC distribution where a feeder OC supplies a distributor AB at a point A. Low power factor means losses will be more.it is the ratio of true power to apparent power. Cyber Security Interview Questions and Answers Q1) Define Cybersecurity? Open Up India. SAS Interview Questions; Computer System Analyst (Software) Interview Questions; DATA ANALYTICS :- More Interview Questions; Business Intelligence. Ans. We have planned to give you 100 Interview Questions on Power Transformer. The lightning surges may cause serious damage to the expensive equipments in the power system (e.g. Q. Questions (27) ... Power System Protection. 4. What is protective relay? Again, assume that the A phase cur- rent is at 0°. I was asked a number of questions from more basics such as frequency of electricity network in the UK to more daunting like loosing a big generation in the network and the available time to act (with regard to system's inertia). Please click on the Red Plus Icon to know the answer. 83. Planning Engineer team reviewed questions and answers to remove duplicated ones, added more explanations and graphs to the answers, and produce the final product in a good shape. 1. online ups having high volt and amp for long time backup with with high dc voltage.but ups start with 12v dc with 7 amp. This year, POWER was named the number 3 firm in the power … Great Manager Awards. Explain differential protection? Power System Protection and Relays 2 What is Relay Time? And electrical engineering & electronics engineering ?
Answer:uninterrupt power supply is mainly use for short time . What Are The Main Equipments And Accessories Used For Substation? Therefore, breaker should be able to carry high current safely for some for some specified period during running i.e. Frequently asked interview questions with answers under the subjects like electrical machines,Transmission and distribution,Power electronics and some general basic questions. Device drivers are also a piece of software that considered mandatory to run the hardware components in the system. 13 interview questions that can decide your future. Interview. Name the latest computer processors? Cybersecurity refers to the protection of internet-connected systems such as software, hardware, electronic data, etc., from cyber attacks. Hive Interview Questions ; Datastage Interview Questions; Oracle Warehouse Builder Interview Questions; Tableau Interview Questions; Apache Storm Interview Questions; Business Intelligence :- More Interview Quetions; Support. Air blast circuit breakers for 400 kV power system are designed to operate in (a) 100 microsecond (b) 50 millisecond (c) 0.5 sec (d) 0.1 sec Ans: b. 84. Jobs Building “A” is supplied with 120/240 volt single-phase power from building “B” on the same property. Highly-cited researchers. Differential protection is based on the fact that any fault within an electrical equipment would cause the current entering it, to be different, from that leaving it. Answer: Relay time is the interval between the occurrence of the fault and the closure of the relay contacts is called relay time. An example of a Power System is the Electrical Grid that provides power to homes and industry within an extended area. Each year, ENR ranks the top 500 design firms in the United States based on annual revenues. Next Article Transformers Questions … Electrical Q & A. “B” is supplied from a three-wire with two ungrounded conductors and one neutral without any metallic water pipe or other metal equipment connections to the building or equipment ground fault protection installed. Answer: When the fault occurs relay operates and close the trip coils and circuit breaker operates and open the contacts subsequently and fault is cleared. means according to ups VA it gives backup. Advertisements. A power transformer usually has one primary and one secondary, and one input and output. Review a list of frequently asked Electrical interview questions for electrical graduates. To know the answer in detail, click on the link given in the answer. Aside from the fact that most of these are silly questions for a technical job interview, the answer provided to your second question is just plain wrong. [2] How to provide Over current protection in a power supply? 13 interview questions that can decide your future. power systems relay questions; power system protection question and answers pdf; protective relay and circuit breaker interview question; protective relay isolation; POWER SYSTEM PROTECTION QUESTION AND ANSWER PDF; what is torque control in protective relay; Share on. How to answer. The circuit has an A phase to ground fault on the line, with fault current magnitude of 9000 A. SECTIONS. Switchgear protection plays a vital role in modern power system network, right from generation through transmission to distribution end. Need periodical replacement. … POWER ranks among nation’s top design firms Leading industry magazine Engineering News-Record has ranked POWER Engineers Incorporated (POWER) among the top 100 engineering design firms in the country for the 15th year in a row. 5. By . Interview question for Management Trainee in Greater Noida.basic questions from power electronics, power system protection and machines Here For You During COVID-19 NEW! d. … 1.Why star delta starter is preferred with induction motor? In this topic you will find the most common Questions and the Model Answers that you may expose to in your Interview for a Planning Engineer Position. Previous Page. The radial system is employed only when power generated at low voltage and substation is located at the center of the load. ETRise Top MSMEs. b. either by direct strokes on the equipment or by the strokes on the transmission lines that reach the equipment as travelling waves. We have to … In a computing text, it is referred to as protection against unauthorized access. What Is Called Mobile Substation? You could mention: punctuality, work ethic, team-working skills, interpersonal skills. Describe the skills and competencies that make you a perfect fit for the role, advises Kim Whitfield, head of resourcing at M&S. HR Interview Questions; Computer Glossary; Who is Who; Electrical Safety - Quick Guide. Overfluxing protection is recommended for (a) distribution transformer (b) generator transformer of the power plant (c) auto-transformer of the power plant (d) station transformer of the power plant Ans: b. Double end fed power system 2. This is starting question and the interviewer will go in depth in each section. Electrical Engineering Objective Questions MCQ with Answer Free Pdf Download. We will go on adding questions, till we reach 100 and may be we will add more than 100. Varuni Khosla & Brinda Dasgupta, ET Bureau Last Updated: Jun 11, 2016, 05:00 PM IST. Kuwait Society Of Engineers 2018 Fundamentals of Electrical Circuits: - Circuit variables and elements - Circuit laws and simple resistive circuits - Inductance and Capacitance - … Answer: Eletro-mechanical relays operate by two principles. Electrical Power System Interview Questions ; Question 24. a. Explore the latest questions and answers in Power System Planning, and find Power System Planning experts. In India, industry uses 415 Volts 3 phase AC power at 50 Hz. Ring main feeder system. Electrical Interview Questions & Answers visit www.eeekenya.com Page | 1 ... Power factor should be high in order to get smooth operation of the system. point A in this case. What are different types of principles of operation of electro-mechaical relays? Obviously the distributor is fed at one end only i.e. Ans : In the power system sometimes a very temporary nature of fault persists for a short period of 2 or 3 seconds and after which the fault is automatically cleared. 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