3 phase induction motor questions and answers pdf

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One 208 Volt, 0.75 HP, 3-phase induction motor . One dynamometer with torque controller . One Phase Sequence Indicator . One single-phase wattmeter plus miscellaneous apparatus as needed . 2. Initial Data . Record all nameplate information for the induction motor. You should also make a DC measurement of stator winding line-to-line resistance ... Three Phase Induction Motors MCQs with Explanatory Answers 1. If the frequency of 3-phase supply to the stator of 3-phase induction motor is increased, then Q:In what respect does a 1-phase Induction motor differ from a 3-phase Induction motor? Construction wise a plain 1-phase Induction motor is more or less similar to a 3-phase squirrel-cage Induction motor except that its stator is provided with only 1-phase winding.. Sep 02, 2014 · In three-phase induction motors sometimes copper bars are placed deep in the rotor to (a) improve starting torque (b) reduce copper losses (c) improve efficiency (d) improve power factor Ans: a 65. In a three-phase induction motor (a) power factor at starting is high as compared to that while running Sep 02, 2014 · In three-phase induction motors sometimes copper bars are placed deep in the rotor to (a) improve starting torque (b) reduce copper losses (c) improve efficiency (d) improve power factor Ans: a 65. In a three-phase induction motor (a) power factor at starting is high as compared to that while running Nov 05, 2016 · Tag: 3 phase induction motor questions and answers pdf. Electrical Freshers Single Phase Induction Motor Job Interview Questions. February 4, 2017 • The basic idea of an electric motor is to generate two magnetic fields: rotor magnetic field and stator magnetic field and make the stator field rotating. The rotor will constantly be turning to align its magnetic field with that of the stator field. • The 3-phase set of currents, each of equal magnitude and with a phase Jan 11, 2018 · (Code factor is a number which is reserved for class) For example, all motors of class A have a fixed code factor which should be multiplied with rated HP in the above equation.) V T = Rated voltage. Calculation: Find the starting current of 10 hp, three phase 220 V A class motor. Solution: The maximum kVA/hp for A class motor is 3.15 (code ... 3 - Phase AC Circuits - Electrical Engineering (MCQ) questions and answers Home >> Category >> Electrical Engineering (MCQ) questions and answers >> 3 - Phase AC Circuits 1) In a balanced 3-phase system, if one of the two wattmeter’s reading is negative then the Home >> Category >> Electrical Engineering (MCQ) questions and answers >> 3 - Phase Induction Motors 1) The frequency of the induced emf in an induction motor is a. Introduction: The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. They run at a constant speed from no-load to the full load. Electrical Transformer Quiz Questions; Circuit Breaker Quiz Questions; Motor Controls Basic Theory Quiz ; Earthing / Grounding Quiz Questions; Power Quality Quiz Questions; DC Machines Quiz Questions; Single Phase Motors Quiz Questions; Basic Electronics Quiz Questions; Induction Motor Quiz Questions; Synchronous Machine Quiz Questions; Fuse ... Q:In what respect does a 1-phase Induction motor differ from a 3-phase Induction motor? Construction wise a plain 1-phase Induction motor is more or less similar to a 3-phase squirrel-cage Induction motor except that its stator is provided with only 1-phase winding.. Free online Electrician Practice Test Questions on Induction Motor Theory Quiz ) Leave a Reply Cancel reply. Your email address will not be published. ... The specifications of a 4-pole, 3-ph induction motor: Rated- 3.7 kW, 2.52 kg-m, 1430 rpm, 415 V, 7.27 A. Torque, Starting- 225%, Pullout- 275% of FLT. It is required to control the speed of this ... Aug 08, 2020 · Image Transcriptionclose. Q. A 3-phase, 240 V, 4 pole, 50 Hz, Y- connected induction motor with operating slip of 4% has the following equivalent circuit parameters referred to stator side in O/ph : (R1= 1, X1=3, Xm=50, R2=1, X2=2). The specifications of a 4-pole, 3-ph induction motor: Rated- 3.7 kW, 2.52 kg-m, 1430 rpm, 415 V, 7.27 A. Torque, Starting- 225%, Pullout- 275% of FLT. It is required to control the speed of this ... 3 phase induction motor multiple choice questions 3 phase induction motor multiple choice questions and answers 3 phase induction motor objective questions 3 phase induction motor objective questions answers 3 phase induction motor questions and answers 3 phase induction motor questions and answers pdf 3 phase induction motor short questions control speed of Wound Rotor Motors DC Series Motor ... 3 Phase Induction Motors Objective Questions With Answers - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. Scribd is the world's largest social reading and publishing site. 11. Three-phase induction motor is mainly suitable for which of the following application a) For running different machine tools where several speeds are required > b) For running paper machine requiring exact speed control</br> c) For running electric vehicles</br> d) For running rolling mills needing exact speed control</br> 3 phase induction motor multiple choice questions 3 phase induction motor multiple choice questions and answers 3 phase induction motor objective questions 3 phase induction motor objective questions answers 3 phase induction motor questions and answers 3 phase induction motor questions and answers pdf 3 phase induction motor short questions control speed of Wound Rotor Motors DC Series Motor ... Three Phase Induction Motor MCQ Objective questions & answers are available for an Electrical Engineering students to clear various technical interview, competitive examination, and another entrance exam. Please take a look below at a few. Remember, if you have other questions around electric motors, that were not answered, ask your question here! An Overview of Motor Current Specifications; Electrical Protection of Three-Phase Motors; Induction and Synchronous Motors: Similarities and Differences; Motor Nameplate Information Required by NEMA ... • The three-phase induction motor is the extensively used for various kinds of industrial drives. • AC induction motors are also the most common motors used in main powered home appliances. Advantages of 3 phase induction motor • Generally easy to build and cheaper than corresponding dc or synchronous motors • Induction motor is robust • The basic idea of an electric motor is to generate two magnetic fields: rotor magnetic field and stator magnetic field and make the stator field rotating. The rotor will constantly be turning to align its magnetic field with that of the stator field. • The 3-phase set of currents, each of equal magnitude and with a phase Three phase Induction machine exercises. QUESTION 1 [25] 1.1 With respect to three-phase induction motors, briefly answer the following questions: 1.1.1 Name any four (4) methods of starting an induction motor. (4) 1.1.2 Why is the efficiency of an induction motor so poor at high slip? Nov 05, 2016 · Tag: 3 phase induction motor questions and answers pdf. Electrical Freshers Single Phase Induction Motor Job Interview Questions. February 4, 2017 Feb 14, 2017 · Expected Three Phase Induction Motor Objective Questions MCQ 1-25 Part-1|| Electrical Engg In Hindi ... PDF link for Expected 3-¢ Induction Motor MCQ 1-25 https://goo.gl/EAJVSr ... Synchronous ... Electrical Transformer Quiz Questions; Circuit Breaker Quiz Questions; Motor Controls Basic Theory Quiz ; Earthing / Grounding Quiz Questions; Power Quality Quiz Questions; DC Machines Quiz Questions; Single Phase Motors Quiz Questions; Basic Electronics Quiz Questions; Induction Motor Quiz Questions; Synchronous Machine Quiz Questions; Fuse ... Sep 29, 2020 · QUESTION 1 The electric motor is a 3-phase, 4-pole (per phase) induction motor supplied with 400V and 50 Hz AC. You should select a motor from the WEG catalogue such that the system can transmit a power of at least 12 kW. One 208 Volt, 0.75 HP, 3-phase induction motor . One dynamometer with torque controller . One Phase Sequence Indicator . One single-phase wattmeter plus miscellaneous apparatus as needed . 2. Initial Data . Record all nameplate information for the induction motor. You should also make a DC measurement of stator winding line-to-line resistance ...