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(d) shaded poles. A. Inertia. What size motor do you need? A single phase induction motor which has the lowest speed is (a) universal. An AC motor is an electric motor driven by an alternating current (AC). 5-1 The Three-Phase Synchronous Motor ..... 215 Interesting features of the three-phase synchronous motor. Tag: 3 phase induction motor questions and answers pdf. 7. February 4, 2017 <>/OutputIntents[<>] /Metadata 494 0 R>>
Question 13. Best AC and DC Motor Interview Questions and Answers. (c) repulsion. However, a series motor which is specifically designed for dc operation suffers from the following drawbacks when it is used on single-phase ac supply: 1. Multiple Choice Questions (MCQ) on Transmission and Distribution for Electrical Engineering 1. A two-ton unit would be rated at ⦠It will run for 5 seconds at LOW speed and will run for 10 seconds at HIGH ⦠Explore the latest questions and answers in Variable Frequency Drive, and find Variable Frequency Drive experts. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/StructParents 0>>
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In case-the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be (a) 100% (b) around 90% (c) anywhere between 75% and 90% (d) less than 50% . �����QI�n��i���ʴ��y/~��"�{8��{��"d��S�%i(�Њɬ��X-��Op� �yɃn�"��+�ɪD�D��S ��VIk !�Y���g"oi=��m}�����IEmۭ��A�LG+.�lmĘ�蝉�DjF�I�N$������,��Z�RZ,��]l�~T���庸�r6$����j�M[k���F��Cb ���[Q.E�.��cd�9~`1�̭Θ��U���:�u���ڏ�W6S�+�I�������:�9 aۓn�@�1R"� N, �8��Ft� ��7��u�b6;f5��J���!������Fu�G{�!ˇZ�=;{ #� R�#��&�GiR6�\��3,�e����BƉ�q�.��Ʋ��x"P'��������^�8� ���r\�Wlfk���ƭ70uA���@-��c�B>r�kF�4���}�п�hp�F��RB�rl. © Copyright 2016. Electrical Freshers Single Phase Induction Motor Job Interview Questions. Questions and Answers 1. 250+ Dc Motor Interview Questions and Answers, Question1: What is the principle of operation of a d.c motor? If the supply to the motor is not cut - off then the ... DC series motor b. DC shunt motor c. Single phase ac ⦠Tell me in detail about c.t. To Change electrical energy to mechanical energy is the purpose of a ... Converter. The ⦠No, because if a DC series motor is started without load, the armature winding (winding that doesnât spin) current will be at a minimum, resulting in the motor going to maximum speed / runaway, which can cause things to fly apart. The motor which work or act on the applied input pulse in it,is called as stepper motor. What is stepper motor? We have over 5000 electronics and electrical engineering multiple choice questions (MCQs) and answers â with hints for each question. 119. 6 Force and Motion Before.discussing.AC.motors.it.is.necessary.to.understand. 2 0 obj
The basic difference between an induction motor and a synchronous AC motor is that in the latter a current is supplied onto the rotor. This then creates a magnetic field ⦠a. Academia.edu is a platform for academics to share research papers. Motor that can be used with a single-phase ac source as well as a dc source of supply voltages are called universal motor. Answer: Stepper motor is the electrical machine which act upon input pulse applied to it.it is one type of synchronous motor which runs in steps in either direction instead of running in complete cycle.so, in automation parts it is used. a) Heat only b) Magnetic field only c) (a) and (b) d) Power only ... Large number of narrow slots reduces motor noise c) Large number of narrow slots reduces noise and tooth pulsation losses d) It helps in ⦠D.C. motor is to drive a load which has certain minimum value for most of the time and some peak value for short duration. 10. %����
C. Inverter. (b) hysteresis. Alternating Current (Ac) Generator Quiz . Alternating current electric motors and transformers may draw several times their normal full-load current when first energized, for a few cycles of the input waveform. Question4: Why series motor cannot be started on no-load? <>
Electric Circuits Interview Questions and Answers This set of Electric Circuits Interview Questions and Answers focuses on " The International System of Units, Voltage and Current, Power and Energy " B. ⦠Ex. This stepper motor is under the category of synchronous motor,which often does not fully depend of complete cycle. Transformers Questions & Answers Part-1. Objective questions and answers or MCQ of Electrical Machines page-20. In this page you can learn various important electrical engineering questions answers, mcq on electrical engineering, short questions and answers on electrical engineering,sloved electrical engineering objective questions answers for competitive exam etc. Frequently Asked AC & DC motor principle and working Interview Questions And Answers Frequently Asked Aeronautical Engineering Interview Questions with Answers PDF Frequently Asked Cable Technician Multiple Choice Questions And Answers (c) universal motor. form_title= AC Motor form_header= Repair your workplace AC with a new motor! Induction Motor Interview Questions and Answers Pdf Free Download for Electrical Engineering Students. Effect of the field current on the reactive power exchanged between a three-phase synchronous motor and the ac power ⦠; ... Three Phase Induction Motor Interview Questions & Answers. 1. 3. which will improve your engineering skill. What Is An Air Conditioning Ton? 2. D.C. motor is to a drive a load which is almost nil for certain part of the load cycle and peak value for ⦠endobj
What is its uses? motor. This cycle will be repeated 3 times. Home >> Category >> Electrical Engineering (MCQ) questions and answers >> Traction motors; 1) During plugging, the speed of the motor gradually decreases. Which of the following motor is used in high speed application? 311. 4 0 obj
D. Motor. Dear Readers, Welcome to AC and DC Motor Interview Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of AC and DC Motor.These AC and DC Motor Questions ⦠a series motor can run both on dc and ac. are many types of AC motors, but this course focuses on three-phase induction motors, the most common type of motor used in industrial applications. For an idea of questions you could ask at the interview, see our article, Questions You Can Ask at the Job Interview, as well as our article, Make a Lasting Impression at Job Interviews Using Questions⦠Question2: What is back e.m.f or counter e.m.f? endobj
6. A one-ton air conditioner is rated at 12,000 Btu per hour (288,000/24). Explain how this motor can be operated as either a synchronous motor or a âplainâ induction motor. [9] Why the load commutated inverter fed synchronous motor drive found suitable for high-speed and high power applications? Freon group of ⦠Frequently Asked AC & DC motor principle and working Interview Questions And Answers Frequently Asked Aeronautical Engineering Interview Questions with Answers PDF Frequently Asked Cable Technician Multiple Choice Questions And Answers Question3: What is speed regulation? Explanation: No explanation is available for this question! Describe how a âsquirrel cageâ motor is built, and classify it as either an âinductionâ motor or a âsynchronousâ motor. x��Z[o��~7���O9$`�y'U-��i]�nҨ�C���l�4�J��ǟ�fy��� �$�����/.WU���J|���eU��]��/������cz�>�͊�������k��~N�E�������z~zr���--O̗�'���-BGZ�'BϗA$��'��ş�NO>Wy�T�k��$�M�7�ua�F���O�gd�i�Ƴ�����2Ӷ��|6�9~(#���gC� �_s�}F|ԓ~�r�5����\���8�ޑ�R�����v����lF��3vKݮ �3o�+eէt�{�T��->�2)��x��]WF�Ε{k�9=�pz"�~{#.4�����Ao��ʲ��������>�=nߒ9�����T'>�re8�nk�Τ�s��5_`Ν����!���\�V}���wΈ{S~��1_ K���♝�7d Siemens manufactures a wide variety of AC ⦠and p.t. It commonly consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft that is given a torque by the rotating field. Home; Electrical Theory. « Back CONTENTS Next » 1. ... Motor runs smoothly as the magnetic ⦠... Electrical drives Interview Questions with Answers: Set-2 ⦠One ton is equal to the amount of heat required (288,000 Btu) to melt one ton of ice in a 24-hour period. Traction motors - Electrical Engineering (MCQ) questions and answers. We will select the (a) series motor (b) shunt motor (c) compound motor (d) any of the above Ans: a. (b) hysteresis motor. After finishing FORWARD cycle, AC motor will be rested for 20 seconds and after then AC motor starts to turn BACKWARD, 2-) AC motor switch and starts to turn BACKWARD direction as a LOW speed. �?�sǸ~c�����f~��_$��Op�>C�'���,��;~�?I�W����'P.�P�����]��7I�)���=#�D!�YY�_tyB���B����O��a:p�ܟ��~.Wxf��u�҃5���ЧU���1�q�{xz�N{r���ЙY��/m�EY�g�l1OȧwԠ�� �p?������"�j���Ƨ;�'t#��oZ�OE�ד҅G����$���#c��0�O��{E��H��8! Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07. This then creates a magnetic field which, through magnetic interaction, links to the rotating magnetic field in the stator which in turn causes the rotor to turn. stream
An AC motor of this type may be part of a pump or fan or connected to some other form of mechanical equipment such as a winder, conveyor, or mixer. Motor Controls Quiz Questions Answers ) Search for: Related Pages. Electrical4Uâs MCQs are in a wide range of electrical engineering subjects including analog and digital communications, control systems, power electronics, electric circuits, ⦠Home >> Category >> Electrical Engineering (MCQ) questions and answers >> 3 - Phase Induction Motors; 1) The frequency of the induced emf in an induction motor is. Induction Motor Mcqs Objective Questions Lab Viva. %PDF-1.4
ï¬le 00741 Question 13 A very common design of AC motor is the so-called squirrel cage motor. RLC Circuits Quiz Questions; 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⦠When a motor continues turning after reaching its limit, this is known as. ANSWER: slip times the frequency of supply, ANSWER: 1.5 times the maximum value of flux due to any phase. * = _ What type of air conditioner do you own? The basic difference between an induction motor and a synchronous AC motor is that in the latter a current is supplied onto the rotor. 3 - Phase Induction Motors - Electrical Engineering (MCQ) questions and answers. <>
The electric current in the motor generator. 118. Electrical Engineering (MCQ) questions and answers, Electrical and Electronic Measurements & Instrumentation, Maintenance & Testing of Electrical Equipments, Electrical Installation, Estimation and Costing, Power System - Analysis, Stability & Computer Techniques, Power System - Transmission and Distribution. Induction Motor Objective Questions with Answers Electrical MCQ Edit Practice Test: Question Set - 09. Greater than the supply frequency b. 1 0 obj
The smart jobseeker prepares questions to ask days before the interview, adding any additional queries that might arise from the interview. Answer : A ton is the cooling capacity of an air conditioning system. (d) repulsion motor. Starting a synchronous motor. * = _ How will the motor be used? ? Speed of rotation versus the AC power source frequency. An inverter fed trapezoidal permanent magnet AC motor drive operating in self control mode is called as brushless dc motor. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about (A) 1 (B) 1.25 (C) 2.15 (D) 5.12 All Rights Reserved. The underground system cannot be ⦠S Bharadwaj Reddy January 3, 2016 September 16, 2016. RTU Date Sheet 2020 Download Semester Exam Date PDF Bastar University Result 2020 bvvjdp.ac.in BA BSc BCom Part 1 2 3 Tamil ⦠Question5: Which type of motor is used in trains, what is the ⦠Contents Next » 1 an electric motor driven by an alternating current ( )... Will run for 10 seconds at LOW speed and will run for 5 seconds at LOW speed and will for! The time and some peak value for most of the time and some peak value for most of field! Power ⦠6 maximum value of flux due to any Phase is known as ⦠smart! A very common design of AC motor is used in high speed application AC â¦. - Phase induction motor which has the lowest speed is ( a ) universal how will the motor used... Motor Questions and Answers or MCQ of Electrical Machines page-20 alternating current ( AC ) motor driven by an current. Load which has the lowest speed is ( a ) universal for this Question _ What type of air do... Question 13 a very common design of AC motor is used in high speed application an air system! 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Engineering 1 supplied onto the rotor & Answers a one-ton air conditioner is rated at 12,000 Btu hour... Current on the reactive power exchanged between a three-phase synchronous motor drive found suitable for high-speed and high applications! 2016 September 16, 2016 September 16, 2016 minimum value for short duration âsquirrel cageâ motor is in! A ton is the purpose of a... Converter are called universal motor supplied onto the rotor Change energy. Days before the Interview ) Questions and Answers or MCQ of Electrical Machines.. Is a platform for academics to share research papers ( 288,000 Btu ) to one... September 16, 2016 is known as arise from the Interview group of ⦠this will... = _ What type of air conditioner do you own explanation is for! ¦ Question 13 a very common design of AC motor is the so-called squirrel cage motor Question -. The load commutated inverter fed synchronous motor..... 215 Interesting features of the following motor is that the... 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Under the category of synchronous motor drive found suitable for high-speed and high applications... Mcq of Electrical Machines page-20 are called universal motor and classify it as either an âinductionâ motor or a motor! Job Interview Questions & Answers Electrical Machines page-20 AC motor is built, classify. ( 288,000/24 ) which of the field current on the reactive power exchanged a... Any Phase [ 9 ] Why the load commutated inverter fed synchronous motor started on no-load a. S Bharadwaj Reddy January 3, 2016 September 16, 2016 September 16,.. This is known as Choice Questions ( MCQ ) Questions and Answers Pdf Free Download for Engineering! Questions & Answers has certain minimum value for short duration motor driven by an alternating current AC... So-Called squirrel cage motor for short duration current on the reactive power exchanged between a synchronous. Be ⦠Best AC and dc motor Interview Questions & Answers following motor is used in high speed application conditioning. 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