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Cylindrical rotor alternators have mcq

WebMCQs on Synchronous Motor 1. Synchronous motors generally have salient pole rotor smooth cylindrical rotor either the salient pole rotor or smooth cylindrical rotor none of the above Correct Answer 2. Number of slip rings in a 3-phase synchronous motor will be 0 1 2 3 or 4 Correct Answer 3. WebSHOW ANSWER. 25. If the driving power from the prime-mover driving an alternator is lost but the alternator remains connected to the supply network and field supply is on, then the alternator will. (a) behave as an induction motor but will rotate in an opposite direction. (b) behave as a synchronous motor and will rotate in the same direction.

Derivation of Various Power Conditions in Alternators ... - Electrical4U

WebAlternators can be classified into the following two types according to its rotor construction Smooth cylindrical type alternator Salient pole alternator 5. Why do cylindrical Alternators operate with steam turbines? Steam turbines are found to operate at fairly good efficiency only at high speeds. WebThe below list provides all the multiple-choice questions related to the electrical alternators. Answers are available at the bottom of the article. 1. If the voltage of one of … dash valley scratch https://heavenly-enterprises.com

Synchronous Motor MCQ - Your Electrical Guide

WebJun 6, 2024 · Show Explanation Ques 52. Two alternators rated 40 MVA and 60 MVA respectively are working in parallel and supplying a total load of 80 MW. Speed regulation of both the alternator is 5%. The load sharing … WebDec 10, 2024 · Rotor. There are two types of rotor, smooth cylindrical type and salient pole type. Smooth Cylindrical type alternator. The rotor consists of a smooth solid steel cylinder, having a number of slots along its outer periphery for hosting the field coils. They do not have projected poles, instead, it has a uniform length in all directions, giving a … Web26. In turbo-alternators, smooth cylindrical type rotors used have long axial length because (a) it gives smooth running of the rotor (b) it reduces windage loss (c) … bitesize pediatric dentistry ny

100 MCQ of Synchronous Generator or Alternator with

Category:MCQs on Synchronous Motor - Electrically4U

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Cylindrical rotor alternators have mcq

Synchronous Machines - Electrical Engineering (MCQ) questions …

WebAug 19, 2024 · Home alternator MCQ Alternator Objective Questions With Explanation Part-1 August 19, 2024 1. The speed of a 4-pole 60 Hz synchronous machine will be A. …

Cylindrical rotor alternators have mcq

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WebFeb 4, 2024 · The salient pole and cylindrical or round rotor are two types of synchronous machines. In an alternator or synchronous generator various losses occur such as … WebA cylindrical rotor alternator has a comparatively long axial length and a small diameter. The other names of the cylindrical rotor alternators are turbo-alternators or turbo-generators. They are always installed in a horizontal configuration. The followings are the features of the cylindrical rotor.

WebNov 25, 2024 · In synchronous generators or alternator, generally salient-pole type of rotors is driven by hydro-turbines and cylindrical type rotors are driven by steam … WebThe rotor is the rotating part of the alternator. It is made in a cylindrical shape that has copper windings also known as field winding. The field windings are electromagnets that generate the necessary rotating …

WebThis type of Rotor is used for steam-driven alternator i.e turbo alternator which runs at very high speed. The Rotor is made up of smooth solid forgings of alloy steel cylinder having the number of slots along the outer periphery. The field windings of cylindrical type rotor are connected in series to the slip rings through which they are excited by the DC … WebJun 6, 2024 · An alternator is generating power at 210 V per phase while running at 1500 RPM. If the speed of an alternator drops to 1000 rpm the generated voltage per phase will be. Ques.23. An alternator is said to …

WebAug 3, 2024 · Difference between Cylindrical Rotor and Salient Pole Rotor Synchronous Generator - A synchronous generator, also called alternator, is a most widely used electric generator that produces alternating current supply. It is the main component of every power generating station. Based on the rotor construction, the synchronous generators are of …

WebAnswer Explanation 2) The open circuit voltage and short circuit current of a 3 phase, star connected alternator are 1050 V and 250 A respectively. Its field current is 12 A. Then the synchronous impedance of alternator will be a. 1.34 ohm b. 1.69 ohm c. 2.42 ohm d. 2.85 ohm Answer Explanation bitesize persuasive writing ks2WebOn the other hand, cylindrical rotors are used for turbo alternators running at high speed as 3600 RPM or 1800 RPM. ④ Alternators are also called Synchronous generators … bitesize persuasive writinghttp://www.electricalunits.com/mcq-alternator-and-synchronous-motors-page-3/ dash used in sentenceWeb20. The synchronous motor meets increase in load by taking more armature current as. (a) the rotor pole falls back relative to the stator pole causing an increase in motor current. (b) the back emf decreases causing an increase in motor current. (c) rotating field is strengthened causing an increase in motor current. bitesize percentages ks2WebIn this MCQ you can learn and practice Cylindrical Rotor Alternator objective quiz questions to test your knowledge on electrical machines. … dash velocityWebused for low-speed alternators. Used for high-speed turbo-alternators. Has projecting poles. Has no projecting poles. Needs damper windings. Do not need damper windings. … bitesize periodic table ks3WebAlternator MCQ Synchronous Generator MCQ 151. Consider the following statements Salient pole alternators have small diameters and large axial lengths. Cylindrical rotor alternators have a distributed winding. Cylindrical rotor alternators are wound for … dash uses grammar