Cylindrical rotor alternators have mcq

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August undefined, 2024

WebOn 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 … Web20. 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.

Alternator Objective Questions With Explanation Part-1 - Electrical MCQ

WebMar 6, 2024 · Smooth Cylindrical type rotor is generally used for high-speed alternators or turbo-alternators. This is because: These rotors have small diameter and long axial … 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 new piper m500 youtube

Alternator Rotor Types MCQ [Free PDF] - Objective …

Webused 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. … 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 … 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. new pipe roughness

Smooth Cylindrical Type Rotor - Synchronous Generator - MCQs …

Alternator MCQ Synchronous Generator MCQ Page 14 of 18

WebAlternator 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 … WebThe field windings of cylindrical type rotor are connected in series to the slip rings through which they are excited by the DC exciter. The top portion of the slot is covered with the … new piper single engine aircraft for saleWebIn alternators, cylindrical pole type rotors are generally used with prime movers of a) High speed b) Low speed c) Medium speed d) Both low and high speed Ans: (a) 9. An alternator is said to be overexcited when it is operating at a) Unity power factor b) Leading power factor c) Lagging power factor d) Either lagging or leading power factor newpipe on ios

"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. " - Cylindrical rotor alternators have mcq

Cylindrical rotor alternators have mcq

100 MCQ OF Synchronous Generator or Alternator …

WebJun 12, 2015 · Smooth Cylindrical Type Rotor - Synchronous Generator - MCQs with answers Q1. The diameter and axial length of rotors of smooth cylindrical type rotors are a. Small diameter, small axial length b. Large diameter, large axial length c. Large diameter, small axial length d. Small diameter, large axial length View Answer / Hide Answer Q2. 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 …

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http://www.electricalunits.com/mcq-alternator-and-synchronous-motors-page-3/ 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 …

Web100+ Electrical MCQ Questions in Induction Motor 101.In a 3-phase squirrel cage induction motor, skewing of rotor slots reduces a) parasitic torque and noise but increases pull-out torque b) parasitic torque and noise but increases starting torque c)noise but increases pull-out torque and parasitic torque 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 …

WebFeb 24, 2012 · Now let us derive various equations for the power flow the cylindrical rotor alternator. In order to derive various power equation for an alternator let us substitute voltage source E 1 equal to the excitation voltage (E f), voltage source E 2 equals to the terminal voltage (V t), inductive impedance of the above circuit equals to synchronous …

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 …

WebCylindrical rotor alternators have a) Large length to diameter ratio b) Small length to diameter ratio c) Vertical configuration d) None of these Ans: (a) 25. In an alternator, the … introverts don\u0027t want to return to the officeWebAug 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. 1800 r.p.m. B. 2400 r.p.m. C. 3000 r.p.m. D. 3600 r.p.m. Answer: A. 1800 r.p.m. Explanation: In a synchronous machine, Frequency, fs = 60 Hz Number of poles = 4 … newpipe releaseWebThe 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 … introvert selling carsWebStudy with Quizlet and memorize flashcards containing terms like As resistive load increases on an alternator, what must happen to maintain voltage and frequency at the terminals?, The voltage induced in an ac generator depends upon; Field flux, and the speed of the Rotor. True or False, In an alternator, how do salient pole rotors compare to … introvert selling cars memeWebAug 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 … introvert sensing feeling and perceivingWebAug 3, 2024 · Difference between Cylindrical Rotor and Salient Pole Rotor Synchronous Generator - A synchronous generator, also called alternator, is a most widely used … introverts hate summerWebJun 6, 2024 · A cylindrical synchronous machine connected to an infinite bus power will deliver maximum power at a power angle of δ = 0° δ = 90° δ = 45° δ = 30° Show Explanation Ques 64. The maximum power developed in a cylindrical synchronous machine depends on the Load angle Synchronous reactance Excitation Both 2 and 3 … new pipe organ installations