Electrical Engineering MCQs

Page No. 252

An important advantage of a synchronous motor over wound round induction motor is that


a its power factor may be varied at will


bits speed is independent of supply frequency


cits speed may be controlled more easily


dnone of the above



The angle between the rotating stator flux and rotor poles is called _________ angle.


a synchronizing


bobtuse


ctorque


dpower factor


View Answer torque

Slip-rings in a synchronous motor carry____________?


adirect current


balternating current


cno current


dall of the above


View Answer direct current

A synchronous motor working at leading power factor can be used as____________?


avoltage booster


b phase advancer


cnoise generator


dmechanical synchronizer


View Answer phase advancer

The standard full-load power factor ratings for synchronous motors are___________?


azero or 0.8 leading


bunity or 0.8 lagging


cunity or 0.8 leading


dunity or zero


View Answer unity or 0.8 leading

The rotor copper losses, in a synchronous motor, are met by____________?


ad.c. source


barmature input


cmotor input


dsupply lines


View Answer d.c. source

A synchronous motor will always stop when:______________?


asupply voltage fluctuates


bload in motor varies


cexcitation winding gets disconnected


dsupply voltage frequency changes



The speed regulation of a synchronous motor is always___________?


a1%


b0.5%


cpositive


dzero


View Answer zero

. In a synchronous motor which loss varies with load ?


aWindage loss


bBearing friction loss


cCopper loss


dCore loss


View Answer Copper loss

For V-curves for a synchronous motor the graph is drawn between:_______________?


a armature current and power factor


bterminal voltage and load factor


cpower factor and field current


d field current and armature current



Goto Page No.

Page 252 of 366

Alphabetical MCQs Categories

Here below You find all kind of categories of MCQs in alphabetical order.


"Comprehensive Collection of MCQs: Alphabetically Organized by Subject"

"Discover an extensive collection of multiple-choice questions (MCQs) neatly categorized by subject from A to Z. This resource is designed for anyone eager to explore various topics in a straightforward and organized manner. Whether you're a student preparing for exams, an educator seeking supplementary materials, or simply curious about different subjects, this compilation offers a convenient way to learn and assess your knowledge. With questions arranged alphabetically, navigation is effortless, allowing you to delve into subjects of interest at your own pace. Engage, learn, and expand your understanding with this accessible and comprehensive repository of MCQs!"


BolPakistan

bolpakistan.com.pk includes Job Mcqs and Pak Mcqs is the Top Largest Mcqs Forum in World, in which you can read Mcqs of All Subjects, PPSC test preparation, FPSC, NTS and PPSC PAST PAPERS, PPSC PAST MCQS. A Collection of Repeated MCQs for JOBs seekers.

Copyright © 2024, Designed & Developed by BolPakistan