Electrical Engineering MCQs

Page No. 264

If the capacitor of a single-phase motor is short-circuited_________?


athe motor will not start


bthe motor will run


c the motor will run in reverse direction


d the motor will run in the same direction at reduced r.p.m



In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to_______________?


aimprove power factor


bincrease overload capacity


creduce fluctuations in torque


dto improve torque


View Answer improve power factor

In a split phase motor, the running winding should have?


ahigh resistance and low inductance


b low resistance and high inductance


c high resistance as well as high inductance


dlow resistance as well as low inductiance



In capacitor start single-phase motors____________?


a current in the starting winding leads the voltage


bcurrent in the starting winding lags the voltage


ccurrent in the starting winding is in phase with voltage in running winding


dnone of the above



In a capacitor start motor, the phase displacement between starting and running winding can be nearly__________?


a 10°


b30°


c60°


d90°


View Answer 90°

Which of the following motor will give relatively high starting torque ___________?


aCapacitor start motor


bCapacitor run motor


c Split phase motor


d Shaded pole motor


View Answer Capacitor start motor

Insertion of resistance in the stator of an induction motor___________?


aincreases the load torque


bdecreases the starting torque


c increases the starting torque


dnone of the above



The starting torque of a three phase induction motor can be increased by__________?


aincreasing slip


bincreasing current


c both A. and (b)


dnone of the above


View Answer both A. and (b)

The rotor of an induction motor runs at__________?


asynchronous speed


b below synchronous speed


cabove synchronous speed


dany of the above



In a star-delta starter of an induction motor___________?


aresistance is inserted in the stator


breduced voltage is applied to the stator


cresistance is inserted in the rotor


dapplied voltage perl stator phase is 57.7% of the line voltage



Goto Page No.

Page 264 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