Electrical Engineering MCQs

Page No. 274

A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor e.m.f. will be____________?


a 200 Hz


b50 Hz


c 2 Hz


d0.2 Hz


View Answer 2 Hz

In an induction motor, no-load the slip is generally____________?


aless than 1%


b1.5%


c2%


d 4%


View Answer less than 1%

The shaft of an induction motor is made of_____________?


ahigh speed steel


bstainless steel


ccarbon steel


dcast iron


View Answer carbon steel

The torque of an induction motor is___________?


adirectly proportional to slip


binversely proportional to slip


cproportional to the square of the slip


dnone of the above



The frame of an induction motor is usually made of____________?


asilicon steel


bcast iron


c aluminium


dbronze


View Answer cast iron

A D.C. generator works on the principle of____________?


aLenz’s law


bOhm’s law


cFaraday’s law of electromagnetic induction


d none of the above



A series generator can self-excite:______________?


aonly if the load current is zero


b only if the load current is not zero


cirrespective of the value of load current


dnone of the above



The open circuit voltage of a compound generator is 250 V. At full load the terminal voltage____________?


awill be less than 250 V


bwill always be 250 V


cmay be greater or less than 250 V


dnone of the above



The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be____________?


a150 V


bless than 150 V


cgreater than 150 V


dnone of the above


View Answer greater than 150 V

A shunt generator can self-excite:_________________?


aonly if the resistance of the field circuit is less than critical value


b only if the resistance of the field circuit is greater than critical value


c irrespective of the value of the resistance in the field circuit


dnone



Goto Page No.

Page 274 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