Electrical Engineering MCQs

Page No. 254

A repulsion motor is equipped with__________?


aslip rings

✖


bcommutator

✓


c both A. and (b)

✖


dnone of the above

✖


View Answer commutator

Which of the following motors has two separate windings on the motor ?


a Repulsion motor

✖


bRepulsion induction motor

✓


cRepulsion start induction run motor

✖


dNone of the above

✖



Which of the following statements regarding a reluctance motor is incorrect ?


aIt cannot be reversed, ordinarily

✓


b It requires no D.C. field excitation for its operation

✖


cIt is nothing else but a single-phase, salient pole synchronous-induction motor

✖


dIts squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluctance path between stator and rotor

✖



A shaded pole motor does not possess___________?


acentrifugal switch

✖


b capacitor

✖


ccommutator

✖


dall of the above

✓


View Answer all of the above

To reverse the direction of rotation of acapacitor start motor while it is running we should___________?


adisconnect motor from the supply till it stops then reconnect it to supply with reversed connection of main or auxiliary winding

✓


b disconnect motor from supply and immediately reconnect it to supply with reversed connections of the main winding

✖


creverse the direction of connection of the auxiliary winding and after motor comes to rest then connect auxiliary winding to the supply

✖


dreverse the direction of connections of the auxiliary winding and immediately connect it to supply

✖



In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will_____________?


abecome unstable

✖


b draw excessive armature current and may burn out

✖


cfall out of synchronism and come to stand still

✖


drun as induction motor

✓



Most of the fractional horsepower motors have either___________?


ahard and annealed bearings

✖


b ball or roller bearings

✖


c soft and porous bearings

✖


d plain or sleeve bearings

✓



In a universal motor, the most common cause of brush sparking is___________?


a open armature winding

✖


bshorted armature winding

✖


cshorted field winding”

✖


dall of the above

✓


View Answer all of the above

Which of the following statements regarding reluctance-start motor is incorrect ?


aIt is similar to reluctance motor

✓


bIt is basically an induction motor and not a synchronous one

✖


cSo far as its basic working principle is concerned, it is similar to shaded pole motor

✖


d the air-gap between rotor and salient poles is non- uniform

✖



If starting winding of a single-phase induction motor is left in the circuit, it will____________?


arun faster

✖


bspark at light loads

✖


cdraw excessive current and overheat

✓


d run slower

✖



Goto Page No.

Page 254 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