Electrical Engineering MCQs

Page No. 93

The laminations of the armature of a D.C. machine are usually ___________ thick?


a0.1 to 0.2 mm


b0.2 to 0.3 mm


c0.3 to 0.4 mm


d0.4 to 0.5 mm


View Answer 0.4 to 0.5 mm

D.C. servomotors are used in______________?


apurely D.C. control systems


bpurely AC. control systems


c both D.C. and AC. control systems


dnone of the above



The cylindrical windings using circular conductors are used for current rating of____________?


aupto 20 A


b upto 40 A


cupto 60 A


dupto 80 A


View Answer upto 80 A

Which of the following in an application of D.C. motors?


aTraction


bDrives for process industry


cBattery driven vehicles


dAll of the above


View Answer All of the above

The stator of a D.C. machine comprises of_____________?


amain poles


binterpoles


c frame


d all of the above


View Answer all of the above

is usually used for brush rockers____________?


aMild steel


bCopper


cAluminium


dCast-iron


View Answer Cast-iron

Which of the following brushes can be used for high values of current density ?


aMetal graphite brushes


bHard carbon brushes


cElectro-graphitic brushes


dNatural graphite brushes



Which of the following problem arises in D.C. motors which are fed from thyristor bridge circuits ?


a Increased I R losses


bIncreased core losses


cPoor commutation


dAll of the above


View Answer All of the above

In a D.C. machine the number of brush arms is _________ the number of poles?


a less than


bequal to


cgreater than


d none of the above


View Answer equal to

D.C. machines designed with a large value of air gap length have_____________?


aworst, ventilation


bpoor ventilation


cbetter ventilation


dnone of the above


View Answer better ventilation

Goto Page No.

Page 93 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