Electrical Engineering MCQs

Page No. 158

Insulation resistance of high voltage circuit breakers is more than________________?


a1 mega ohms

✖


b10 mega ohms

✖


c 100 mega ohms

✓


d500 mega ohms

✖


View Answer 100 mega ohms

The delay fuses are used for the protection of ___________?


a motors

✓


bpower outlet circuits

✖


c fluorescent lamps

✖


dlight circuits

✖


View Answer motors

The time of closing the cycle, in modern circuit breakers is_____________?


a0.003 sec

✓


b 0.001 sec

✖


c0.01 sec

✖


d0.10 sec

✖


View Answer 0.003 sec

For the protection of power station buildings against direct strokes the requirements are___________?


a interception

✖


b interception and conduction

✖


cinterception, conduction and dissipation

✓


d interception, conduction, dissipation and reflection

✖



Wave trap is used to trap waves of__________________?


apower frequencies

✖


b higher frequencies entering generator or transformer units

✓


ceither of the above

✖


dnone of the above

✖



Resistance grounding is used for voltage between_________________?


a33kVto66kV

✖


bHkVto33kV

✖


c3.3kVandllkV

✓


d none of the above

✖


View Answer 3.3kVandllkV

The ground wire should not be smaller than No _________ copper


a2

✖


b 4

✖


c6

✖


d10

✓


View Answer 10

Interruption of large currents by relay requires______________?


aarc suppressing blow out coils

✖


b wide separation of the opened contacts

✖


chigh speed opening of contacts

✖


dall of the above

✓


View Answer all of the above

The arc voltage produced in A.C. circuit breaker is always_____________?


ain phase with the arc current

✓


blagging the arc current by 90″

✖


c leading the arc current by 90°

✖


dnone of the above

✖



Overheating of relay contacts or contact born out is due to_______________?


aslow making and breaking of load circuit contacts

✖


b foreign matter on the contact surface

✖


ctoo low contact pressure

✖


dall of the above

✓


View Answer all of the above

Goto Page No.

Page 158 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