Electrical Engineering MCQs

Page No. 44

When the load is above _______________ a synchronous motor is found to be more economical?


a2 kW

✖


b20 kW

✖


c 50 kW

✖


d100 kW

✓


View Answer 100 kW

Light duty cranes are used in which of the following ?


aPower houses

✖


bPumping stations

✖


cAutomobile workshops

✖


dAll of the above

✓


View Answer All of the above

Which of the following motors are pre-ferred for overhead travelling cranes ?


aSlow speed motors

✖


b Continuous duty motors

✖


cShort time rated motors

✓


dNone of the above

✖



_______________watt-hours per tonne km is usually the specific energy consumption for suburban services?


a15—20

✖


b50—75

✓


c120—150

✖


d160—200

✖


View Answer 50—75

The rate of acceleration on suburban orurban service is in the range_________________?


a 0.2 to 0.5 km phps

✖


b 1.6 to 4.0 km phps

✓


c5 to 10 km phps

✖


d15 to 25 km phps

✖


View Answer 1.6 to 4.0 km phps

Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?


aReduced current method

✖


bTap changing control of transformer

✓


cSeries parallel operation of motors

✖


dAll of the above

✖



The braking retardation is usually in the range__________________?


a0.15 to 0.30 km phps

✖


b0.30 to 0.6 km phps

✖


c 0.6 to 2.4 km phps

✖


d3 to 5 km phps

✓


View Answer 3 to 5 km phps

The coasting retardation is around_________________?


a0.16 km phps

✓


b1.6 km phps

✖


c16 km phps

✖


d40 km phps

✖


View Answer 0.16 km phps

If the co-efficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails ?


a 0.3

✖


b0.26

✖


c0.225

✖


d0.16

✓


View Answer 0.16

Which of the following happens in Kando system ?


aThree phase A.C. is converted into D.C.

✖


b Single phase A.C. is converted into D.C.

✖


cSingle phase supply is converted into three phase system

✓


dNone of the above

✖



Goto Page No.

Page 44 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