Electrical Engineering MCQs

Page No. 171

Which of the following are the applications of D.C. system ?


aBattery charging work


bArc welding


cElectrolytic and electro-chemical processes


d All of the above


View Answer All of the above

In a single phase rotary converter the number of slip rings will be_____________?


atwo


bthree


cfour


dsix


View Answer two

rotary converter combines the function of____________?


aan induction motor and a D.C. generator


b a synchronous motor and a D.C. generator


ca D.C. series motor and a D.C. generator


dnone of the above



With a motor converter it is possible to obtain D.C. voltage only upto__________?


a200-100 V


b600—800 V


c1000—1200 V


d 1700—2000 V


View Answer 1700—2000 V

Which of the following is reversible in action ?


aMotor generator set


bMotor converter


cRotary converter


dAny of the above


View Answer Rotary converter

A rotary converter is a single machine with______________?


a one armature and one field


btwo armatures and one field


cone armature and two fields


dnone of the above



A rotary converter in general construction and design, is more or less like___________?


a a transformer


ban induction motor


can alternator


dany D.C. machine


View Answer any D.C. machine

Which of the following metals is generally manufactured by electrolysis process ?


aLoad


bAluminium


cCopper


dZinc


View Answer Aluminium

Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required ?


aMotor-generator set


bMotor converter


cRotary converter


dMercury arc rectifier


View Answer Mercury arc rectifier

A rotary converter operates at a______________?


alow power factor


bhigh power factor


czero power factor


dnone of the above


View Answer high power factor

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