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Electrical Power Exam Guide

This document contains questions from an electrical power exam at Geetanjali Institute of Technical Studies in Dabok, Udaipur. It includes 3 questions with multiple parts about dielectric heating, illumination laws and terms, and short notes on spot welding, seam welding, welding transformers, and street lighting.

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17 views2 pages

Electrical Power Exam Guide

This document contains questions from an electrical power exam at Geetanjali Institute of Technical Studies in Dabok, Udaipur. It includes 3 questions with multiple parts about dielectric heating, illumination laws and terms, and short notes on spot welding, seam welding, welding transformers, and street lighting.

Uploaded by

hodeegits9526
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOC, PDF, TXT or read online on Scribd
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Geetanjali Institute of Technical Studies, Dabok (Udaipur) 1st Internal Exa ( I!

"r#) Utili$ation of Electrical %o&er


Time Duration : 1:30 hrs Max. Marks : 20

U'IT 1 Q1. What is dielectric heating? O tain the ex!ression "or heat !roduced in dielectric material. O# $ 3% !hase arc "urnace takes &000$ 'hen the arc (oltage is &0 ). The circuit com!rising the trans"ormer and the electrodes excluding the arc has a reactance o" 0.00*+ and resistance o" 0.002+. Determine ,i- !o'er "actor. ,ii- kW dra'n "rom su!!l/. ,iii- k)$ taken "rom su!!l/ and ,i(- 0lectrical 0""icienc/. 1 U'IT ( Q2. ,a- 2tate la's o" illumination. , - De"ine 3 ex!lain the "ollo'ing terms: 4uminous 5lux. 6llumination. 7andle 8o'er. 9tilisation 5actor. M278. De!reciation 5actor. Waste 4ight 5actor. :lare. O# 0stimate the no. and 'attages o" lam!s 'hich 'ould e re;uired to illuminate a 'orksho! s!ace <0x1& m2 / means o" a lam! mounted &m. a o(e the 'orking !lane. The a(erage illumination re;uired is a out 100 lux. utili=ation "actor > 0.*. luminous e""icienc/ 1< lumens?'att. $ssume a s!ace height ratio o" unit/ and a candle !o'er de!reciation o" 20@. 1 U'IT ) Q3. Write short notes. ,an/ three2A2A2

,i,ii,iii,i(-

2!ot 'elding and seam 'elding. Welding trans"ormer $Bax W/att 5urnace. 2treet 4ighting.

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