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DRAFTSMAN-GR-II-SECOND-GRADE-OVERSEER--ELECTRICAL---PWDIRRIGATION Related Question Answers
6. Which of the following is used in ceiling fan?
Universal motor Synchronous motor Series motor Induction motor
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7. Illumination of a surface is inversely proportional to:
Luminous intensity Distance from the source Square of the distance from the source Total Lumen
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8. Active power in 3 phase circuit is :
-»/3 VLILcosfφ 3 VL IL cosφ 3 VphIphcosφ 3 vph Iph sinφ
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12. Generator efficiency is maximum when :
Variable loss is minimum Constant loss = Variable loss Constant loss is minimum Constant loss is half of the variable loss
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13. Form factor =
rms value/avg value avg. value/rms value rms value/peak value peak value/rms valuepeak value/rms value
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19. Two wattmeter method of power measurement is suitable for :
balanced load only unbalanced loadunbalanced load both balanced and unbalanced load delta connected loaddelta connected load
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20. Ward-Leonard system is used for :
Voltage regulation of transformer Speed control of dc motorSpeed control of dc motor Excitation of alternator Voltage regulation of alternator
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22. Relative permeability of material =
Flux density produced in vacuum Flux density produced in vacuum Flux density produced in material Flux density produced in material Flux density produced in material Flux density produced in vacuum
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23. The tube of fluorescent lamp is filled with
Mercury and Nitrogen Mercury and Argon Nitrogen and Argon Oxygen and Argon
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