Illumination What is the work of a driver in case of an LED? Both ‘a’ and ‘b’ To convert DC to AC None of these To convert AC to DC Both ‘a’ and ‘b’ To convert DC to AC None of these To convert AC to DC ANSWER DOWNLOAD EXAMIANS APP
Illumination Total flux or lumens required in any lighting scheme depends inversely on utilization factor. reduction factor. reflection factor. None of these utilization factor. reduction factor. reflection factor. None of these ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp is best suited for lighting an International sports arena? LED Metal Halide Incandescent Compact Fluorescent LED Metal Halide Incandescent Compact Fluorescent ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficiency of a fluorescence lamp is 40 lumens / watt. 60 lumens / watt. 70 lumens / watt. 30 lumens / watt. 40 lumens / watt. 60 lumens / watt. 70 lumens / watt. 30 lumens / watt. ANSWER DOWNLOAD EXAMIANS APP
Illumination What will be the number of lamps, each having 300 lumens, required to obtain an average illuminance of 50 lux on a 4m × 3m rectangular room? 4 6 5 2 4 6 5 2 ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp has the best Colour Rendering Index (CRI)? Fluorescent High pressure sodium vapour Incandescent LED Fluorescent High pressure sodium vapour Incandescent LED ANSWER DOWNLOAD EXAMIANS APP
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