Illumination Which among the following lamps has the maximum burning hours? Compact Fluorescent. Metal halide. Incandescent. LED. Compact Fluorescent. Metal halide. Incandescent. LED. ANSWER DOWNLOAD EXAMIANS APP
Illumination What is the work of a driver in case of an LED? None of these To convert DC to AC To convert AC to DC Both ‘a’ and ‘b’ None of these To convert DC to AC To convert AC to DC Both ‘a’ and ‘b’ ANSWER DOWNLOAD EXAMIANS APP
Illumination The work of ballast in a fluorescent tube is to None of these. limit the flow of current. both ‘a’ and ‘b’. provide a kick start when voltage is induced. None of these. limit the flow of current. both ‘a’ and ‘b’. provide a kick start when voltage is induced. ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficacy of a typical HPSV lamp is in between 10 - 40 lm/watt 120 - 200 lm/watt. 70 - 120 lm/watt. 40 - 70 lm/watt. 10 - 40 lm/watt 120 - 200 lm/watt. 70 - 120 lm/watt. 40 - 70 lm/watt. ANSWER DOWNLOAD EXAMIANS APP
Illumination In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to beam factor. absorption factor. utilization factor. waste light factor. beam factor. absorption factor. utilization factor. waste light factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination Total flux or lumens required in any lighting scheme depends inversely on utilization factor. None of these reduction factor. reflection factor. utilization factor. None of these reduction factor. reflection factor. ANSWER DOWNLOAD EXAMIANS APP
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