Illumination A 1000 W bulb fitted with a reflector illuminates an area of 3 m x 3 m with an average illumination of 450 lux. If the bulb has and efficiency of 9 lumens / watt the efficiency of the reflector is 70 %. 20 %. 45 %. 30 %. 70 %. 20 %. 45 %. 30 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination Total flux or lumens required in any lighting scheme depends inversely on reflection factor. utilization factor. None of these reduction factor. reflection factor. utilization factor. None of these reduction factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination The range of visual spectrum is 300nm - 1000nm. 300nm - 760nm. 480nm - 1000nm. 480nm - 760nm. 300nm - 1000nm. 300nm - 760nm. 480nm - 1000nm. 480nm - 760nm. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Luminous Intensity Luminous flux Luminance Illuminance Luminous Intensity Luminous flux Luminance Illuminance ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp is best suited for lighting an International sports arena? Metal Halide LED Compact Fluorescent Incandescent Metal Halide LED Compact Fluorescent Incandescent ANSWER DOWNLOAD EXAMIANS APP
Illumination What is the work of a driver in case of an LED? To convert DC to AC None of these Both ‘a’ and ‘b’ To convert AC to DC To convert DC to AC None of these Both ‘a’ and ‘b’ To convert AC to DC ANSWER DOWNLOAD EXAMIANS APP
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