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 45 %. 70 %. 20 %. 30 %. 45 %. 70 %. 20 %. 30 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which among the following lamps has the maximum burning hours? Metal halide. Incandescent. LED. Compact Fluorescent. Metal halide. Incandescent. LED. Compact Fluorescent. ANSWER DOWNLOAD EXAMIANS APP
Illumination What will be the total flux emitted by a source of 60 candle power? 754.2 lumens. 60 lumens. None of these. 0.001326 lumens. 754.2 lumens. 60 lumens. None of these. 0.001326 lumens. ANSWER DOWNLOAD EXAMIANS APP
Illumination Total flux or lumens required in any lighting scheme depends inversely on reduction factor. reflection factor. None of these utilization factor. reduction factor. reflection factor. None of these utilization factor. 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 What is the ratio of illuminance at a point 5m just below a lamp emitting 100 candelas and at a point 5m away from the first point on the same horizontal plane? 2:1 2√2 : 1 1:2 1: 2√2 2:1 2√2 : 1 1:2 1: 2√2 ANSWER DOWNLOAD EXAMIANS APP
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