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 5 6 2 4 5 6 2 ANSWER DOWNLOAD EXAMIANS APP
Illumination Total flux or lumens required in any lighting scheme depends inversely on utilization factor. reflection factor. None of these reduction factor. utilization factor. reflection factor. None of these reduction factor. ANSWER DOWNLOAD EXAMIANS APP
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 30 %. 45 %. 20 %. 70 %. 30 %. 45 %. 20 %. 70 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination Wave length for red colour is around 400 nm. 500 nm. 600 nm. 700 nm. 400 nm. 500 nm. 600 nm. 700 nm. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Illuminance Luminous flux Luminance Luminous Intensity Illuminance Luminous flux Luminance Luminous Intensity ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp is best suited for lighting an International sports arena? Compact Fluorescent LED Incandescent Metal Halide Compact Fluorescent LED Incandescent Metal Halide ANSWER DOWNLOAD EXAMIANS APP