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? 2 4 5 6 2 4 5 6 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 70 %. 20 %. 45 %. 30 %. 70 %. 20 %. 45 %. 30 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Luminous Intensity Illuminance Luminance Luminous flux Luminous Intensity Illuminance Luminance Luminous flux ANSWER DOWNLOAD EXAMIANS APP
Illumination The solid angle subtended by an area of 2400 cm2 on the surface of a sphere of diameter 1.2 m is 1 / 3. 3 / 2. 2 / 3. 2 / 5. 1 / 3. 3 / 2. 2 / 3. 2 / 5. ANSWER DOWNLOAD EXAMIANS APP
Illumination In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to utilization factor. waste light factor. beam factor. absorption factor. utilization factor. waste light factor. beam factor. absorption factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination ___________________________ factor is defined as the ratio of the illumination when everything is clean to illumination under normal working conditions. Depreciation. Utilization. Maintenance. Absorption factor. Depreciation. Utilization. Maintenance. Absorption factor. ANSWER DOWNLOAD EXAMIANS APP
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