Illumination Candela/metre square is the unit of which photometric quantity? Luminous Intensity Luminance Luminous flux Illuminance Luminous Intensity Luminance Luminous flux Illuminance ANSWER DOWNLOAD EXAMIANS APP
Illumination ___________________________ factor is defined as the ratio of the illumination when everything is clean to illumination under normal working conditions. Utilization. Maintenance. Depreciation. Absorption factor. Utilization. Maintenance. Depreciation. Absorption 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 70 %. 45 %. 30 %. 20 %. 70 %. 45 %. 30 %. 20 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination A 200 candle power lamp is hung 4 m above the centre of circular area of 5 m diameter. The illumination at centre of the area is 12.5 lux. 18.5 lux. 13.5 lux. 17.5 lux. 12.5 lux. 18.5 lux. 13.5 lux. 17.5 lux. ANSWER DOWNLOAD EXAMIANS APP
Illumination The work of ballast in a fluorescent tube is to both ‘a’ and ‘b’. None of these. limit the flow of current. provide a kick start when voltage is induced. both ‘a’ and ‘b’. None of these. limit the flow of current. provide a kick start when voltage is induced. 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 2 / 3. 3 / 2. 1 / 3. 2 / 5. 2 / 3. 3 / 2. 1 / 3. 2 / 5. ANSWER DOWNLOAD EXAMIANS APP
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