Illumination Luminous efficiency of a fluorescence lamp is 40 lumens / watt. 30 lumens / watt. 60 lumens / watt. 70 lumens / watt. 40 lumens / watt. 30 lumens / watt. 60 lumens / watt. 70 lumens / watt. 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 The illumination of the surface varies directly with cosine of the angle between normal to surface and direction of the inclined light is given by Lambert’s cosine law. law of square inverse. both A and B. None of these Lambert’s cosine law. law of square inverse. both A and B. None of these 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 / 5. 2 / 3. 1 / 3. 3 / 2. 2 / 5. 2 / 3. 1 / 3. 3 / 2. 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. Absorption factor. Depreciation. Maintenance. Utilization. Absorption factor. Depreciation. Maintenance. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela is the unit of which? Wavelength. Luminous flux. Luminous intensity. Frequency. Wavelength. Luminous flux. Luminous intensity. Frequency. ANSWER DOWNLOAD EXAMIANS APP
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