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 2 6 5 4 2 6 5 ANSWER DOWNLOAD EXAMIANS APP
Illumination In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to absorption factor. beam factor. utilization factor. waste light factor. absorption factor. beam factor. utilization factor. waste light factor. 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 3 / 2. 1 / 3. 2 / 5. 2 / 3. 3 / 2. 1 / 3. 2 / 5. 2 / 3. 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√2 : 1 1:2 1: 2√2 2:1 2√2 : 1 1:2 1: 2√2 2:1 ANSWER DOWNLOAD EXAMIANS APP
Illumination The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is 140. 30 200. 150. 140. 30 200. 150. ANSWER DOWNLOAD EXAMIANS APP
Illumination The range of visual spectrum is 300nm - 760nm. 300nm - 1000nm. 480nm - 760nm. 480nm - 1000nm. 300nm - 760nm. 300nm - 1000nm. 480nm - 760nm. 480nm - 1000nm. ANSWER DOWNLOAD EXAMIANS APP
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