Illumination Which lamps can be directly connected to a solar cell? Compact Fluorescent Incandescent Metal Halide LED Compact Fluorescent Incandescent Metal Halide LED 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. utilization factor. waste light factor. beam factor. absorption factor. utilization factor. waste light factor. beam factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficiency of a fluorescence lamp is 60 lumens / watt. 70 lumens / watt. 40 lumens / watt. 30 lumens / watt. 60 lumens / watt. 70 lumens / watt. 40 lumens / watt. 30 lumens / watt. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp has a negative Colour Rendering Index (CRI)? High pressure sodium vapour Fluorescent LED Low pressure sodium vapour High pressure sodium vapour Fluorescent LED Low pressure sodium vapour 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 2:1 1: 2√2 2√2 : 1 1:2 2:1 1: 2√2 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 %. 20 %. 70 %. 45 %. 30 %. 20 %. 70 %. 45 %. ANSWER DOWNLOAD EXAMIANS APP
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