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5. Lighting in restaurants and malls is an example of……………[SSC JE EE 2021]
4. Which of the following lamps use the phenomenon of fluorescence?
3. In which of the following lighting systems, more than 90% of the total light flux is made to fall directly on the working plane with the help of deep reflectors? [SSC JE EE 2021]
1. In which of the following lighting schemes is 90% to 100% of total light flux thrown upward to the ceiling for diffused reflection? [SSC JE EE 2021]
4. The standard illumination level for a workshop area where detailed or fine work is done is in the range of: [SSC JE EE 2022]
3. Angle reflectors are used to provide illumination in a vertical plane, where reflectors used are of the[SSC JE EE 2022]
2. A 230 V lamp has a total flux of 1000 lumens and takes a current of 0.5 A. The MSCP per watt of the lamp is: [SSC JE EE 2022]
1. The quantity that describes the light giving radiant power of a luminaire in any particular direction is called[SSC JE EE 2022]
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5. The phenomenon of fluorescence in a fluorescent lamp mainly occurs due to the presence of: [SSC JE EE 2022]
4. Which of the following best describes a LASER light? [SSC JE EE 2022]
3. Which of the following methods of lighting calculation can be used for rough calculations and checking purposes?[SSC JE EE 2022]
2. The red light emitted by a ruby laser is of wavelength[SSC JE EE 2022]
