3. Luminaires of 2000 Im output will be installed in a room. The desired illumination is 200 fc. The coefficient of utilization is 0.45 and the maintenance factor is 0.9. Find the number of luminaires needed if the size of the room is 120 sq. ft. 4. The illumination of a room 40 ft by 60 ft is being designed. The desired light intensity is 80 fc. The maintenance factor and the coefficient of utilization are 0.7 and 0.6 respectively. Each luminaire to be installed produces 3300 Im. If there are four rows of luminaires, how many luminaires are there per row?
Power Amplifier
The power amplifier is an electronic amplifier designed to maximize the signal strength of a given input. The input signal strength is enhanced to a high enough level to drive output devices such as speakers, headphones, RF (Radio frequency) transmitters, etc. Unlike voltage / current amplifiers, the power amplifier is designed to drive core loads directly and is used as a storage block in the amplifier series.
Maximum Efficiency Criterion
In every field of engineering, there is a tremendous use of the machine and all those machines are equipped for their popular work efficiency so it very much important for operation engineers to monitor the efficiency of the machine, planning engineers to check out the efficiency of the machine before installing the machine and design engineers to design machine for higher efficiency than and then the utility will procure their products that will ultimately lead to profit and loss of the company. It indicates the importance of efficiency right from the initial stage as manufacturing units, intermediate stage as planning coordinators, and end-users stage as a utility.
![3. Luminaires of 2000 Im output will be installed in a room. The desired illumination is 200
fc. The coefficient of utilization is 0.45 and the maintenance factor is 0.9. Find the
number of luminaires needed if the size of the room is 120 sq. ft.
4. The illumination of a room 40 ft by 60 ft is being designed. The desired light intensity is
80 fc. The maintenance factor and the coefficient of utilization are 0.7 and 0.6
respectively. Each luminaire to be installed produces 3300 Im. If there are four rows of
luminaires, how many luminaires are there per row?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbb0f9ddf-5c07-4a01-a697-b32a7e6423c8%2Ff3d610f0-5dc3-4db8-9797-98fc4c067686%2F3zddqls_processed.jpeg&w=3840&q=75)
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