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A small assembly shop 16m long, 10m wide, and 3m up to trusses is to be illuminated to a level of 200 lux. The utilization and maintenance factor are 0.74 and 0.8 respectively. Calculate the number of Lamp required to illuminate the whole area if the lumen output the lamp selected is 3000 lumens.
  • a)
    10
  • b)
    15
  • c)
    18
  • d)
    22
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A small assembly shop16mlong,10mwide, and3mup to trusses is to be illu...
Given,
Working Area (A) = 16m×10m = 160m2
Required illumination (E) = 200 lux.
Lumens output of one lamp (O)=3000 lumens
Utilization factor  (UF) = 0.74
Maintenance factor (MF) = 0.8
So, number of Lamp required (N):

N = 18
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Most Upvoted Answer
A small assembly shop16mlong,10mwide, and3mup to trusses is to be illu...


Calculation of Required Number of Lamps:

- Area of the assembly shop:
- Length = 16m, Width = 10m
- Area = Length x Width = 16m x 10m = 160m²

- Required Illuminance:
- Illuminance = 200 lux

- Utilization Factor:
- UF = 0.74

- Maintenance Factor:
- MF = 0.8

- Total Light Loss Factor:
- LLF = UF x MF
- LLF = 0.74 x 0.8 = 0.592

- Required Luminous Flux:
- Luminous flux = Illuminance x Area / LLF
- Luminous flux = 200 lux x 160m² / 0.592
- Luminous flux = 54054.05 lumens

- Number of Lamps Required:
- Lumen output per lamp = 3000 lumens
- Number of lamps = Required Luminous Flux / Lumen output per lamp
- Number of lamps = 54054.05 lumens / 3000 lumens
- Number of lamps = 18 lamps

Therefore, the correct answer is option C, 18 lamps are required to illuminate the whole area of the assembly shop.
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A small assembly shop16mlong,10mwide, and3mup to trusses is to be illuminated to a level of200lux. The utilization and maintenance factor are0.74and0.8respectively. Calculate the number of Lamp required to illuminate the whole area if the lumen output the lamp selected is3000lumens.a)10b)15c)18d)22Correct answer is option 'C'. Can you explain this answer?
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A small assembly shop16mlong,10mwide, and3mup to trusses is to be illuminated to a level of200lux. The utilization and maintenance factor are0.74and0.8respectively. Calculate the number of Lamp required to illuminate the whole area if the lumen output the lamp selected is3000lumens.a)10b)15c)18d)22Correct answer is option 'C'. Can you explain this answer? for RRB NTPC/ASM/CA/TA 2025 is part of RRB NTPC/ASM/CA/TA preparation. The Question and answers have been prepared according to the RRB NTPC/ASM/CA/TA exam syllabus. Information about A small assembly shop16mlong,10mwide, and3mup to trusses is to be illuminated to a level of200lux. The utilization and maintenance factor are0.74and0.8respectively. Calculate the number of Lamp required to illuminate the whole area if the lumen output the lamp selected is3000lumens.a)10b)15c)18d)22Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for RRB NTPC/ASM/CA/TA 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A small assembly shop16mlong,10mwide, and3mup to trusses is to be illuminated to a level of200lux. The utilization and maintenance factor are0.74and0.8respectively. Calculate the number of Lamp required to illuminate the whole area if the lumen output the lamp selected is3000lumens.a)10b)15c)18d)22Correct answer is option 'C'. Can you explain this answer?.
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