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colliery workshop 20mx10m requires an average illumination of 135 lm/m 2 on the working plane. Allow a coefficient of utilization of 0.45 and a depreciation factor of 1.4. The supply is 230-V at 50Hz and the efficiency of each of the lamps is 12 lm/W. 16. Calculate the electrical power required for the purpose. A. 8 kW B. 4 kW C. 3 kW D. 7 kW 17. Calculate the current required for the purpose. A. 34.3 A B. 21.2 A C. 26.9 A D. 30.4

colliery workshop 20mx10m requires an average illumination of 135 lm/m 2 on the working plane. Allow a coefficient of utilization of 0.45 and a depreciation factor of 1.4. The supply is 230-V at 50Hz and the efficiency of each of the lamps is 12 lm/W. 16. Calculate the electrical power required for the purpose. A. 8 kW B. 4 kW C. 3 kW D. 7 kW 17. Calculate the current required for the purpose. A. 34.3 A B. 21.2 A C. 26.9 A D. 30.4

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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A colliery workshop 20mx10m requires an average
illumination of 135 lm/m 2 on the working plane. Allow a
coefficient of utilization of 0.45 and a depreciation factor of
1.4. The supply is 230-V at 50Hz and the efficiency of each of
the lamps is 12 lm/W.
16. Calculate the electrical power required for the
purpose.
A. 8 kW B. 4 kW C. 3 kW D. 7 kW
17. Calculate the current required for the purpose.
A. 34.3 A B. 21.2 A C. 26.9 A D. 30.4 A

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