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MMLU-Pro / 12117 / A cylindrical container 3 ft. in diameter and 5 ft. high has oil. A transformer…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A cylindrical container 3 ft. in diameter and 5 ft. high has oil. A transformer is immersed in the oil. Determine the surface temperatureof the container if the loss of energy is 2.0 kW. Assume the bottom of the container to be insulated and that theloss is only by natural convection to the ambient air at 80°F. TABLE Geometry Range of application C n L Vertical planes and cylinders 10^4 < N(Gr)LNPr< 10^9 N 10^9 < N(Gr)LNPr< 10^12 N 0.29 0.19 1/4 1/3 height 1 Horizontal cylinders 10^3 < N(Gr)LNPr< 10^9 N 10^9 < N(Gr)LNPr< 10^12 N 10^5 < N(Gr)LNPr< 2×10^7 N 0.27 0.18 0.27 1/4 1/3 1/4 diameter 1 length of side Horizontal plates - heated plates facing up or cooled plates facing down Cooled plates facing up or heated plates facing down 2×10^7 < N(Gr)LNPr< 3×10^10 N 3×10^5 < N(Gr)LNPr< 3×10^10 N 0.22 0.12 1/3 1/4 1 length of side

category

engineering

options

  1. 280°F
  2. 310°F
  3. 300°F
  4. 265°F
  5. 275°F
  6. 285°F
  7. 260°F
  8. 273°F
  9. 290°F
  10. 250°F

src

stemez-TransportPhenomena

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