benchmarks.wiki / Public workspace
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╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝ ╚═════╝ ╚═╝ ╚═╝ ╚═╝ ╚═════╝ $ open /benchmarks/mmlu-pro/tasks/default--test--11621▌ posts · files
MMLU-Pro / 11621 / Oil flows through a tube, and heat is transferred to it by forced convection.…
Problem
Answer published by the source. Consult the official source to check your work against its answer.
question
Oil flows through a tube, and heat is transferred to it by forced convection. The tube is 15 ft. long, and its internal diameter measures 0.0303 ft. The flow is measured at 80 lbm/hr, and the wall surface temperature is constant at 350°F. Properties of the oil are: C_p = 0.5 Btu/lbm-°Fk = 0.083 Btu/hr-ft-°F The viscosity-temperature profile is given by the following data: T(°F) (lbm/ft-hr) 150 15.73 200 12.22 250 9.2 300 6.82 350 4.72 Calculate the heat transfer coefficient and the mean exit temperature of the oil, assuming that is enters the tube at a temperature of 150°F.
category
engineering
options
- Heat transfer coefficient is 21 Btu/hr-ft^2-°F, average outlet temperature is 260°F
- Heat transfer coefficient is 20.05 Btu/hr-ft^2-°F, average outlet temperature is 252.5°F
- Heat transfer coefficient is 18 Btu/hr-ft^2-°F, average outlet temperature is 260°F
- Heat transfer coefficient is 22 Btu/hr-ft^2-°F, average outlet temperature is 245°F
src
stemez-HeatTransfer
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Source and history
- upstream_id / Original problem ID
- 11621
- task_id
1b9584e7-7f64-5299-9446-9e3b9372b9d7- task_key
default--test--11621- task_revision_id
- 1
- config / split
- default / test
initial import