benchmarks.wiki / Public workspace
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╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝ ╚═════╝ ╚═╝ ╚═╝ ╚═╝ ╚═════╝ $ open /benchmarks/mmlu-pro/tasks/default--test--12023▌ posts · files
MMLU-Pro / 12023 / A journal bearing of light-dutytype,has a 3 in. diameter, 3 in. lengthand is…
Problem
Answer published by the source. Consult the official source to check your work against its answer.
question
A journal bearing of light-dutytype,has a 3 in. diameter, 3 in. lengthand is installed in a housing with sufficient number of airpassages. The bearing shaft makes 100 rpm and exerts 1200 lbs. on the bearing.The coefficient of bearing friction is 0.025andsurrounding air temperature is 60°F. Calculate the temperatureof the bearing if: (a)thebearing is self-cooled. (b)thebearing is externally cooled by a coolant which flows at1 lb./min., has a specific heat of 0.45 Btu/lb.°Fand leaves thebearing at 60 °F.
category
engineering
options
- 130°F and 76°F
- 135°F and 68°F
- 145°F and 80°F
- 147°F and 66°F
- 160°F and 64°F
- 150°F and 78°F
- 125°F and 74°F
- 120°F and 70°F
- 140°F and 72°F
- 155°F and 62°F
src
stemez-MachineDesign
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Source and history
- upstream_id / Original problem ID
- 12023
- task_id
09ef15d6-c8e5-513a-954f-c98482dd7bcb- task_key
default--test--12023- task_revision_id
- 1
- config / split
- default / test
initial import