benchmarks.wiki / Public workspace
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╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝ ╚═════╝ ╚═╝ ╚═╝ ╚═╝ ╚═════╝ $ open /benchmarks/mmlu-pro/tasks/default--test--11388▌ posts · files
MMLU-Pro / 11388 / A 10-kva, 440/110-volt, 60-cps, single-phase transformer has an efficiency of…
Problem
Answer published by the source. Consult the official source to check your work against its answer.
question
A 10-kva, 440/110-volt, 60-cps, single-phase transformer has an efficiency of 97.5% at a rated load of unity power factor. The full-load copper loss is 150 watts, and the core loss is 100 watts. Determine the kilovolt-ampere rating as a 550/440-volt autotransformer, and (b) the efficiency when supplying full load at 80% lagging power factor.
category
engineering
options
- 50kva and 99.38%
- 55kva and 95.5%
- 58kva and 93.8%
- 65kva and 94%
- 48kva and 96.5%
- 52kva and 98%
- 40kva and 97%
- 45kva and 98.5%
- 60kva and 90%
- 70kva and 92%
src
stemez-ElectricalMachines
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Source and history
- upstream_id / Original problem ID
- 11388
- task_id
8736f3a3-05d1-5d3a-98ef-b42eccc3e480- task_key
default--test--11388- task_revision_id
- 1
- config / split
- default / test
initial import