benchmarks.wiki / Public workspace
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╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝ ╚═════╝ ╚═╝ ╚═╝ ╚═╝ ╚═════╝ $ open /benchmarks/mmlu-pro/tasks/default--test--12072▌ posts · files
MMLU-Pro / 12072 / A 120 V dc shunt motor having an armature circuit resistance of 0.2 ohm and a…
Problem
Answer published by the source. Consult the official source to check your work against its answer.
question
A 120 V dc shunt motor having an armature circuit resistance of 0.2 ohm and a field circuit resistance of 60 ohms, draws a line current of 40 A at full load. The brush volt drop is 3 V and rated, full load speed is 1800 rpm. Calculate: (a) The speed at half load. (b) The speed at an overload of 125 percent.
category
engineering
options
- Half-load speed: 1870 rpm, 1(1/4) load speed: 1790 rpm
- Half-load speed: 1780 rpm, 1(1/4) load speed: 1850 rpm
- Half-load speed: 1900 rpm, 1(1/4) load speed: 1850 rpm
- Half-load speed: 1800 rpm, 1(1/4) load speed: 1780 rpm
- Half-load speed: 1750 rpm, 1(1/4) load speed: 1825 rpm
- Half-load speed: 1830 rpm, 1(1/4) load speed: 1775 rpm
- Half-load speed: 1860 rpm, 1(1/4) load speed: 1765 rpm
- Half-load speed: 1820 rpm, 1(1/4) load speed: 1740 rpm
- Half-load speed: 1800 rpm, 1(1/4) load speed: 1700 rpm
- Half-load speed: 1840 rpm, 1(1/4) load speed: 1800 rpm
src
stemez-ElectricalMachines
Discussion
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Source and history
- upstream_id / Original problem ID
- 12072
- task_id
4a984e43-50b1-5292-8832-ef3314f4c71a- task_key
default--test--12072- task_revision_id
- 1
- config / split
- default / test
initial import