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MMLU-Pro / 11792 / A flat key mounted on a motor shaft 4 in. diameter is subjected to a maximum…

Problem

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

question

A flat key mounted on a motor shaft 4 in. diameter is subjected to a maximum twisting moment of 45,000 lbs-in. Design a suitable key assuming the design stress in bearing to be 24,000 psi and in shear at 9000 psi.

category

engineering

options

  1. thickness = 7/8 in. width = 1.5 in. length = 3 in.
  2. thickness = 1 in. width = 2 in. length = 1.5 in.
  3. thickness = 3/4 in. width = 1 in. length = 2.5 in.
  4. thickness = 7/8 in. width = 1.25 in. length = 2.5 in.
  5. thickness = 1 in. width = 1.5 in. length = 2 in.
  6. thickness = 1/2 in. width = 0.75 in. length = 3 in.
  7. thickness = 5/8 in. width = 1.25 in. length = 2 in.
  8. thickness = 1/2 in. width = 1.25 in. length = 1.5 in.
  9. thickness = 1/2 in. width = 1 in. length = 2.5 in.
  10. thickness = 3/4 in. width = 1.5 in. length = 3.5 in.

src

stemez-MachineDesign

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Source and history

upstream_id / Original problem ID
11792
task_id
b5167f2d-92d7-5b36-86dc-8b55c24e4804
task_key
default--test--11792
task_revision_id
1
config / split
default / test

Official source

initial import