Certified Playground Safety Inspector (CPSI) Practice Exam

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What is the size of the crush/shear test probe for merry-go-rounds?

3/16" (.19)
1/4" (.25)
5/16" (.30)
3/8" (.37)

The correct answer is: 5/16" (.30)

A) 3/16" (.19) is incorrect because it is too small of a size and may not provide accurate results when testing the crush/shear strength of a merry-go-round. B) 1/4" (.25) is incorrect because although it is a common size for crush/shear test probes, it may not be sufficient for testing the strength of a merry-go-round which can withstand higher forces. D) 3/8" (.37) is incorrect because it is too large of a size and may not fit properly in the testing equipment or provide accurate results when testing the crush/shear strength of a merry-go-round. Overall, C) 5/16" (.30) is the most appropriate and commonly used size for testing the crush/shear strength of a merry-go-round.