Ratio of ultimate strength to working stress?

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Prepare for the NEIEP Escalators and Moving Walks Test with our quiz. Featuring flashcards and multiple choice questions, each question provides helpful hints and explanations. Ace your exam with confidence!

Multiple Choice

Ratio of ultimate strength to working stress?

Explanation:
The safety factor. The ratio of ultimate strength to working stress measures how much stronger a component is than the stress it normally experiences. Ultimate strength is the maximum stress a material can withstand before failure, while working (allowable) stress is the stress expected during normal operation. Dividing the two gives the margin of safety: a higher factor means more reserve strength to cover uncertainties, overloads, and wear. In escalator and moving-walk design, this factor helps ensure reliability and safety under real-world conditions. The other terms aren’t about this design margin—they’re unrelated concepts or tools.

The safety factor. The ratio of ultimate strength to working stress measures how much stronger a component is than the stress it normally experiences. Ultimate strength is the maximum stress a material can withstand before failure, while working (allowable) stress is the stress expected during normal operation. Dividing the two gives the margin of safety: a higher factor means more reserve strength to cover uncertainties, overloads, and wear. In escalator and moving-walk design, this factor helps ensure reliability and safety under real-world conditions. The other terms aren’t about this design margin—they’re unrelated concepts or tools.

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