D1First Exam(F07) - The Hashemite University Faculty of...

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The Hashemite University Faculty of Engineering Mechanical Engineering Department Machine Design I Fall 2007 Instructor: Dr. Ala Hijazi First Exam Name: _____________________ Part I – Closed Book Student #: __________________ Please Read Questions Carefully – Good Luck! (19 points) 1. For the flowing statements circle the correct answer. Cold working decreases the yield strength of the material. T F For a rotating ring, the maximum stress occurs at the inner surface. T F In a thick-walled pressure vessel the stress increases as we move away from the inner surface. T F The factor of safety can be either equal or larger than the design factor. T F Stress concentration factors should be used for brittle materials but not for ductile materials. T F Ductile materials undergo large amounts of plastic deformation before fracture. T F During tempering, a part will be cooled at a very fast rate using water or oil. T F Annealing is usually used on cold worked parts in order to remove residual stresses and decrease the yield strength. T F Ceramics are ductile and much stronger in compression than in
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This note was uploaded on 10/25/2010 for the course MECHINCAL 2010 taught by Professor علاءحجازي during the Spring '10 term at Hashemite University.

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D1First Exam(F07) - The Hashemite University Faculty of...

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