D1Second 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 Second Exam Name: _____________________ Part I – Closed Book Student #: __________________ Please Read Questions Carefully – Good Luck! (16 points) 1. For the flowing statements circle the correct answer. The larger the diameter of a shaft, the smaller its endurance limit. T F According to the maximum normal stress failure theory, the material will never fail under hydrostatic stress. T F For a material subjected to pure shear stress ( σ y = - σ x ), both the maximum shear stress theory and the distortion energy theory will predict the same critical stress. T F If the fatigue factor of safety for a certain part was found to be more than one, this means that the part will fail after one million cycles of loading. T F The surface finish of a machine element affects its a) Fatigue strength b) Fatigue life c) Endurance limit d) All of the above Two columns have the same length, cross sectional area and are subjected to compressive central
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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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D1Second Exam(F07) - The Hashemite University Faculty of...

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