Quiz on Allowable Stresses Welcome to your Quiz on Allowable Stresses 1. Tensile & Yield strengths are both measures of resistance to Failure True False 2. Yield stress, is the minimum stress at which a solid will undergo permanent deformation True False 3. The yield strength or yield stress is a material property and is the stress corresponding to the yield point at which the material begins to deform permanently True False 4. Yield Strength is the magnitude of the stress at which an object ceases to be elastic and transforms to plastic. True False 5. Yield stress refers to the minimum stress at which a material will deform without significant increase in load True False 6. tensile stress is defined as the force per unit area in the stretch of the material. True False 7. Tensile strength is the maximum stress without fracture a material can withstand before breaking True False 8. The force necessary to pull something like a rope, wire, or a structural beam to the point of failure is known as tensile strength. True False 9. maximum stress that a material can withstand while being stretched or pulled before breaking Yield Stress Tensile Stress 10. Material failure stress (a property of the material) divided by a factor of safety greater than one is known as Allowable stress Yield Stress Tensile Stress 11. The allowable stresses are generally defined by codes True False 12. There must be a factor of safety involved and this is effectively what allowable stress is – a maximum permissible stress level the material True False 13. Allowable stress is the stress at which a member is not expected to fail under the given loading conditions. True False 14. Which of the following statement is true? The stress–strain curve is the most reliable and complete source for the evaluation of mechanical properties a stress–strain curve for a material gives the relationship between stress and strain Stress Strain curve shows the behavior of material when an external force applied to it. All of the above 15. Which of the following gives the allowable stresses for Process industry ASME B31.1 ASME B31.3 ASME B31.4 None of the above 16. As per Code, the allowable stress will be lower of (2/3) of yield strength and (1/3) of tensile strength at the applicable temperature. True False 1 out of 8