1. If the ultimate tensile stress at which failure occurs in a material is 550MPa and a factor of safety of 4 is to apply, what will be the allowable working stress? 2. How do you defi ne the linear...

1. If the ultimate tensile stress at which failure occurs in a material is 550MPa and a factor of safety of 4 is to apply, what will be the allowable working stress?

2. How do you defi ne the linear expansivity of a material?