1. Defi ne what is meant by a factor of safety . 2. How might a brittle type of fracture occur in what is normally a ductile material? 3. How does the rate of material creep vary with stress and...

1. Defi ne what is meant by a factor of safety .

2. How might a brittle type of fracture occur in what is normally a ductile material?

3. How does the rate of material creep vary with stress and working temperature?