When would working with machinery be a common type of caught-in and caught-between hazard? A: When working with heavy pieces. B: When working with unguarded moving parts. C: When working at night. D: When there is no PPE available for this hazard.

Consider airflow over a flat plate of length l = 1.5 m under conditions for which transition occurs at le = 0.9 m based on the critical reynolds number, re, e = 5 x 10. evaluating the thermophysical properties of air at 400 k, determine the air velocity. (hint: use the tables to find the properties of air)

Precipitation hardening can be achieved in many light alloys by a three-step heat treatment. what is carried out and what is the purpose at each step? why is such a treatment necessary based on the nucleation and growth theory of phase transformation. compare this treatment with tempering martensite for carbon steels (similarities and differences).

The elements influencing a materials service performance include which of the following (mark all that apply) a)- stress b)- corrosion c)- temperature d)- vibration e)- operating cycles