Which of the following is NOT a factor in the amperage setting on a welding machine?

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

The higher the astm grain size number, the finer the gran is. a)-true b)-false