Apressurized cylinder of inner diameter 20" and outer diameter 30" is made of mild carbon steel (e = 30,000 ksi, v = 0.3) with a 36 ksi tension yield streaa. determine the pressure to cause yield by the tresca criteria for plane stress conditions.
determine the pressure to cause yield for a closed end cylinder using the von mises criteria.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

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

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature