Problem 6.7: for a bronze alloy, the stress at which plastic deformation begins is 275 mpa (40,000 psi), and the modulus of elasticity is 115 gpa (16.7 ×)what is the maximum load that may be applied to a specimen with a cross-sectional area of 325 mm2(0.5 in.2) without plastic deformation? (b)if the original specimen length is 115 mm (4.5 what is the maximum length to which it may be stretched without causing plastic deformation?

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

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?