An air-standard cycle with constant specific heats at room temperature is executed in a closed system and is composed of the following four processes:
1–2 v = constant heat addition from 14.7 psia and 80°f in the amount of 300 btu/lbm
2–3 p = constant heat addition to 3150 r
3–4 isentropic expansion to 14.7 psia
4–1 p = constant heat rejection to initial state
the properties of air at room temperature are cp = 0.240 btu/lbm·r, cv = 0.171 btu/lbm·r, and k = 1.4.
a. show the cycle on p-v and t-s diagrams. ( upload your response/solution using the controls provided below.) (you must provide an answer before moving on to the next part.)
b. calculate the total heat input per unit mass
c. determine the thermal efficiency

What are the two (02) benefits, which may result from a successful implementation of preventive maintenance (pm) program in an organization? (clo3)a)- lean manufacturing b)-overlapping responsibilities c)-the planner is not qualified d)-accurate contractor information e)-reduction in equipment redundancies f)-accurate stores information

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?

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