Engineering, 14.02.2020 03:43 tajonae04
Moran and Shapiro, Problem 3.23 and 3.39, modified. Two kg of Refrigerant 134a undergoes a polytropic process (p×Vn = constant) in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 C. Determine the work for the process. Also, determine the heat transfer that must occur, in kJ. Hint: You will have to determine the polytropic exponent n. Repeat your calculations if the final state is, instead, 12 bar and saturated vapor. The polytropic exponent n will be different, of course
Answers: 3
Engineering, 04.07.2019 18:10
Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise
Answers: 3
Engineering, 04.07.2019 18:10
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
Engineering, 04.07.2019 18:10
Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)
Answers: 3
Engineering, 04.07.2019 18:10
Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan
Answers: 3
Moran and Shapiro, Problem 3.23 and 3.39, modified. Two kg of Refrigerant 134a undergoes a polytropi...
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