Engineering, 25.11.2019 23:31 Jazzy2006
One and one-half pounds of water within a piston-cylinder assembly execute a carnot power cycle. during isothermal expansion, the water is heated at 500 degree f from saturated liquid to saturated vapor. the vapor then expands adiabatically to a temperature of 100 degree f and a quality of 70.38%. sketch the cycle on p-v coordinates. evaluate the heat transfer and work for each process, in btu. evaluate the thermal efficiency.
Answers: 1
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 of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.
Answers: 2
Engineering, 04.07.2019 19:10
Ahelical coil spring has a mean diameter of 50 mm, a wire diameter of 5.5 mm and is wound with a pitch of 10 mm. the spring steel has an ultimate strength of 1250 mpa. find the force needed to compress the spring solid and the wire stress in this condition. state whether the spring will return to its initial length.
Answers: 1
Engineering, 04.07.2019 19:20
A5 kg block of fe is dropped into a very large vat of water. the fe and water initial temperatures are 95 and 25 c, respectively. the fe final temperature is 25 c and the water can be treated as a thermal reservoir,. treated as a thermal reservoir take the water to be the system and determine the entropy generation. report vour answer in kj/k.
Answers: 1
One and one-half pounds of water within a piston-cylinder assembly execute a carnot power cycle. dur...
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