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Thermo Exam 2. Questions with Solutions
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Exam of 4 pages for the course Engineering Thermodynamics at Engineering Thermodynamics (Thermo Exam 2)
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Thermo Exam 2Which one of the following items is NOT an example of duplicate submission under the
KGCOE Honesty Policy? - answerSubmitting work for faculty evaluation in a single
course that relies upon data from earlier work within the same course.
Pure water is in a sealed container held at a pressure 25 [bar]. The specific volume is
1.0784 x 10-3 [m3/kg]. Which answer best describes the temperature of the water at
this condition? - answer140 [C]
Which of the following thermodynamic devices would typically assume W_dot = 0? -
answerHeat Exchanger
Nitrogen gas passes through an insulated diffuser at steady state. The inlet velocity is
1000 [ft/s] and the outlet velocity is 10 [ft/s]. The inlet temperature is 290 [R]. What is
the Temperature at the exit of the diffuser [R]? - answer370 [R]
A compressor and pump are similar in that they are typically used to increase the
pressure of a liquid. - answerFalse-A pump is typically used when the substance is a
liquid and a compressor is typically used when the substance is a gas
An unknown gas has a molecular weight of 35 [kg/kmol]. Which answer best describes
the specific gas constant of that gas? - answerR = 0.2375 [kJ/(kg K)]
For the Shell and Tube Heat Exchanger shown, an analysis has been performed such
that the 1st Law of Thermodynamics reduces to:
0=mihi-mehe
Which of the following assumptions have been made. - answerThe system is passive,
adiabatic, and at steady state
Which of the following items best describes a "control volume" in thermodynamics? -
answerHeat, Work, and Mass may cross the control surface.
Water enters a turbine at T = 600 [C] and p = 1.0 [MPa]. The velocity of the flow is 20
[m/s]. The elevation of the system is 0 [m]. The mass flow rate of through the system is
10 [kg/s]. What is the rate of energy entering the control volume with the mass? -
answer37.0 [MW]
An incompressible liquid enters into a rigid pipe with a diameter of 1 [ft] at 1 [ft/s]. After
travelling some distance through a network of pipes, the same liquid exits in a pipe with
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