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ME121-Engineering Thermodynamics Questions with Correct Answers
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System Correct Answer-rigid body bounded by certain boundaries Surroundings Correct Answer-everything external to the system Boundary Correct Answer-interface between the system and the environment Closed system Correct Answer-always contains the same matter. Allows energy transfer but the...

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  • August 21, 2024
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ME121-Engineering Thermodynamics Questions with
Correct Answers
System Correct Answer-rigid body bounded by certain boundaries


Surroundings Correct Answer-everything external to the system


Boundary Correct Answer-interface between the system and the
environment


Closed system Correct Answer-always contains the same matter. Allows
energy transfer but there can be no transfer of mass across its boundary.


Open system Correct Answer-Allows both energy and mass transfer


Isolated system Correct Answer-It is a type of system which is not in
any way influenced by its surroundings.


Property Correct Answer-a macroscopic characteristic of a system such
as
mass, volume, energy, pressure, and temperature to which a numerical
value can be assigned
at a given time without knowledge of the previous behavior (history) of
the system.

,State Correct Answer-refers to the condition of a system as described by
its properties. can often be specified
by providing the values of a subset of the properties.


Process Correct Answer-When any of the properties of a system change,
the state changes and the system is said
to have undergone a _____________. It is a transformation from one
state to another.


Steady state Correct Answer-If a system exhibits the same values of its
properties at two different times, it is in the
same state at these times. A system is said to be at ________________ if
none of its properties
changes with time.


Transient Correct Answer-A response that unpredictable and changes
over time.


Cycle Correct Answer-When a system in a given initial state goes
through a number of different changes of state or processes and finally
returns to its initial state, the system has undergone what kind of
process?


Extensive property Correct Answer-Its value for an overall system is the
sum of its values for the parts into which the system is divided. a
property that changes when the size of the sample changes and it can
also change with time, e.g., mass, volume, energy

, Intensive property Correct Answer-values are independent of the
size/extent of the system; may vary from place to place within the
system at any moment, (maybe functions of both position and time) e.g.,
density, temperature, pressure, specific volume


Equilibrium Correct Answer-This refers to when a system has reached a
state where there is no spontaneous change over time.


True Correct Answer-True or False. A quantity is a property if its
change in values between two states is independent of the process.


Kelvin-Planck Statement Correct Answer-It is impossible for any device
that operates on a cycle to receive heat from a single reservoir and
produce a net amount of work.


Phase Correct Answer-refers to a quantity of matter that is homogeneous
(all solid, liquid or gas) throughout in both chemical
composition and physical structure.


False Correct Answer-True or false. A system cannot contain
one or more phases


Phase boundaries Correct Answer-In the phase diagram, it is the line
separating two different phases.

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