Multiple choice questions (Explanation Requried) (1). Which of the following for
ID: 2073836 • Letter: M
Question
Multiple choice questions (Explanation Requried)
(1). Which of the following form(s) of energy is/are part(s) of the thermal energy of a system:
(A) Kinetic energy.
(B) Sensible energy.
(C) Chemical energy.
(D) Latent energy
(E) Nuclear energy.
(2). Please circle which is/are the property(ies) among the following items:
(A) Temperature.
(B) Work.
(C) Pressure.
(D) Mass.
(E) Heat.
(3). Energy can be transferred from an isolated system to its surroundings by:
(A) Mass.
(B) Heat.
(C) Work.
(D) All of the above.
(E) None of the above.
(4). An adiabatic process may never involve:
(A) Work transfer.
(B) Temperature variations.
(C) Heat transfer.
(D) Mass transfer.
(E) Reactions within the system.
(5). The 1st Law of Thermodynamics is a statement about...
(A) Temperatures scales.
(B) Whether a process can proceed in a specific manner.
(C) Energy conservation.
(C) Equilibrium processes.
(E) None of the above.
(6). Please circle the item(s), which does/do not belong to the mechanical forms of work.
(A) A body being accelerated.
(B) Heat conduction.
(C) Spring deformation.
(D) Moving boundary.
(E) Rotating shaft.
(7). The least number of independent intensive properties needed to specify a state of a simple compressible system is
(A) 1 (B) 2 (C) 3 (D) 4 (E) 5
(8). The work between two specified states of a closed system is the same regardless of the nature of the system and the pass of the process if the process is
(A) Isobaric.
(B) Isochoric.
(C) Isothermal.
(D) Adiabatic.
(E) All of the above.
(9). For a closed system undergoing a cycle the following may differ from zero…
(A) Total energy of the system at any time instant.
(B) Change in total energy of the system over the cycle.
(C) Change in the internal energy of the system over the cycle.
(D) Work transfer over the cycle.
(E) Heat transfer over the cycle.
Explanation / Answer
1) Ans - D Latent Heat
Latent heat is the part of internal energy which is required for phase transition. Rest are the other types of energy.
2) Ans - A temp C Pressure D Mass
Properties (temp, pressure, mass) are point function while Heat and work are path functions.
3) Ans - E none of the above
Isolated system is a system which undergoes no energy transfer.
4) Ans - C Heat Transfer
Adiabatic process is a process in which there is no heat transfer. Its temperature may increase or deacrease. There may be work, mass transfer. But there would never be Heat transfer.
5) Ans - C Energy conservation
1st law of thermodynamics is all about energy conservation. It states that energy can neither be created nor destroyed, but it can be converted from one form to another.
6) Ans - B Heat Conduction
Heat conduction is related to thermodynamics while rest are physical form of activities/processes.
7) Ans - B 2
A compressible system can be specified by any 2 independent intensive properties. for example pressure&volume, temperature&volume etc.
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