Q. In the Rankine cycle, what is the working fluid typically used?
A.
Air
B.
Water
C.
Refrigerant
D.
Helium
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Solution
The Rankine cycle typically uses water as the working fluid due to its favorable thermodynamic properties.
Correct Answer:
B
— Water
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Q. What is the definition of entropy?
A.
A measure of energy transfer
B.
A measure of disorder or randomness
C.
A measure of heat capacity
D.
A measure of pressure
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Solution
Entropy is defined as a measure of disorder or randomness in a system, reflecting the number of microscopic configurations that correspond to a thermodynamic system's macroscopic state.
Correct Answer:
B
— A measure of disorder or randomness
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Q. What is the primary mechanism of heat transfer in conduction?
A.
Movement of fluid
B.
Direct contact of particles
C.
Radiation of energy
D.
Phase change
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Solution
Conduction is the primary mechanism of heat transfer that occurs through direct contact of particles in a solid material.
Correct Answer:
B
— Direct contact of particles
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Q. Which of the following is a characteristic of an isothermal process?
A.
Temperature remains constant
B.
Pressure remains constant
C.
Volume remains constant
D.
Entropy remains constant
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Solution
In an isothermal process, the temperature of the system remains constant throughout the process.
Correct Answer:
A
— Temperature remains constant
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Q. Which of the following statements is true regarding heat transfer by convection?
A.
It requires a medium
B.
It occurs in solids only
C.
It is always faster than conduction
D.
It does not involve fluid motion
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Solution
Heat transfer by convection requires a medium, typically a fluid, and involves the bulk movement of that fluid.
Correct Answer:
A
— It requires a medium
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