Question:
Control volume refers to a:
Control volume refers to a:
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A control volume is a fixed region in space — mass and energy can cross its boundary. It’s key for analyzing open systems.
Updated On: Jun 21, 2025
- Specified mass
- Fixed region in the space
- Closed system
- Specific Volume
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The Correct Option is B
Solution and Explanation
In thermodynamics and fluid mechanics, a control volume is defined as a fixed region in space through which mass and energy can flow.
It is used in the analysis of open systems — where fluid crosses the system boundary — and is essential in applying the conservation laws.
- A control volume has a defined boundary (real or imaginary), called the control surface.
- Unlike a closed system, it allows mass transfer.
- The control volume is typically used in applications like turbines, pumps, and nozzles.
Incorrect options:
- (1) Specified mass refers to a closed system (control mass).
- (3) Closed system has no mass crossing the boundary.
- (4) Specific volume is a property, not a system concept.
It is used in the analysis of open systems — where fluid crosses the system boundary — and is essential in applying the conservation laws.
- A control volume has a defined boundary (real or imaginary), called the control surface.
- Unlike a closed system, it allows mass transfer.
- The control volume is typically used in applications like turbines, pumps, and nozzles.
Incorrect options:
- (1) Specified mass refers to a closed system (control mass).
- (3) Closed system has no mass crossing the boundary.
- (4) Specific volume is a property, not a system concept.
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