A Vacuum Gauge Connected to a Chamber | Solved Pressure Numerical | Query Point Official
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A Vacuum Gauge Connected to a Chamber | Solved Numerical Problem
This problem explains how to analyze a vacuum gauge connected to a chamber to determine pressure values. Such numerical questions are very common in Engineering Physics, Fluid Mechanics, and Thermodynamics exams.
Main Question
A vacuum gauge is connected to a chamber. Determine the pressure inside the chamber using the given gauge reading and atmospheric pressure. Assume standard conditions unless stated otherwise.
Solution:
Here
Vacuum Pressure = Pvac = 25 KPa
Atmospheric Pressure = Patm= 97 KPa
We know
that
Absolute Pressure = Pa = Patm
- Pvac
Absolute Pressure = Pa=
97-25 = 72Pa
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FAQs – Vacuum Gauge & Pressure Measurement
Q1: What does a vacuum gauge measure?
A vacuum gauge measures pressure lower than atmospheric pressure, usually expressed as how much pressure is missing relative to atmospheric pressure.
Q2: Is vacuum pressure the same as absolute pressure?
No. Vacuum pressure is measured below atmospheric pressure, while absolute pressure is measured from a perfect vacuum.
Q3: Why is atmospheric pressure subtracted?
Because vacuum gauges indicate how much pressure is below atmospheric pressure, subtraction gives the actual absolute pressure inside the chamber.
Q4: Are vacuum gauge problems important for exams?
Yes. These problems are frequently asked in engineering physics, thermodynamics, and fluid mechanics examinations.
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FAQs – Vacuum Gauge & Pressure Measurement
Q1: What does a vacuum gauge measure?
A vacuum gauge measures pressure lower than atmospheric pressure, usually expressed as how much pressure is missing relative to atmospheric pressure.
Q2: Is vacuum pressure the same as absolute pressure?
No. Vacuum pressure is measured below atmospheric pressure, while absolute pressure is measured from a perfect vacuum.
Q3: Why is atmospheric pressure subtracted?
Because vacuum gauges indicate how much pressure is below atmospheric pressure, subtraction gives the actual absolute pressure inside the chamber.
Q4: Are vacuum gauge problems important for exams?
Yes. These problems are frequently asked in engineering physics, thermodynamics, and fluid mechanics examinations.
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