Podcast
Questions and Answers
What type of pressure measurement device is typically used for high pressure applications?
What type of pressure measurement device is typically used for high pressure applications?
Which primary element reacts by creating a partition between two areas and is often made of rubber?
Which primary element reacts by creating a partition between two areas and is often made of rubber?
Which device changes resistance in proportion to the pressure applied on it?
Which device changes resistance in proportion to the pressure applied on it?
What is the standard output signal range of a pressure transmitter?
What is the standard output signal range of a pressure transmitter?
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In which system is a U-tube manometer often used?
In which system is a U-tube manometer often used?
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Which of the following pressure units is most widely used in the English system?
Which of the following pressure units is most widely used in the English system?
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What function does a pressure switch perform in a system?
What function does a pressure switch perform in a system?
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Which primary element generates a small electrical signal proportional to the amount of force exerted on it?
Which primary element generates a small electrical signal proportional to the amount of force exerted on it?
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What is the definition of volumetric flow rate?
What is the definition of volumetric flow rate?
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Which of the following units is used to measure mass flow rate?
Which of the following units is used to measure mass flow rate?
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How is mass flow rate calculated from volumetric flow rate?
How is mass flow rate calculated from volumetric flow rate?
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What does the symbol Q represent in flow measurements?
What does the symbol Q represent in flow measurements?
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When converting from cubic meters per second (m³/s) to liters per minute (L/min), what factor is used?
When converting from cubic meters per second (m³/s) to liters per minute (L/min), what factor is used?
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If a flow rate is 4.403 m³/h, what is the equivalent flow rate in gallons per minute (gpm)?
If a flow rate is 4.403 m³/h, what is the equivalent flow rate in gallons per minute (gpm)?
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Which of the following is NOT a typical unit for measuring volumetric flow rate?
Which of the following is NOT a typical unit for measuring volumetric flow rate?
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What output corresponds to 1 US gallon per minute (gpm) in liters per minute (L/min)?
What output corresponds to 1 US gallon per minute (gpm) in liters per minute (L/min)?
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Study Notes
Pressure Measurements: Primary Elements
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Bourdon Tube: C-type, helical, and spiral types used in pressure gauges. C-type used for ordinary applications, helical and spiral for high-pressure applications.
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Diaphragm: Made of rubber, creates a partition between two areas. Moves and reacts based on applied pressure.
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Bellows: A device that expands or retracts due to pressure.
Pressure Measurements: Other Elements
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Strain Gauge: Changes resistance in proportion to applied pressure. Increased pressure leads to increased resistance.
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Piezoelectric Transducer: Quartz crystal device that creates a small electrical signal proportional to applied force.
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Variable Capacitance Transducer: Two plates; capacitance changes with distance between plates, which is proportional to the pressure acting on the plates.
Units of Pressure
- Various pressure units exist, PSI (pounds per square inch) and BAR being widely used in different systems.
- A conversion table is provided for various pressure units (e.g., PSI to kPa, mmHg, etc.).
- The SI unit for pressure is Pascal (Pa).
Local Reference
- Pressure gauges are used for local pressure indication.
- A U-tube manometer is used for differential pressure measurements.
- Pressure alarms are checked using gauges/instruments for verification.
Remote Control
- Pressure switches and transmitters measure pressure and send signals to controllers.
- Switches can be used to sound alarms or as emergency cut-off mechanisms for electrical signals.
- Pressure transmitters output a standard signal (4-20mA or 0.2-1.0 Bar).
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Description
Test your knowledge on various pressure measurement techniques including Bourdon tubes, diaphragms, and strain gauges. This quiz covers the primary and other elements used in pressure gauges as well as the units of pressure. Get ready to explore how these devices work and their applications!
