Gauge Pressure Measurement

Play an AI-generated podcast conversation about this lesson

What is the pressure inside a sealed vessel measured relative to?

the pressure outside the vessel (correct)

the pressure inside another vessel

standard atmospheric pressure

atmospheric pressure

A car tyre has been inflated to an indicated value of 30 psi at the local service station. What is the absolute pressure inside the tyre?

30 psi

45 psi (correct)

60 psi

15 psi

What is the difference in magnitude between two pressure readings called?

absolute pressure

hydrostatic pressure

gauge pressure

differential pressure (correct)

What subscript is sometimes added to the unit to indicate a differential pressure measurement?

d Signup and view all the answers

What is the pressure measured relative to atmospheric pressure called?

gauge pressure Signup and view all the answers

What is the unit specified as to indicate gauge pressure?

psig Signup and view all the answers

What is the reference point for absolute pressure measurement?

Perfect vacuum Signup and view all the answers

What type of pressure measurement compares the pressures between two different places?

Differential pressure Signup and view all the answers

What is the unit for atmospheric pressure in absolute pressure measurement?

psia Signup and view all the answers

Why do deodorant spray cans warn against leaving them in direct sunlight?

Increasing the temperature of the gas increases the internal pressure Signup and view all the answers

What type of pressure measurement is referenced to atmospheric pressure?

Gauge pressure Signup and view all the answers

What is the notation used to indicate an absolute pressure measurement?

A subscript 'a' Signup and view all the answers

Which unit is commonly used in Australian aviation to measure atmospheric pressure?

Hectopascals (hPa) Signup and view all the answers

What is the standard atmospheric pressure in pascals (Pa)?

101325 Pa Signup and view all the answers

Which unit is used to describe pressure in the English system of units?

Inches of mercury (in Hg) Signup and view all the answers

What is the abbreviation for pounds per square inch used to measure pressure?

psi Signup and view all the answers

Which unit is equivalent to 1 kilopascal (kPa)?

100 Pascals (Pa) Signup and view all the answers

How is pressure often expressed in the context of 'atmospheres'?

Atmospheres (atm) Signup and view all the answers