Understanding Pressure and Its Measurement

The video tutorial from Instrumentation Academy explains the concept of pressure, starting with the basics of force and pressure. It covers how liquids and gases exert pressure, the concept of absolute vacuum, and atmospheric pressure. The video also discusses how pressure is measured using gauge and absolute pressure methods, and concludes with a summary of the key points.

What happens to the pressure on a surface if the area over which a force is applied decreases?

• The pressure becomes zero.

• The pressure increases.

• The pressure remains the same.

• The pressure decreases.

How does the pressure exerted by a liquid change as you go deeper into the liquid?

• It decreases.

• It remains constant.

• It increases.

• It fluctuates randomly.

What is the term for the pressure inside a container when a vacuum pump removes almost all gas molecules?

• Hydrostatic pressure

• Absolute zero pressure

• Atmospheric pressure

• Gauge pressure

What instrument is used to measure atmospheric pressure?

• Hygrometer

• Barometer

• Thermometer

• Anemometer

How does atmospheric pressure change as altitude increases?

• It decreases.

• It fluctuates randomly.

• It remains constant.

• It increases.

What is the standard atmospheric pressure at sea level in Pascals?

• 101000 Pa

• 100000 Pa

• 102000 Pa

• 101325 Pa

What does a gauge pressure reading of 0 PSI indicate before connecting it to any process?

• The gauge is malfunctioning.

• Absolute pressure is zero.

• Atmospheric pressure is not considered.

• No pressure is present.

What is the reference point for measuring absolute pressure?

• Atmospheric pressure

• Hydrostatic pressure

• Absolute zero pressure

• Gauge pressure

How is absolute pressure calculated?

• Gauge pressure plus atmospheric pressure

• Gauge pressure minus atmospheric pressure

• Absolute zero pressure plus gauge pressure

• Atmospheric pressure minus gauge pressure

What does a pressure gauge measure when connected to a container filled with liquid?

• Absolute pressure

• Gauge pressure

• Atmospheric pressure

• Hydrostatic pressure