Process control 6.1

What is pressure?

• Temperature difference
• Force per unit area
• Weight of an object
• Speed of gas molecules

Which scale is normally used for measuring pressure above atmospheric?

• Absolute
• Vacuum
• Gauge
• Manometric

What is the formula for pressure?

• Pressure = Mass × Volume
• Pressure = Force / Area
• Pressure = Area / Force
• Pressure = Volume / Temperature

A column of air with a base of one square inch exerts a pressure of ___ at sea level at ___

• 14.7 psi, sea level
• 10 psi, ground level
• 14.7 psi, mountain top
• 100 psi, sea level

Name three common scales for measuring pressure.

• Bar, Liter, Pascal
• Gauge, Absolute, Vacuum
• Joule, Newton, Watt
• Kelvin, Celsius, Fahrenheit

Which pressure scale uses atmospheric air as zero?

• Absolute
• Gauge
• Vacuum
• Barometric

A pressure gauge open to the atmosphere will read:

• 100 psi
• 0 psi
• 14.7 psi
• -14.7 psi

Gauge pressures are usually measured in:

• Barrels
• Liters
• Psi
• Volts

Which pressure scale uses zero pressure in a perfect vacuum as its starting point?

• Gauge
• Vacuum
• Absolute
• Barometric

Absolute pressure is expressed as:

• Vacuum + gauge
• Atmospheric + vacuum
• Gauge + absolute
• Gauge + atmospheric