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The first example of feedback control was the application of the ____ in 1775

• Steam engine
• Flyball governor
• Waterwheel
• Telegraph
• Internal combustion engine

Which of the following is not a process variable?

• Level
• Flow
• Pressure
• Temperature
• Humidity

Process instrumentation may be categorized by...

• Location, function and power source
• State, location and function.
• Function, Quantity and Quality
• Location, state and function
• Position, state and power source

____ is a term applied to a device that uses binary numbers to represent continuous values or discrete states.

• Electrical
• Pneumatic
• Digital
• Analog
• Mechanical

What happens to the pressure in a closed container when temperature increases or decreases?

• Temperature increases=pressure increases; temperature decreases=pressure increases
• Temperature increases=pressure decreases; temperature decreases=pressure decreases.
• Temperature increases=pressure doesn't change; temperature decreases=pressure changes.
• Temperature increases=pressure increases; temperature decreases=pressure decreases
• Temperature increases=pressure decreases; temperature decreases=pressure increases

Formula that shows relationship between temperature and pressure

• P1/T1=P2/T2
• P1=T1
• P2=T2
• P1×T1=P2×T2
• P1=T2

What happens to the pressure at the bottom of a vessel when the height of the liquid increases?

• Decrease
• Increase
• Don't change
• Remain constant
• None of above

What happens to the volume of the material when temperature decreases?

• Don't change
• Increases
• Decrease
• Remain constant
• None of the above

Density is defined as....

• velocity per unit time
• force per unit area
• mass per unit volume
• temperature per unit pressure
• time per unit mass

____ principle states that as the speed of a moving fluid increases, the pressure within the fluid decreases.

• Watt's
• Faraday's
• Ohm's
• Pascal's
• Bernoulli's