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WorksheetsFinal control element
Total questions: 16
Worksheet time: 23mins
What are the four main process variables in instrumentation specialization?
Weight, Length, Time, Resistance
Pressure, Temperature, Flow, Voltage
Speed, Volume, Density, Current
Pressure, Temperature, Flow, Level
What are the two main parts of a control valve?
Gauge and Transmitter
Actuator and Valve Body
Piston and Diaphragm
Disc and Plug
What does Fail-Safe condition of a valve refer to?
The type of valve body design
The type of power used to operate the actuator
The position of the valve in the event of air/signal failure
The type of valve closure member
What are the three types of Fail-Safe condition based on the position of the valve in the event of failure of air supply?
Hydraulic, Electric, Pneumatic
Linear, Rotary, Fail Lock
FTO, FTC, FL
Open, Close, Lock
What is the part of a control valve which converts the signal from the controller into necessary force used to position the valve closure member?
Actuator Sizing
Stroke Time
Pneumatic Actuators
Valve Positioners
What is the range of pneumatic pressure required to begin moving the stem to fully stroke the actuator over the entire travel length?
Bench Set
Flow Characteristics
Full Stroke Test
Partial Stroke Test
What is the offline diagnostic test performed on valves over its entire travel length in steps to detect any abnormalities?
Partial Stroke Test
Full Stroke Test
Bench Set
Flow Characteristics
What is the online diagnostic test performed on a valve to detect any failure modes without disrupting the process?
Bench Set
Full Stroke Test
Flow Characteristics
Partial Stroke Test
What is the primary purpose of a Pressure Safety/Relief Valve?
To regulate the air pressure and remove contaminants
To change an electrical current signal to a proportional pneumatic output
To protect a pressurized vessel or system during an over pressure event
To identify the open or close position of the valve
What is the closure member of the butterfly valve?
Gate
Ball
Disc
Plug
What are the parts of the valve trim ?
Name the valve
Name the valve
Name the valve
Name the device
Closure members of the 4 valves :
