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WorksheetsInstrument
Total questions: 10
Worksheet time: 50mins
Control loop is used to
optimize the process.
correct errors in transmitter readings.
reduce disturbance to process variable.
shut down the system safely in case of disturbance.
An example of a final control element is
sensors.
transmitter.
controllers.
control valve.
What is the device used to regulates the flow of material?
Recorder.
Controller.
Transmitter.
Control valve.
The necessary equipments in a closed control loop are
controller, recorder, transmitter.
recorder, safety valve, controller.
control valve, indicator, transmitter.
controller, control valve, transmitter.
The equipment used to show process value to operator is
indicator.
regulator.
transmitter.
control valve.
Difference between analog and digital signals is
Analog signal is sent from DCS to field devices, Digital signals is opposite.
Analog signal is sent from field devices to DCS, Digital signals is opposite.
Analog signal is in a range of values, Digital signals is on/off.
Analog signal is on/off, Digital signals are in a range of values.
The marshalling cabinet is used to
Write the control program
House the terminals and cables
Monitor and control the process
Run the automated control program
Loop checks are performed during
start-up.
commissioning.
site acceptance test.
factory acceptance test.
To calibrate zero value in Dissolved Oxygen probe, the technician uses
Steam.
Nitrogen gas
Liquid nitrogen.
Salt solution buffer.
The amount of dissolved oxygen in water does NOT depends on
salinity.
Viscosity.
temperature.
Atmospheric pressure.
