Define Normal Status for each of the Process Switch
Examine process switches normal status, such as pressure switch, level switch, temperature switch, and flow switch.
Practical Questions
In Practical Instrumentation Questions section, you will get industry related technical questions with problem solving approach,
Determine Effect of Each Fault for Pneumatic Force-balance System
Determine the final effect of each fault for this pneumatic force-balance system. Be sure to explain the fault effects.
Pneumatic Force Balance Instrument
The sensitivity and linearity of pneumatic force-balance instruments improved with a pneumatic amplifying relay.
Motion-Balance and Force-Balance Instruments
Identify the pressure instruments whether each one uses the principle of motion-balance or the principle of force-balance in the examples.
Baffle Nozzle Question
In the following baffle nozzle system, the nozzle pressure is allowed to react against any external force by generating a force with a bellows unit, to push the baffle away from the nozzle.
Questions on Pneumatic Transmitter and Repeater
Calibrate a pneumatic pressure transmitter to an input range of 0 to 200 inches of water, with an output range of 3 to 15 PSI.
Which Instrument is Faulty? Transmitter, Recorder, or Controller
Which instrument is faulty – transmitter, recorder, or controller, or is it impossible to tell from the given information?
Simple Pressure Repeater
A pressure repeater is a device used to duplicate the pressure inside an enclosed process vessel with clean pneumatic air.
Flapper Nozzle Questions
One of the most basic components of a pneumatic instrument is the so-called flapper nozzle, or baffle nozzle assembly.
A Series of False Pressure Alarms
An operator reports a series of false pressure alarms reported by pressure indicating controller or recorder every few minutes.