Air Pressure Regulator Questions
Air Pressure Regulator regulates the fluctuating air pressure from the receiver vessel down to a lower, more constant level....
Home » Practical Questions
Category: Practical Questions
In Practical Instrumentation Questions section, you will get industry related technical questions with problem solving approach,
Determine the Instrument Calibration Error
Determine what kind of calibration error the instrument has (zero shift, span shift, hysteresis, and/or linearity)....
Calculate the Transmitter Values
A pneumatic differential pressure transmitter has a calibrated range of −100 to +100 inches of water column and its output signal range is 3 to 15 PSI....
Pneumatic Relay Questions
Question - What is the response of this pneumatic relay to increasing pressure on each of its input ports?...
Identify the Problem in the PLC Program
Identify the problem(s) in this PLC program, and modify it so that it will work as it should....
Troubleshooting PLC Permissive Inputs
We have a problem in one of the PLC Permissive Inputs that there is a programming mistake, do the troubleshooting....
PLC Program to Control a Water Pump
PLC program to control a water pump driven by an electric motor. It will be manually started and stopped by pushbutton switches, and shut down automatically by any one of...
Overhead Product Pressure Control Loop
Examine the overhead product pressure control loop (#33) in this distillation system (in the upper-right corner of the P&ID). Suppose PR-33 shows a pressure of 48.1 PSI, while PIC-33 shows...
Problem with Sump Tank Level Transmitter
Suppose operators submitted a “trouble-call” to your instrument shop, claiming sump V-15 had an excessive liquid level inside of it (as indicated by LIR-134), and that the pump was not...
How much Pressure will Remote Seal Pressure Transmitter Indicate?
A pressure transmitter with a remote seal measures the pressure of a gas inside a process vessel. A pressure gauge directly attached to the vessel registers 19.3 PSI. The transmitter...