Pneumatic Relay Questions
Question – What is the response of this pneumatic relay to increasing pressure on each of its input ports?
Practical Questions
In Practical Instrumentation Questions section, you will get industry related technical questions with problem solving approach,
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 several “permissive” switches.
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
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
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
Three-valve Manifold on Remote Seal DP Transmitter
Explain why no one in their right mind would ever, ever, install a three-valve manifold on a DP transmitter with
Importance of Temperature in Remote Seal Pressure Transmitter
Why is temperature an important factor in pressure transmitters equipped with remote seals (sometimes called “chemical” seals)? Specifically, what temperature
What is the Purpose of Chemical Seals Pressure Transmitter?
Some pressure instruments come equipped with chemical seals consisting of diaphragm units connected to the instrument with small-bore “capillary” tubing
