Q1.        Draw a loop diagram of a pressure control system, which works as follows: - A pneumatic valve is out...

Q1.        Draw a loop diagram of a pressure control system, which works as follows:

- A pneumatic valve is out in the field;

- The controller is in the control room, and is not accessible to the operator.  Please note that this controller also has the capacity to display the PV;

- A PLC, mounted in an MCC room, obtains the level signal, and generates a high and low alarm.  The operator is capable of altering the high and low alarm values.            

In your own words please explain how the following circuit will operate.

          Marks - 10

.    Please see the diagram below. Create this drawing using a drawing software. You can use any drawing software available at your work (e.g. MS Visio, Microstation etc.).

For students with no access to software, Smartdraw is a free software that is available online. Note that it is free for only 7 days after download. If using Smartdraw, please visit the link below to watch a pre-recorded webcast to assist with use of Smartdraw.It gives you details about a downloadable trial SMARTDRAW software which you can download and use for practice drawings.The trial software only works for 7 days, so get the excercises done before the software expires.

 The link below takes you to the pre-recorded webinar:

 https://ca-sas.bbcollab.com/site/external/jwsdetect/playback.jnlp?psid=2011-05-30.2054.M.CFF3C47000D2B343ACDC58E5312B4C.vcr&sid=2010356

      Marks - 10

Marks can be given for drawing this circuit using any software and showing the symbols and circuit representation as in the drawing,.

Comment on the operation of the following motor control circuit.

           Marks - 10