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Main points of this exam paper are: Integral Control Action, Open Loop Control Action, Strain Gauge, Modern Day Industry, Wheatstone Bridge Circuit, Proportional Control Action, Ladder Diagram, Linear Variable Differential, Temperature Sensor, Plc Programme
Typology: Exams
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Autumn Examinations 2008/
Module Code: MECH 7014
School: Mechanical and Process Engineering
Programme Title: Bachelor of Engineering in Mechanical Engineering – Award Bachelor of Engineering in Manufacturing Engineering – Award
Programme Code: EMECH_7_Y3, EMANF_7_Y3, EMECN_7_Y
External Examiner(s): Dr. Patrick Delassus, Mr. Alan Bateman Internal Examiner(s): Mr. Niall Morris, Mr. Matt Cotterell
Instructions: Candidates are required to answer FOUR Questions.
Duration: 2 Hours
Sitting: Autumn 2009
Requirements for this examination: Mitsubishi FX0 Programming Instruction Set
Note to Candidates: Please check the Programme Title and the Module Title to ensure that you are attempting the correct examination. If in doubt please contact an Invigilator.
Q1. (a) Describe “Open Loop control action”; give examples to illustrate your point. (13 marks) (b) Describe “Integral Control Action”. (12 marks)
Q2. (a) Sketch and describe a “Strain Gauge”. State three uses in modern day industry of a Strain Gauge. (13 marks) (b) Sketch and describe a “Wheatstone Bridge Circuit”. (12 marks)
Q3. (a) Describe ON/OFF control action, using a water tank as your example. (13 marks) (b) Describe “Proportional Control Action”. (12 marks)
Q4. (a) Sketch a PLC ladder diagram to produce the following sequence:
A+B+C+ C-B-A- (15 marks) (b) Sketch a timer circuit used in a PLC programme. (10 marks)
Q5. (a) Sketch and describe a “Linear Variable Differential Transformer”. (13 marks) (b) Sketch and describe a Temperature Sensor of your choice. (12 marks)