Control Systems N6 November Past Papers and Memos

1. Q1 1.1 Describe what an optical chopper wheel is, and what its function is in optical 10 marks
2. Q2 2.1 Draw a neat labelled schematic diagram of a Ward-Leonard control system 10 marks
3. Q3 3.1 Explain the term hydraulics. (1) 10 marks
4. Q4 4.1 Pneumatic controllers may comprise of three cascade-connected controls. 10 marks
5. Q5 5.1 State TWO possible applications of a saw-tooth wave. (2) 10 marks
6. Q6 6.1 A step input of three units is applied to a second-order system. 10 marks
7. Q7 7.1 Complete the following sentences by filling in the missing word(s). Write only 10 marks
8. Q8 8.1 Plot, on the same 3-cycle semi-logarithmic graph paper, a point-by-point Bode 10 marks
9. Q9 DIAGRAM SHEET 3 (attached) illustrates a gain-versus-phase plot on a Nichols chart. 10 marks
10. Q10 The transfer function of an open-loop control system is given by: 10 marks

Instructions to candidates

1. Answer ALL the questions.
2. Read ALL the questions carefully.
3. Number the answers according to the numbering system used in this question paper.
4. Neat, labelled sketches of circuit diagrams must be used in the explanation of answers ONLY where a sketch is requested.
5. Do not make use of red or green ink or pencil when answering questions.
6. Make use of drawing equipment for ALL sketches.
7. Write neatly and legibly. (8080016) -3- T310(E)(N30)T