STUPIDSID
1 (a)
Draw a block diagram of a PLC showing the main functional items. Explaining the functions of each block, also.
7 M
1 (b)
Define following terms with respect to Process control:
(1) Offset (2) Variable Range (3) Neutral Zone (4) Control Lag (5) Dead Time (6) Cycling (7) Error.
(1) Offset (2) Variable Range (3) Neutral Zone (4) Control Lag (5) Dead Time (6) Cycling (7) Error.
7 M
2 (a)
What is a controller mode? Explain characteristics of two position and multi-position discontinuous controller modes.
7 M
Answer any two question from Q2 (b) or Q2 (c)
2 (b)
Discuss the characteristics and applications of Proportional control mode.
7 M
2 (c)
Discuss the characteristics and applications of PI composite control mode.
7 M
Answer any two question from Q3 (a), (b) or Q3 (c), (d)
3 (a)
Explain ladder diagram elements and its applications.
7 M
3 (b)
What kind of automation would you recommend for manufacturing? (Fixed/Flexible/Programmable): (1) Light bulbs (2) Garments (3) Textile (4) Cement (5) Printing (6) Toys (7) Pharmaceuticals.
7 M
3 (c)
Explain Timer and Counter instructions with timing diagram for PLC.
7 M
3 (d)
Explain Various types of Automation Techniques applied in Production Systems with suitable example.
7 M
Answer any two question from Q4 (a), (b) or Q4 (c), (d)
4 (a)
What is DCS? Draw a hierarchical DCS structure and explain function of each level.
7 M
4 (b)
Explain different types of displays in DCS.
7 M
4 (c)
Explain the concept of networking in DCS. Also explain various network topologies.
7 M
4 (d)
Explain in detail the input-output module used in PLC.
7 M
Answer any two question from Q5 (a), (b) or Q5 (c), (d)
5 (a)
Define the variables in the system of Figure-1 that constitutes the process load.
7 M
5 (b)
Develop a ladder diagram for temperature measurement and control system shown in Figure-2.
7 M
5 (c)
Explain the three main components of SCADA.
7 M
5 (d)
A controlling variable is a motor speed that varies from 800-1750 rpm. If the speed is controlled by a 25 to 50v dc signal, calculate (1) the speed produced by an input of 38v, (2) an input voltage require for speed 1446 rpm and (3) the speed calculated as a percent of span.
7 M
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