NC770 - ELECTRONIC CONTROL AND DIGITAL ELECTRONICS LEVEL 3 QP


7.2 Study the ladder diagram below and answer the questions that follow. FIGURE 1: LADDER DIAGRAM 7.2.1 What do the symbols X 1 and Y represent? (2) 7.2.2 How many rungs does the ladder diagram contain? (1) 7.2.3 Describe how the ladder diagram works. (5) 7.2.4 Predict the end-result of the ladder diagram by developing a truth

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