1. Design a 4-input logic circuit which outputs logic "1" when the input is a prime number only. Inputs are x,y,z, and w. Output is F(x,y,z,w). Prepare a truth table and obtain a simplified expression for F using the K-map technique. Then draw the logic circuit using minimal number of gates. y

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Discuss the concept of integrated circuits (ICs) and how microchips are a subset of ICs. What advantages do microchips offer compared to discrete components?

Q5. Predictive maintenance is to be applied to an industrial conveying system. a) Discuss and illustrate the difference between reactive, preventative, and predictive maintenance. b) Describe several of the techniques that could be used to develop a predictive maintenance system for the conveyor system. Consider some of the sensing techniques that might be used and what parameters might be measured to detect component degradation. c) If the predictive maintenance system described in b) detects that the conveyor system is vibrating abnormally, discuss what condition this could indicate and what maintenance might be required.