Q2. Tank liquid level sensors are an integral part of ships. Describe with the aid of suitable sketches the working principle of: (a) Capacitive type level sensor (6) (b) Ultrasonic level sensor (5) (c) Float (5)
Q1.a) Explain three methods of overcurrent protection for electrical circuit. (8)
b) Explain with aid of diagram, the meaning of the term inverse current time characteristic (8)
Q3. a) Sketch a circuit diagram for an automatic voltage regulator illustrating how the A.V.R. utilizes a Silicon-controlled rectifier to control the excitation system for an alternator. (8)
b) Describe how the A.V.R. monitors output and controls the excitation system. (8)
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