Q2. a) Explain the construction and working principle of three-phase induction motor used on ships. How is the direction of rotation of the motor reversed? (8)
b) Discuss the maintenance procedures for an electric propulsion motor on a ship. What common faults can occur in the motor, and how would you diagnose and repair them? (8)
Q5. a) What is single phasing of a 3 ph induction motor? (6)
b) What are the causes of single phasing? (6)
c) Explain any method of protection against single phasing? (4)
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