Q1. Describe with the aid of a simple sketch the arrangement of the three-phase winding of an alternator showing the neutral point. Explain why for most ships the neutral point is insulated. Explain why in some installation the neutral point in earthed. (16)
Q2. Diesel electric propulsion is now being chosen as the power plant for an increasingly wide variety of vessels. (16) a) Sketch a simple layout of such an installation. b) Explain the advantages of selecting such a plant.
Q1. What are semiconductor devices? What are its advantages over thermionic devices? With respect to semiconductor devices describe working principle and application of the following: (16)
(a) Zener Diode
(b) Transistor
(c) Photocell
(d) Thyristor
Q9. Briefly discuss the following with respect to safety of navigation:
a) Bridge Navigation Watchkeeping Alarm System (BNWAS) (6)
b) Long Range Identification and Tracking of ships (LRIT). (5)
c) Voyage Simplified Voyage Recorder (VDR/S-VDR) (5)
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