Q2. Draw and explain the shape of the characteristic curve of a p-n junction diode in forward and reverse bias modes (16)
Q3. (a) Sketch a water-tight door and frame showing manner of attachment to bulkhead and the additional reinforcement carried by the bulkhead to compensate for the aperture. (8)
(b) Explain how water-tightness of the door and frame mating surface is ensured with an hydrostatic pressure tending to force the faces apart. (4)
(c) Describe the means of remote closing operation of the door and state how many closing stations there are and their position. (4)
Q4. (a) Sketch the arrangement of rudder stock, bearings, glands and method of suspension of a pintleless rudder, labelling the components parts. (8)
(b) State how the bearing wear down is measured and what prevents the rudder from jumping? (8)
Q7. Enumerate the essential elements of ISM code. To what type of vessels, it is applicable. Describe various documents, certificates issued under this Code. State their validity and periodical audit and the issuing authorities (20)
Q9. With reference to exhaust valves of an auxiliary diesel engine.
(a) Describe how valves are reconditioned (8)
(b) Explain how valve timing is checked and corrected. (8)
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