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Q3. a) Explain with the aid of a diagram, a controller utilizing proportional plus integral action. (6)

b) List out the Advantages and Disadvantages of electric propulsion system (5)

c) Explain briefly what you know about “Pulse Width Modulation” and how it can be applied for propulsion control. (5)

Q5. A 400V, 4-pole, 50 Hz, 3-phase, 10 hp, star connected induction motor has a no load slip of 1% and full load slip of 4%, find the following:

(i) Syn speed

(ii) No -load speed

(iii) Full load speed

(iv) Frequency of rotor current at full load

(v) Full – load torque (16)

Q7. a) Explain working of galley CO2 firefighting control system (8)

b) sketch circuit diagram and explain working of electrical oven fitted in a ship’s galley. (8)

Q7. (a) With reference to working onboard the Deck Cargo crane, elaborate the hazards associated with working at heights? (5)

(b) What risk mitigation measures will you take to mitigate the hazards identified by you while working at heights? (6)

(c) Which all risk assessment checklists, work checklists and work Permits will you fill up before commencing the work and who will authorize the work permits? (5)

Q7. a) Describe the routine tests required for self-contained breathing apparatus sets (8)

b) Describe the procedure to be adopted to find missing personnel in a smoke-filled accommodation area. (8)