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Q3. With reference to “ISM Code” write short notes on:

A. Masters Review,

B. Requirement and Advantages of Familiarization of seafarer onboard,

C. Designated Person Ashore (DPA)

D. Functional requirements for a Safety Management System.

Q2. With reference to Roll-on Roll-off ferries –

A. Describe the problem of free surface effect;

B. Explain how it is intended that water should be cleared from car or cargo decks;

C. Describe possible methods for improving the stability and survivability of these vessels.

Q9. With respect to the operation of two stage reciprocating air compressor. Explain:

A. The causes of occasional lifting of 2nd stage relief valve.

B. Breakage of valve plates.

C. Puncture of bursting disc of 1st stage intercooler.

D. Noticeable reduction in capacity of the compressors over a period of time.

Q9. Describe the phenomena of vibration in marine diesel engine. Explain the terms:

(a) Transverse Vibration (b) Torsional Vibration (c) Resonance (d) The role of vibration dampers.

Q1. You have been appointed as the Second Engineer of an eight years old vessel, recently purchased by your shipping company. Write a report to the engineering superintendent covering the inspection of main propulsion machinery carried out by you, to ensure its trouble free operation.

Q1. With respect to the High Voltage power systems installation, explain the different types of circuit breaker that are used, comparing them on merits and de-merits. Describe the theory of arc phenomenon and the mechanism fitted to mitigate the arc.

Q4. A. Draw a plan to deal with fire in accommodation, including co-ordination with shore facilities in port, taking account of the ship’s fire control plan;

B. Explain how drills and practices should be-organized with reference to the above.

Q3. Give a reasoned opinion as to the validity of the following assertions concerning ship structure:

A. Crack propagation in propeller shaft ‘A’ brackets or spectacles frames is indicative of inadequate scantlings and strength;

B. The adequate provision of freeing ports is as critical to seaworthiness as watertight integrity.

Q1. Describe TWO methods of tracing a subsurface crack in a machinery component. Explain with reasons which one of the two methods mentioned above is the most appropriate for detecting cracks in engine crankshafts.

Q2. What is soft starting of an Induction motor? Describe with a circuit using thyristors used for soft starting. Discuss its advantages and dis-advantages.

Q3. With reference to 2-Stroke Slow Speed Engine:

A. Sketch and describe Main Engine Exhaust Valve.

B. List out a procedure for test of Main Engine Exhaust Valve after overhaul.

Q7. With respect to Energy efficient running of ships;

(a) Sketch and explain the optimization of propeller hull interface flow devices and improvement of propulsion efficiency.

(b) sketch and explain the optimization of Auxiliary machinery using VFDs.

Q1. (a) What is free surface effect? How can be avoided or reduced.
(b) Give the components of ships resistance while vessel is ‘enroute’.

Q6. With respect to the hazardous areas of tankers,

A. Explain the term flameproof (Ex d) for electrical equipment;

B. State the type of electrical equipment that would be protected in this way.

C. List likely defects of flameproof equipment.

Q3. (a) With the aid of a simple sketch, explain the “trouble spots” in a basic air-conditioning unit and with reference to your sketch, explain the following: -

(a). How the problem of increase in humidity of cooled air is overcome?

(b). How discomfort caused by the excessive drying effect of heated air is overcome?

Q1. Differentiate with the aid of simple sketches between the following types of electronic circuits;

A. Rectifier circuit;

B. Amplifier circuit;

C. Oscillator circuit.

Q7. With reference to the 4-stroke medium speed engines:

A. Define the cause and effect of thermal stressing in cylinder Heads, liners and pistons.

B. Explain why thermal stressing are aggravated with increase in cylinder bore.

C. Explain how stress concentration and its effects are relieved by maintenance and operational practices.

Q9. Sketch and describe the refrigeration system of a container carrying bananas only. How does the controlled atmosphere of the container extend the green life and shelf life of bananas? How is the airflow system designed?

Q3. With reference to the Maritime Labour Convention (MLC) 2006, discuss the requirements for seafarers regarding: -

A. Minimum age to work onboard vessels,

B. Seafarer’s Employment agreements

C. Hours of work and hours of rest.

Q1. (a) Draw the mid ship section of a double hull oil tanker & name each part.

(b) What is Bow Flare? Why is it so important in Bulk Carriers?

Q3. Explain the matching of an induction electric motor to a pump required for main circulating duty, with the aid of pump characteristic and torque/ship diagrams.

Q9. Abnormal vibration has been observed in an HFO purifier while in operation. Explain the areas you plan to investigate for rectifying the faults and put back the purifier back to normal operations keeping in view that no reduction in vibration has been noticed even after desludging the purifier couple of times.

Q2. How explosion occurs in the starting air line of an internal combustion engine and how can the possibility of such an occurrence be reduced? Sketch and describe devices, which may be fitted to reduce the severity of such an explosion. State the attention which air starting valves should be given before stand by.

Q7. With reference to Gear pumps used for lubricating oil transfer.

(a) Sketch and describe a gear type pump indicating the flow of fluid.

(b) state the materials that gear type pump components may be manufactured from.

(c) specify THREE applications that are suitable for the employment of gear type pumps.

Q3. With regard to new sulphur cap of 0.5% w.e.f. 1st Jan.2020, list the challenges likely to be faced onboard. What are the options in case a vessel is unable to get compliant fuel.

Q3. (a) Considering the vessel as a compound beam define Bending moment shearing force. Which is the point of Maximum Bending Moment?

(b) Sketch and Describe Hatch coaming of a large bulk carrier.

Q5. A. State the circumstances owing to which it may be necessary to renew an exhaust valve;

B. Explain how the exhaust valve is removed and fitted back;

C. State the important checks to be made on the engine before after fitting the exhaust valve.

Q5. With reference to the condition monitoring of electrical machinery:

A. State TWO important parameters that may be recorded;

B. Explain how the parameters are measured and what defects may be revealed.

Q2. Sketch and describe an overview of the electronic controlled camshaft-less engine with respect to the following operations:

a. Fuel Injection system.                   b. Exhaust valve actuator system.

c. Cylinder lubrication system

Q2. Cast iron is most widely used metal after steel in Marine Engineering. Most cast irons consist of graphite in steel like matrix. Discuss the variation of properties that may arise with reference to pearlitic grey cast iron and spherical grey cast iron. Describe briefly the treatment necessary to produce these two types of Irons.

Q6. Prepare a proposal for safe manning requirements for a ship of your choice, considering frequent port calls, rest hour management and high risk areas.

Q6. A. Describe how the force on the ship’s bottom and the GM vary when grounding takes place.

B. A ship of 8,000 tonnes displacement takes the ground on a sand bank on a falling tide at an even keel draft of 5.2 metres. KG 4.0 metres. The predicted depth of water over the sand bank at the following low water is 3.2 metres. Calculate the GM at this time assuming that the KM will then be 5.0 metres and that mean TPC is 15 tonne.

Q6. A. Explain what is meant by the terms wave form, frequency and average value.

B. A moving coil ammeter, a thermal ammeter and a rectifier are connected in series with a resistor across a 110 V sinusoidal a.c. supply. The circuit has a resistance of 50 to current in one direction and, due to the rectifier, an infinite resistance to current in the reverse direction. Calculate:

(i) The readings on the ammeters; (ii) The form and peak factors of the current wave.

Q5. A). Describe the procedure for overhauling a boiler safety valve and explain using sketches where necessary, those parts, which require close attention.

B). Describe the procedure for setting of boiler safety valves.

Q6. During recent months a number Of fuel injector needle valves have seized in their bodies during engine operation.
a. Explain the effects on engine operation.
b. State the possible causes.
c. As Second Engineer, state with reasons, the instructions to be issued in order to minimize this problem.

Q9.  Reverse osmosis is one of the alternative method for shipboard production of drinking water.

(a)  Describe using simple diagrams if necessary,  the principle of reverse osmosis.

(b) (i) Sketch a line diagram showing a single pass system for producing fresh water from sea water

(ii) Describe such a system.

Q7. As a second engineer how will you plan to reduce the Energy Efficiency Operating Index of your ship?

Q10. A. List the precautions necessary before an inclining experiment is carried out.

B. A box shaped vessel, 50 metres long × 10 metres wide, floats in salt water on an even keel at a draft of 4 metres. A centre line longitudinal watertight bulkhead extends from end to end and for the full depth of the vessel. A compartment amidships on the starboard side is 15 metres long and contains cargo with permeability 30%. Calculate the list if this compartment is bilged. KG = 3 metres.

Q8. A. Why is it important to maintain high efficiency of operation?  And low values of voltages regulation for power transformers?

B. A 100 KVA transformer has 400 turns on the primary and 80 turns on the secondary. The primary and secondary resistances are 0.3 and 0.01 respectively, and the corresponding leakage reactance’s are 1.1 and 0.035 respectively. The supply voltage is 2200 V. Calculate:

(i) The equivalent impedance referred to the primary circuit;

(ii) The voltage regulation and secondary terminal voltage for full load having a power factor of (i) 0.8 lagging and (ii) 0.8 leading.

Q7. Describe with a neat sketch the principle and operation of Biological & Chemical Sewage treatment plant.

(a) What do you meant by B.O.D. What is the significance of B.O.D.

(b) What are the discharge criteria according to MARPOL Regulations?

(c) What routine maintenance is carried out on such Sewage treatment plant?

Q6. With Respect to main engine turbocharger;

A. Explain why cleanliness throughout the turbochargers system is critical to engine performance?

B. Describe in-service cleaning procedure for gas and air sides of a turbocharger indicating safety precautions to be observed?

Q2. A. Describe the procedure to be adopted for the inspection of a safety valve fitted to an exhaust gas fired auxiliary boiler stating, with reasons, which parts should receive particularly close attention.

B. Describe the procedure for the setting of safety valves of exhaust gas operated auxiliary boilers;

C. Explain the required action a watch-keeping engineer should take after the setting of safety valves as in (B)

Q6. State the various documents pertaining to a ship that a port state control inspector would ask for during port state control inspection. If your vessel-gets detained by the PSC owing to a deficiency, what would be your action for redressal

Q8. A. Define longitudinal centre of gravity (LCG) and longitudinal centre of buoyancy (LCB).

B. A ship 120m long floats has draughts of 5.50m forward and 5.80m aft; MCT1 cm 80 tonne m, TPC 13, LCF 2.5m forward of midships. Calculate the new draughts when a mass of 110 tonne is added 24m aft of midships.

Q9. A. List the factors that determine the starting torque of the three-phase induction motor. How does this torque generally compare with the value of the rated torque?

B. The low-voltage release of an a.c. motor-starter consists of a solenoid into which an iron plunger is drawn against a spring. The resistance of the solenoid is 35 ohm. When connected to a 220 V, 50 Hz, a.c. supply the current taken is at first 2A, and when the plunger is drawn into the “full-in” position the current falls to 0.7 A. Calculate the inductance of the solenoid for both positions of the plunger, and the maximum value of flux-linkages in weber-turns for the “full-in” position of the plunger.

Q8. Explain in detail how you would isolate one of sprinkler system for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service.

Q4. While operating at Sea during rough weather conditions, fire sparks have been observed coming out from the chimney. On investigation, it has been observed that the fuel contains considerable quantity of water and sludge. As the Second engineer of the vessel. Explain:
A. Immediate actions taken to rectify the problem.
B. Precautions you take to avoid recurrence of this type of problem.

Q8. With reference to Air-conditioning system onboard your vessel:

(a) Sketch and describe high pressure cut-out in a refrigeration system.

(b) The refrigeration compressor has stopped due to operation of the h.p cut-out Explain.

(i) The possible cause.

(ii) How these causes would be found and possible remedies.

(c) What steps are taken if the compressor “short-cycle” on low pressure cut-out?

Q8. The speed of a ship is increased to 18% above normal for 7.5 hours, and then reduced to 9% below normal for 10 hours. The speed is then reduced for the remainder of the day so that the consumption for the day is the normal amount. Find the percentage difference between the distance travelled in that day and the normal distance travelled per day.

Q2. With reference to free fall lifeboat of an ocean-going ship:

A. Periodical maintenance, tests and checks on lifeboat and releasing gear.

B. Secondary means of lowering.

C.  Lifeboat Drills.

Q6. A. With the aid of delta and star connection diagrams, state the basic equation from which   delta – star – delta conversion equation can be derived.

B. Three batteries A, B and C have their negative terminals connected together, between the positive terminals of A and B there is a resistor of 0.5 ohm and between B and C three is a resistor of 0.3 ohm,

i. Battery A 105 V, Internal resistance 0.25 ohm’

ii. Battery B 100 V, Internal resistance 0.2 ohm

iii. Battery C 95 V, Internal resistance 0.25 ohm

Determine the current values in the two resistors and the power dissipated by them.

Q9. List the maintenance routines you plan to carry out on the deck hydraulic cranes, winches and mooring machineries before arrival port after a long voyage, considering the fact that cargo operation is solely dependent on the proper Functioning of the crane and winches.

Q4. State how EACH of the following defects becomes apparent, describe its effect on engine operation or safety and indicate the corrective action required to restore normal engine condition;

A. Leaking air inlet and exhaust valves;            B. Leaking air start valve;

C. Cracked cylinder liner;                              D. Broken piston rings

Q9. With reference to Inert Gas Generator fitted on gas carriers:

a. Sketch a line diagram showing a typical 'Inert Gas System' used for inerting in gas carriers, labeling the component parts.

b. Describe the system.

c. State the function of a chiller used in this type of inert gas generator.

Q10. With reference to fixed pitch propellers:
a. Explain Propeller Slip and Propeller Thrust. (6)
b. The shaft power of a ship is 3000 KW, the ship’s speed V is 13.2 knot. Propeller rps is 1.27. Propeller pitch is 5.5m and the speed of advance is 11 Knots. Find:
i. Real Slip
ii. Wake fraction
iii. Propeller thrust, when its efficiency, η = 70% (10)

Q10. A. Compare the effectiveness of a current limiting circuit breaker with that of a HRC fuse.

B. A coil having a resistance of 10 Ohm, and an inductance of 0.15 H is connected in series with a capacitor across a 100V, 50Hz supply. If the current and the voltage are in phase what will be the value of the current in the circuit and the voltage drop across the coil?