DieselShip's Online Content Library

Q1. A. Sketch and describe a total flooding CO2 gas system suitable for the protection of machinery spaces; B. State, with reasons, which valve should be operated first in the system shown in (A).

Q1. Describe systematically, how a vessel which had a black-out on full ahead is restored to sull sea – steaming conditions.

Q1. With reference to the provision of a shore electrical supply to a ship:

A. Sketch an arrangement for taking A.C. shore supply and checks to be carried out prior taking shore connection?

B. Describe the method of safely connecting the arrangement sketched in (A) to the shore Supply?

Q5. With reference to mechanical/hydraulic governors explain:

A. Why flyweights are driven at a higher rotational speed than the engine;

B.  How dead band effects are reduced;

C.  How hunting is reduced;

D.  How the output torque is increased.

Q5. With reference to Boiler water tests carried out onboard:

A. Discuss the possible reasons for the following changes in boiler water test results, and state what actions should be taken in each case;

1. Reduction in total dissolved solids and chemical reserves.

2. Reduction in phosphate reserve, with increase in chlorides and total dissolved solids;

3. Reduction in alkalinity reserve only.

4. Increase in oxygen levels only.

B. State why the complete results of boiler water tests are logged or entered into a data retrieval system rather than a note being made of any particular result which may be outside set limits.

Q2. In the event of a failure of the main electrical power supply on a ship, an emergency source of power must be available.  State the circuits which must be fed from such a source and discuss the reasons governing the selection of such circuits.

Q5. With reference to electronic control systems A. Draw a simple block diagram for temperature control B. Describe each component shown in the diagram in (a).

Q1: A. Outline the procedure for the inspection of the rudder in a dry dock.

B. What are the requirement with respect to steeling gear as per SOLAS 74, as amended for the following:

i. Relief valve;

ii. Steering gear control;

iii. Electrical power circuits.

Q7. With reference to medium speed engine cylinder liners:

A. Explain the cause and effects of Polishing or glazing;

B. Describe, with the aid of sketches, an anti-polishing ring and how it is fitted in the liner;

C. Explain the action of anti-polishing ring during the operation of the engine.

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.

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.

Q6. A. Describe the events leading to a crankcase explosion.

B. State how overheating might be indicated other than by a mist detector.

C. Discuss the procedure to follow in the invent of overheating being indicated.

D. State how severity of a crankcase explosion is limited.

Q3. Diesel electric propulsion is now being chosen as the power plant for an increasingly wide variety of vessels.

(a) Sketch a simple layout of such an installation.

(b) Explain the advantages of selecting such a plant.

Q3. Discuss critically the following alternative types of main propelling machinery for installation in a proposed new ship - A. 2 stroke single acting cross head type slow speed engine; B. 4 stroke single–acting with reverses / reduction gear.

Q3. A. Explain the causes of the formation of mill scale on steel plate. Describe the preparation necessary before the application of conventional paints to the underwater surface of the hull; C. Describe a coating scheme for the underwater hull using conventional paints.

Q5. With reference to oil monitoring of bilge and tanker ballast discharges:

A. Describe with the aid of a sketch the general arrangement of an oil monitoring system;

B.  State the inputs that are recorded;

C. Explain the difficulties encountered with the efficient operation of the monitoring systems.

Q5. With reference to an emergency source of electrical power in cargo ships: -

A. Describe a typical power source.

B. Give a typical list of essential services, which must be supplied simultaneously;

C. Explain how the emergency installation can be periodically tested.

Q2. A). Describe the overhaul of a boiler safety valve and explain using sketches where necessary those parts which require particularly close attention;

B). Describe the setting of boiler safety valve to comply with classification society requirements.

With respect to control air supply system for Main Engine Control:

A. Define the essential conditions, which must be satisfied by the air supply for a pneumatic control system;

B. Sketch a control air supply arrangement and give a reasoned explanation for positioning of dryers and filters.

Q7. With reference to auxiliary boiler safety valve:

A. Describe, with aid of a Sketch the safety valves for an auxiliary boiler;

B. Identify, with reasons, the part that require particularly close attention during overhaul;

C. Describe how the safety valves are reset after an overhaul.

Q3. Explain the principle of port State control and give in detail the verification the Port State Control Officer may carry out with particular reference to the following;

A. Emergency generator; B. Auxiliary steering gear; C. Lifeboat engine; D. Bilge pumps; E. SOPEP.

Q5. Give a list of the properties or tests by which distillate and blended fuels may be specified or decisions be made on their fitness for use. Name the properties or constituents that nay be found in a blended fuel having a high viscosity and high carbon content, explain how they may cause problems in engine operation.

Q3. The direct online start of squirrel cage motor is used for most electrical drives on a.c. powered ships. Describe with sketches as necessary one method of overcoming each of the following Problems:

A. High starting current; B. Low starting torque.

Q5. Give a list of the properties or tests by which distillate and blended fuels may be specified or decisions be made on their fitness for use. Name the properties or constituents that may be found in a blended fuel having a high viscosity and high carbon content. Explain how they may cause problems in engine operation

Q1. A. Describe an automatic self de-sludging centrifuge suitable for dealing with fuel of density upto 1010 kg/m3 at 150C;

B. Explain how the centrifuge described in Q4 (a) is able to remove water from a fuel which has a density that is higher than that of water and state factors that may assist the operation.

C. As Second Engineer, write down the start-up procedure for the centrifuge described in Q1 (A) for the benefit of your staff;

D. State how is the problem of catalytic fines in fuel oil may be dealt with.

Q9. With reference to chemical tankers:

A. Sketch a suitable cargo pumping and stripping system, labelling the component parts and indicating the direction of fluid flow;

B.  State the requirements of the regulations involved to reduce pollution of the sea by chemical tanker cargoes.

Q4. With reference to steering gear hydraulic systems:

A. Explain the factors that could contribute to failure of connecting flange leading to total loss of oil from the system.

B. Describe an arrangement designed to ensure that the problem would not cause steering failure.

Q6. A. What are the characteristics of PN junction diode? Point out its specifications. Also point out the significance of dynamic and static resistances.

B. Draw the circuit of Half-wave rectifier and its output waveform. A diode whose internal resistance is 20 is to supply power to 1000 load from 110 V (RMS) source. Calculate

(i) peak load current, (ii) DC load current, (iii) AC load current.

Q4. A. Briefly describe the causes and effects of bacterial attack of lubricating oil.

B. Bacterial activity has been detected in the lubricating oil of the main engine fitted in the ship aboard which you are serving as 2ndeng. Write a letter to the owner/operator of the ship indicating the action you intent to take and offer suggestion to the avoidance of future incidents.

Q2. With reference to reciprocating air compressors explain why.

A. Clearance volume is critical to efficiency.

B. Spring-loaded plate valves are invariably used.

C. Compression is accomplished in apparently unequal stages.

D. Inter cooling is used between stages.

Q6. With respect to a heavy fuel oil system describe the instructions you will give to juniors regards. Bunkering arrangements with safety fittings provided. On-board oil purification system. Remote shut – off arrangements How environmental pollution is avoided? Temperature control arrangement; The use of the “Oil Record Book”.

Q7: A. Sketch and describe the high pressure cut out for a refrigeration unit; B. The refrigeration compressor has cut out due to operation of the h.p. cut-out.  State the possible causes.

Q10.  (a). Describe the no-load saturation characteristic of a d.c. generator.

(b). A 4-pole machine running at 1500 r.p.m. has an armature with 80 slots and 6 conductors per pole. The flux per pole is 6 x 106 lines. Determine the terminal e.m.f. of d.c. generator if the coils are lap connected. If the current per conductor is 100 A, determine the electrical power.

Q4. Misalignment of the main shafting between engine and propeller causes bearing overloads and shaft stress;

A. State the difficulties associated with checking shaft alignment and the reasons why results are unreliable due to external factors;

B. Explain with a simple sketch how a bearing load is assessed.

C. Explain how uneven loading could be rectified

Q9: A new vessel exhibits severe aft end vibration

A. As a Second Engineer Officer, outline a procedure to investigate and identify the source of vibration

B. Suggest possible remedies to obviate / reduce aft end vibration.

Q7. With reference to the SOLAS 1974/1978 Convention as amended, which outlines mandatory requirements for steering gear tests and drills?

A. Describe the test procedure to be carried out within the, 12 hours before departure on a sea-voyage;

B. Describe the emergency steering drills that must take place at least once every, 3 months;

C.  State how often the test in (A) and the drill in (B) should be carried out for ships which regularly engage on voyages of short duration.

Q8: With reference to cylinder valves, state how the following faults become apparent: Slackness of air inlet and exhaust valve spindles in their guides; Leaking starting air valve; Late opening of air inlet valve; State how each fault is corrected, and suggest how they could be avoided.

Q8. A. What is back emf? Derive the relation for the back emf and the supplied voltage in terms of armature resistance.

B. A three- phase induction motor is wound for four poles and is supplied from a 50 Hz system. Calculate.

i. The synchronous speed; (4)

ii. The speed of the rotor when the slip is 4 per cent; (3)

iii. The rotor frequency when the speed of the rotor is 600 r/min. (2)

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.

Q7. Describe the possible faults which may be found during a dry-dock inspection of the following; A. Stern frame; B. Sea chest; C. Bilge keel; D. Anodes; E. Rudders.

Q4. A rudder of a vessel requires extensive welding repairs and as second engineer you are requested to supervise. A. Suggest a suitable type of welding process; B. State, with reasons, FOUR common welding defects; C. State what tests may be carried out before returning the rudder to service.

Q8. A. Explain the principles underlying the STCW Convention; B. Explain how as a senior engineer you would implement the regulation for controlling and monitoring of minimum hours of rest for watch keepers; C. What type of specific shipboard familiarization is required to be given? D. List the areas in which training is required and areas it is desirable.

Q9. With reference to the adoption of unmanned machinery spaces, describe suitable automatic control and alarm systems to deal with - A. High bilge level; B. Fuel oil tank overflow; C. Bearings overheating; D. Fire direction. Comment on the method and frequency of testing the equipment and the energy supply source to ensure unfailing continuous operation.

Q8. (A) A set of indicator diagrams including draw cards has been taken for a main diesel engine, noted that compression curve is normal. Examine critically and give reasons for following observations.

i. The maximum pressure is lower;

ii. The maximum pressure is higher;

iii. The expansion curve is lower;

iv. The expansion curve is higher.

(B). Describe how the faults as mentioned above can be rectified

Q10. 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. A twelve-pole, three-phase, delta-connected alternator runs at 600 rev/min and supplies a balanced star-connected load. Each phase of the load is a coil of resistance 35 ohm and inductive reactance 25 ohm. The line terminal voltage of the alternator is 440V. Determine (a) frequency of supply, (b) current in each coil, (c) current in each phase of the alternator, (d) total power supplied to the load.