DieselShip's Online Content Library

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. A. With reference to the underwater surface of a ship’s hull; i. Describe a hull plate roughness analyser system;

ii. State the significance of the roughness profile and compare the typical roughness values for a new ship and a ship eight years old;

B. Which reference to the application of self-polishing paint in dry dock - i. Describe the plate preparation necessary;

ii. State the defects that may occur in the paint coating if it is not correctly applied.

Q1. Suggest a procedure (in about 200 words) to the Chief Engineer, as to how you propose to ensure that the engine room overhead crane is maintained and operated correctly.  What tests certificates are required for the overhead crane, and who is the issuing authority.

Q3. Differentiate between squirrel cage and wound rotor motor of the three phases: a.c. induction. In respect of the following; A. Rotor construction, B. Torque characteristic, C. Speed variation.

Q1. Describe how each of the following procedure may be accomplished by bridge control equipment for a direct reversing 2 stroke diesel engines - Setting the direction of rotation; Starting; Controlling speed

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.

Q1. With reference to membrane tanks for the carriage of liquefied gas at very low temperatures. A. Describe with a sketch one method of building up the insulation; B. State which alloy is used for the membrane and the reason; C. Describe with the aid of a sketch, how the tanks are located and supported. i) Longitudinally; ii) Transversely

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.

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.

Q6. A. Describe the survey procedure of an oil lubricated stern bearing and shaft. (8)

B. Explain how the integrity of the outboard seal of an oil lubricated stern tube may be proved before the dry-dock is flooded. (8)

Q7. With reference to auxiliary diesel engines, suggest probable causes that would create EACH of the following conditions and state how they would be rectified: A. Knocking; B. Loss of power; C, Loss of lubricating oil pressure

Q3. With respect to the properties of fuel oil, explain the significance of the following terms.

(a) Calculated Carbon Aromaticity Inbox (CCAI).

(b) Open flash point and Closed flash point.

(c) The importance of Sodium to Vanadium Ratio.

(d) Octane Number.

Q3. With reference to large starting air receivers:

A. Explain where corrosion is likely to occur and state why it occurs in these regions. (4)

B. State the how the incidence of corrosion in air receivers might be minimized. (4)

C. If serious corrosion is detected in a starting air receiver and that receiver must be used explain how you, as Second Engineer, would determine the maximum pressure to which the receiver should be subjected. (4)

D. State the further action a Second engineer must take upon discovering such air receiver corrosion. (4)

Q4. Describe a forced ventilation system for the machinery spaces and a natural ventilation system for a lower hold. Why hold ventilation is considered necessary?

Q7. With reference to “ISM Code” write short notes on;

A. Masters Review; Master overriding authority.

B. Management Review;

C. Designated Person Ashore (DPA)

D. Functional requirements for a Safety Management System.

Q7. Fatigue is one of the main causes of crankshaft failure - A. Indicate on a sketch the most likely location of a fatigue crack; B. Explain how a fatigue failure is identified; C. Describe how a fatigue crack may be initiated; D. Describe, with the aid of sketches, the methods used to inhibit fatigue cracks.

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.

Q1. With regard to care of lubricating oils onboard, answer the following:

(a)  Microbial degradation of lubricating oil and measures to prevent the same

(b)  Methods of ensuring correct sampling is done for the purpose of shore based testing.

(c)  If the shore based testing results show an abnormal values of water content and TBN for the crank case lub oil of a slow speed main engine, what will be interpretation and subsequent action?

Q7. With respect to trim and stability, describe the following - A. Effects on centre of gravity of slack tanks; B. Effect on stability of ice formation on superstructure; C. Effects of wind and waves on ship’s stability; D. Effect of water absorption by deck cargo and retention of water on deck.

Q7. With reference to entry into enclosed spaces onboard:

A. Define “Enclosed space” and give example of enclosed spaces onboard.

B. Describe the procedure for testing the atmosphere inside such enclosed spaces.

C. Explain safety precautions taken prior to entry into enclosed spaces onboard vessel.

Q4. An auxiliary engine exhibits a tendency to hunt to such an extent that the engine speed variation prohibits the connection of the machine to the switchboard. A. Discuss the possible causes of hunting; B. Explain how the problem of hunting can be rectified.

Q4. A. (i) Discuss the various hazards and problems which are associated with electric cable Insulation in the event of fire.

(ii) Suggest remedies for these problems.

B. State how the spread of fire may be reduced by the method used for installing electric cables.

Q5. With reference to the crankshaft and running gear of an engine, explain static balance, Dynamic balance, Torque reaction couple, and Critical speed

Q1. As second engineer onboard a tanker, describe the procedure for presenting a Main Boiler for survey by a classification society?

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.

Q4. With reference to the prevention of hull corrosion discusses:

A. Surface preparation and painting of new ship plates.

B. Design of the ships structure and its maintenance. C. Catholic protection by sacrificial anodes, of the internal and external areas of the ship.

Q8. For a fully automatic provisions refrigeration system incorporating a number of rooms; A. Explain how each room temperature is set;  B. Describe the sequence of events following a demand for increased refrigerant flow from one room;  C. State with reasons the devices incorporated into the system to protect the machinery and equipment against malfunction;  D. State how satisfactory operation of the plant can be established?

Q5. A. What are the causes of overheating of an induction motor?

B. What preventive measures are provided against damage to an induction motor in installed condition? C. What is the purpose of ‘fuse back up protection’ provided to an induction motor? D. How does an induction motor develop torque?

E. What is the condition to be satisfied for achieving maximum running torque in an induction motor?

Q8. (a) Describe, with the aid of a sketch, the main engine auxiliary equipment for automatic monitoring and regulation of the fuel viscosity.

(b) Explain the operation of the system, which incorporates the equipment described in Q.8(a).

(c) For an engine which is maneuvered on distillate fuel but operated on heavy residual oil at sea, static, as second engineer, the standing orders you would issue for the procedure to be adopted when changing form distillate fuel to heavy residual oil and vice versa.

Q6. With regards to main transmission shaft flange coupling arrangements:

A. Sketch a hollow type coupling bolt and the hydraulic head/nut and loading rod which are used to fit it.

B. Describe how the bolt is fitted.

C. State the advantage of the hollow coupling bolt as compared to the traditional type of coupling bolt.

Q6. a) Describe how the distribution of mass within the ship affects the rolling period. (6)

b) The righting moments of a ship at angles of heel of 0, 15°, 30°, 45°, and 60° are 0, 1690, 5430, 9360 and 9140 kN-m respectively. Calculate the dynamical stability at 60°. (10)

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. Write short notes on the following; A. Measures to stop exhaust gas leakage in the engine room; B. Measures to stop oil leakages in the engine room.

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.

Q9. With reference to timing chains:

A. State the cause of chain elongation in service, using a sketch of a section of a camshaft roller chain to illustrate your answer;

B. State: i. The effects of increased chain length:

ii. The method of assessing percentage increase in length:

C. Explain how the effects of elongation are corrected:

D. State why a limit is placed on percentage chain elongation and give typical example.

Q5. Sketch and describe the operation of a four ram electro-hydraulic steering gear system. Indicate and explain the valve positions for the operation of the system when one pump is isolated, and the unit is operating on two rams only.

Q7. a) Describe briefly the significance of the factor of subdivision. (6)

b) A ship 120m long has a light displacement of 4000 tonne and LCG in this condition 2.5m aft of midships.  (10)

The following items are then added:

Cargo    10000 tonne      LCG 3.0 m          forward of midships

Fuel      1500 tonne        LCG 2.0 m          aft of midships

Water    400 tonne          LCG 8.0 m          aft of midships

Stores   100 tonne          LCG 10.0m         forward of midships

Using the following hydrostatic data, calculate the final draughts:

Q1. A. Describe with the aid of a sketch, the arrangement of exhaust and air inlet passages in a medium speed four stroke engine cylinder head. B. With reference to [a] indicate where cracking might be expected stating the likely cause.  C. Explain the different factors that tend to cause distortion of 4stroke cylinder head. D. Explain how the effects described in [c] are minimized.

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.

Q5. With reference to air receivers and bottles explain with reasons: A. Why regular systematic internal inspection is advisable? B. Which internal areas of large receivers should receive particularly close examination? C. How bottles are inspected internally and what parts should be closely examined? D. How the condition of a bottle or receiver that cannot be inspected internally is checked?

Q7. A. Describe the no-load saturation characteristic of a d.c. generator.

B. A d.c. motor takes an armature current of 110 A at 480 V. The resistance of the armature circuit is 0.2 . The machine has six poles and the armature is lap-connected with 864 conductors. The flux per pole is 0.05 Wb. Calculate;

(i) The speed;

(ii) The gross torque developed by the armature.

Q9. With reference to Vacuum Sewage System

(a) Sketch & Describe a Vacuum Sewage System.

(b) State the advantages of Vacuum Sewage System.

(c) State the different causes of dropping vacuum.

Q8. A. Explain the effect of trim on tank soundings. B.A ship of 6600 tonne displacement has KG 3.6m and KM 4.3m. A mass of 50 tonne is now lifted from the quay by one of the ship’s derricks whose head is 18m above the keel. The ship heels to a maximum of 9.5° while the mass is being transferred. Calculate the outreach of the derrick from the ship’s centreline.

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

Q6. Describe the hull inspection that you would carry out as the senior engineer of ship in dry dock stating what defects you may find and the repairs that may be necessary with respect to;

A. Shell plating; B. Forward end of ship; C. Aft end of ship; D. Opening in shell plating; E. Rudder; F. Propeller and stern tube;

Q8. A. What is a commutator? Discuss its rectifying action in detail.

B. Calculate the e.m.f. generated by a 4-pole, wave wound armature having 40 slots with 18 conductors per slot when driven at 1000 r.p.m. The flux per pole is 0.015 wb.

Q5. A. Describe briefly the operation of an electrical or hydraulic main engine governor B.  For the type described indicate how failure can occur and the action to be taken if immediate correction cannot be achieved and the engine must be operated.

Q8. Detail the desirable properties of a refrigerant. Make a table and compare following refrigerants for use in a provision cooling plant for a 50000 DWT Oil tanker: R-22, R-134a.

Q9. Briefly discuss the following with respect to safety of navigation:

A. Bridge Navigation Watchkeeping Alarm System (BNWAS) (5)

B. Long Range Identification and Tracking of ships (LRIT) (5)

C. Voyage Simplified Voyage Recorder (VDR/S-VDR) (5)

d. NAVTEX (5)

Q9. a) Describe, with the aid of a sketch, a main engine cylinder relief valve. (10)

b) List the conditions, which may cause the valves, sketched in (a) to lift. (6)

Q9. A. Explain the effect on GM during the filing of a double – bottom tank, B. A ship of 8,000 tonnes displacement has KM 7.5m, and KG 7.0m.  A double bottom tank is 12 meters long 15 meters wide and 1 meter deep.  The tank is divided longitudinally at the centre line and both sides are full or small water. Calculate the list if one side is pumped on until it is half empty.

Q4. With reference to Auxiliary boiler safety valves;

A. Describe with the aid of Sketch the safety valve for an auxiliary boiler;

B. Identify with reasons. The parts that require particularly close attention during overhaul;

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

Q9. A. Discuss different methods of speed control of a d.c. series motor by adjusting field ampere turns.

B. A 230 V, d.c. shunt motor runs at 1000 r.p.m and takes 5 amperes. The armature resistance of the motor is 0.025𝛀 and shunt field resistance is 230𝛀. Calculate the drop in speed when the motor is loaded and takes the line current of 41 amperes. Neglect armature reaction.

Q4. Sketch a sealing arrangement for an oil lubricated stern tube.

a) Identify the common forms of seal failure. (6)

b) State how oil loss due to seal failure can be restricted whilst on passage. (5)

c) What is the material used for sealing rings and propeller shaft liner? (5)

Q8. A ship of 9,900 tonnes displacement has KM=7.3 m and KG=6.4 m she has yet to load two 50 tonne lifts with her own gear and the first lift is to be placed on deck on the inshore side (KG 9 m and center of gravity 6m out from the center line). When the derrick plumbs the quay its head is 15m above the keel an 12m out from the center line.

Calculate the maximum list during operation.

Q10. A. Why is a synchronous motor not self-starting? What are the various ways in which it can be started?

B. A 500V, single phase synchronous motor gives a net output mechanical power of 7.46kW and operates at 0.9 power factor lagging. Its effective resistance is 0.8 . If the iron and friction losses are 500 w and excitation losses are 800w, calculate the armature current and the commercial efficiency.