DieselShip's Online Content Library

Q1: With reference to an emergency fire pump state –  A. The regulation that influence its location, capacity and power; B. How the power supply to emergency pump is ensured? C. Why a relief valve is necessary on the deck main?

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.

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.

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.

Q1. A. Describe clearly how you would deal with a fire in the scavenge space of a marine diesel engine; Explain the cause of such fires and state the measures which can be taken to limit their occurrence?

Q2. Sketch a high-lift safety-valve lid and seat detailing their special features. Describe how such a valve is overhauled and any clearance that should be measured and noted. (16)

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

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); C. State the requirements that determine the amount of gas carried in a C02 firefighting 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.

Q2. A. State with reasons the main causes of normal cylinder liner wear; B. State TWO forms of abnormal liner wear, explaining how EACH may be caused; C. Explain how cylinder liner wear may be kept within acceptable limit

Q4. A. Describe with the aid of sketches where necessary a vane type steering gear showing how to weight of the rudder and stock are carried and the arrangement that allow for wear down;

B. State how the vanes described in (A) are secured and the method of sealing the edges;

C. State how, if necessary, the steering gear is locked for rudder maintenance.

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.

Q3. What is understood by green ship? Describe its salient features.

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.

Q4. Give reasoned opinion as to the validity of the following - Hydraulic operation of fuel injectors are to be referred to mechanical operation; Combustion conditions within the cylinder are a good indication of injector condition; Inadequate fuel filtration is the principle cause of injector malfunction.

Q3. What do you understand by ‘safematic steering gear’ and how does it work?

Q4. A. Explain the causes of the formation of mill scale on steel plate. B. 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

Q6. A. Describe a vacuum sewage system;

B. With reference to the system described in (A) - i. State ONE advantage of the system;

ii. State why a holding tank may be required to be fitted to the system;

iii. State the problems resulting from the retention of untreated sewage in a holding tank.

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?

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. Sketch and describe a turbocharger bearing lubrication system. State the type of bearing employed and explain the advantages and disadvantages of the lubricating system described.

Q9. With reference to fatigue of engineering components:

A. Explain the influence of stress level at cyclical frequency on expected operating life.

B. Explain the influence of material defects on the safe operating life of engineering component.

C. State the factors which influence the possibility of fatigue cracking of an auxiliary boiler feed water pump shaft and explain how the risk of such cracking can be minimized.

Q5. Receiving of bunkers is an important aspect of a Senior Engineers responsibility, A. State the safety precautions that should be observed when bunkering; B. Explain the importance of taking samples when bunkering; C. Explain a preferred method of taking samples; D. Slate the details available in bunker delivery note BDN); E. State the effect of EACH of the following in a fuel oil - High density; High pour point; High water content.

Q5. A palm of the rudder of a vessel requires extensive welding repairs and as a Chief Engineer you are requested to supervise –

A. Suggest a suitable type of welding process;

B. State with reasons FOUR common welding defects that can occur there;

C. State what tests may be carried out before returning the rudder to service.

Q4. A. Explain how the efficiency and regulation of a transformer can be assessed by open circuit and short circuit tests?

B. What is meant by equivalent resistance?

Q6. Under Continuous survey of machinery (CSM) bottom end bearing of a large 2stroke slow speed engine is due for survey.

A. As second engineer, explain the procedure involved in complete inspection of a bottom end bearing.

B. List the precaution to be taken.

C. Indicate the reasons for possible defects which could be encountered and state how they may be rectified.

D. What test are carried out on completion of survey and re-assembly.

Q6. With respect to tankers describes: - (16)

A. How a pump room is ventilated?

B. How cargo tanks are ventilated?

C. Cargo tank protection as per SOLAS 1974.

D. Additional alarms provided for inert gas systems of the ‘inert gas generator’ type.

Q2. As a second engineer of a vessel, you are instructed to submit to the superintendent engineer a complete indicator cards together with relevant data. Give full account of your work in taking the cards and preparing them for submission. Tabulate the data you forward, both that extracted from the cards and otherwise obtained, giving typical figures taken from a motor ship.

Q6. A. Explain the term angle of loll and state what, if any dangers it poses to a vessel. B. A ship whose length is 110 m has MCTI cm 55 tonne m: TCP9; LCF 1.5 m forward of midships and floats at draughts of 4.20m forward and 4.45m aft. Calculate the new draughts after the following masses have been added, 20 tonne 40 m aft of midships; 50 tonne 23 m aft of midships; 30 tonne 02 m aft of midships; 70 tonne 06 m forward of midships; 15 tonne 30 m forward of midships;

Q6. With respect to MARPOL 73/78, Annex - II, Noxious liquid chemicals are divided into categories; A. State the number of categories, and what does each category signify. B. State the requirement of Procedures and Arrangements Manual, and what information is available.

Q6. A. State the circumstances owing to which it may be necessary to renew a cylinder liner.

B. Explain how the liner is removed

C. Explain how the new liner is fitted; State the important checks to be made before and after fitting.

Q6. (a). Explain the significance of the root- mean- square value of an alternating current or voltage waveform; Define the form factor of such a wave form.

(b). A total load of 8000 kW at 0.8 power factor is supplied by two alternators in parallel. One alternator supplies 6000 kW at 0.9 power factor. Find the kVA rating of the other alternator and the power factor.

Q3. Recent experience has shown persistence damage occurring on seating faces of main engine exhaust valve, which is not confined to any particular unit; (a) State with reason the possible causes; (b) State the short-term action to be taken in order to minimize engine operational problem; (c) State with reason how future incident of this nature could be minimized

Q3. A. Sketch and describe TWO methods that employ manometric means for measuring tank contents. (6)

B. State what corrections are made to the readings obtained by the methods described in (A) in order to gauge the mass contents? (5)

C. Explain how bunkering requirements may be estimated when no records of main engine fuel consumption are available on board. (5)

Q2. With reference to classification society’s survey, explain the following

A. Why a Class certificate is issued to a newly built ship after satisfactory completion of survey and sea trials, what is the purpose of a Class certificate?

B. Is it necessary to call a Class surveyor after repair or alteration to the ship’s structure If so, why?

C. Describe the requirement for initial and periodical survey respect to International Load Line.

Q7. A. Explain what is meant by ‘assigned summer free board’. B. A ship 120m long has draughts of 6.6m forward and 6.9 aft. The TPC is 20, MCTI cm 101 tonne m and the centre of flotation 3.5m aft of midships. Calculate the maximum position aft at which 240 tonne may be added so that the after draught does not exceed 7.2m

Q7. Describe the procedure to be undertaken when, upon a routine schedule for changing fuel injectors on a main engine, It is found that the injector body is seized and cannot be removed by conventional means. How to ascertain whether the cylinder head injector can be used satisfactorily.

Q7. A. By means of a schematic circuit diagram illustrate the peak rectifier. If the supply voltage is v(t) = Vm Sin wt, what is the voltage across the load resistor?

B. A battery-charging circuit is shown below in Fig. The forward resistance of the diode can be considered negligible and the reverse resistance infinite. The internal resistance of the battery is negligible. Calculate the necessary value of the variable resistance R so that the battery charging current is 1.0 A.

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.

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.

Q1. A. Explain the purpose of the rudder carrier and pintles.

B. 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.

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. 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.

Q8. Explain how EACH of the following hull defects should be dealt with;

(a) A cracked weld;

(b) A severe indentation in way of a frame;

(c) Surfaces suffering from general corrosion although the extent of wastage does not warrant plate replacement;

(d) A bilge keel fractured at the forward end.

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

Q8. With reference to oil/water separators:

A. Describe with the aid of a sketch, the working of such a separator. (6)

B. Explain the consequence if the interface detector position is incorrect. (5)

C. Enumerate the various possibilities by which oil / water interface can be moved. (6)

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. A) Describe the effect of cavitations on the propeller blades. (6)

B) A propeller 4.6m diameter has a pitch of 4.3m and boss diameter of 0.75 m. The real slip is 28% at 95 rev/min. Calculate the speed of advance, thrust and thrust power.  (10)

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. A. State the advantages of using steam turbine propulsion power for vessels carrying LNG cargo. B. With regard to the use of L.N.G. cargo as boiler fuel explain: (i)The safety precautions relating to the gas pipeline supplying the boiler and burning the gas in the boiler, (ii) The means of getting rid of “excess gases” during loading or discharge.

Q2. Sketch a Main Engine air starting distributor and describe how it operates.

List the safety devices and interlocks incorporated in main engine air starting system and state the purpose of each.

Q10. A) Describe the stability requirements of a ship for dry-docking. (6)

B) A ship 130m long displaces 14000 tonne when floating at draughts of 7.5m forward and 8.10m aft. GML – 125m, TPC – 18, LCF-3m aft of midships. Calculate the final draughts when a mass of 180 tonne lying 40m aft of midships is removed from the ship. (10)

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.