DieselShip's Online Content Library

Q1. Explain the following terms/statement:

A. SEEMP.

B. Special Areas as defines in MARPOL 73/78.

C. EEDI

D.EEOI

Q1. Draw and describe the construction of a forepeak tank. Explain how are the effects of panting and pounding taken care with help of neat sketches?

Q1. With reference to squirrel cage, induction, electric motors:

A. Describe the construction of such a motor.

B. Sketch the torque against speed curve of such a motor;

C. Describe a method employed by a retrofitted device used to improve the part load

performance of an induction motor.

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.

Q1. With reference to a particular make of main propulsion unit, describe how the engine is reversed manually and discuss the problems involved and the safety precautions which would be required if the control were operated remote from the machinery space.

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?

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?

Q6. With reference to an automatic water sprinkler, fire detecting alarm and extinguishing system for accommodation spaces: -

A. (i) Sketch a typical system;

(ii) Describe the operation of this system;

B. State the sources of water available;

C. Describe the sprinkler head and its operation;

D. State how the temperature rating of the sprinkler head is determined.

Q2. Sketch and describe an arrangement for automatic connection of emergency batteries upon loss of main power. Include in your answer:

A. Means of obtaining D.C. charging supply from a.c. mains;

B. A method of maintaining charge on lead acid batteries;

C. The arrangement to check that a battery operates a loss of main power

D. The length of time for which emergency batteries of passenger and cargo ships must provide power.

Q8. With respect to hydraulic Ram steering gears;

A. What emergency locking device can be used in order to speedily bring the steering gear to rest? State one reason the best angular position to lock the steering gear.

B. Use a simple sketch to show where the “Jumping” (top) and wear down (bottom) rudder carrier ring clearances can be measured. Indicate what clearances you would expect with a new steering gear;

C. State the consequences of the wear down clearances being reduced to less than Zero.

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.

Q2. State with reasons, how cracking in EACH of the following location is caused, rectified and avoided

a. “A”-frame.    b. Bedplate longitudinal girder.            c. Bed plate transverse girder.

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.

Q3. A. Explain what is meant by permissible length of compartments in passenger ships;

B. Describe how the position of bulkheads is determined.

C. Describe briefly the significance of the factor of subdivision.

Q3. A) Describe the circuit breaker for an a.c. generator using a sketch to show how arcing is Controlled.

(B)Explain the sequence of events that might occur if the breaker opens on a short circuit and state the check you would require following such event;

(C) Give a safe procedure to follow should a main circuit breaker fail to open under fault Condition.

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?

Q3. As second engineer you have been requested to obtain a set of indicator card from the large slow speed engine of a recently purchased second hand ship.

A. Describe your initial checks and preparations;

B. State with reason the types of card you would consider necessary and explain the procedure for obtaining these;

C. State in order of importance the additional information required with the card;

D. State your procedure for analysis of the cards and obtaining cylinder powers.

Q3. Damage has occurred to the main engine valves and the fuel supplied at a particular port is suspected. The owner’s case, however, in the subsequent dispute may be weak because the fuel was ordered specifying only type and viscosity.

A. Apart from fuel specification, describe how you, as Second Engineer, should have assisted the owners’ case when receiving the suspect fuel.

B. Describe the ISO fuel standard that is to be used when ordering bunker fuel.

C. Explain how the correct fuel standard is selected.

D. Suggest, with reasons, why particular mention should be made of certain elements that might not be included in the fuel standard.

Q4. A. Define the purpose of cofferdams,

B. State where cofferdams are most likely to be found on:

(i) Dry cargo ships;

(ii) Oil tankers.

C. (i) State what information is available about danger of entering void spaces.

(ii) Identify, with reasons, the precaution to be observed before and during entry to cofferdams.

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.

Q4. Accidents regularly occur due to premature or accidental release of CO2 into machinery spaces. With reference to this, enumerate the procedure or arrangement that you as second engineer would adopt with respect of the following

A.  Contractors working on CO2 system;

B. Understanding between bridge and engine room in the event of a machinery space fire;

C. Familiarizing staff with the system;

D. Checks and tests are carried out before putting system in operation?

Q2. With reference to U.M.S. operations:

A. State with reasons the essential requirements for unattended machinery spaces;

B. As second Engineer, describe how you would respond to the irretrievable failure of the Machinery space fire alarm system whilst the ship is on voyage.

Q4. Make a diagrammatic sketch of an engine cooling water system as applied to a medium speed diesel engine as fitted on a fishing vessel. Indicate the temperature and pressures. Describe the flow of water from entry to the engine to out let from the engine.

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.

Q4. With reference to Underwater Inspection in lieu of Dry  docking (UWILD)

A. Explain in detail, how an underwater survey is carried out;

B. State the requirements to be fulfilled before an underwater survey is acceptable to the survey authority.

C. Construct a list of the items in order of importance that the underwater survey authority should include.

Q4. Give a pragmatic approach to dealing with a sea water leakage, which is flooding the engine room and which has the potential of causing a serious impairment to a vessels stability.

Q1. (a) With reference to the insulation testing of marine electrical plant:

(i). State the reason for insulation testing:

(ii). State the precautions to be observed when testing intrinsically safe equipment

(iii). Explain the procedure for insulation testing of 440 V motor.

(b). Describe the overhaul of a D.C. motor which has been subject to excessively damp condition or flooding with seawater.

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.

Q2. A. Sketch and describe a control system for maneuvering a main diesel engine from the bridge

B.  Explain how local control may be effected in case of breakdown of the control system described in 2 (A).

Q8. A. Explain the action of EACH of the following metallurgical mechanism:

(i) Creep;          (ii) Brinelling;   (iii) Fretting;     (iv) Fretting corrosion;

B .State, with reasons, where EACH of the mechanisms in occur in ship propulsion System.

Q6. With reference to a bank of emergency lead acid batteries:

A.  State the conditions of the battery bank if the specific gravity of a number of cells in the bank is in the region of 1.11 with an ambient temperature of 160Celcius;

B. Describe a systematic procedure for checking the conditions of the battery bank if it is divided into section for charging;

C. Describe the necessary routine maintenance;

D. Describe how capacity test carried out on bank of Batteries.

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.

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.

Q6: With reference to Turbo-Chargers;

A. Explain why when surging occurs, the speed off the turbocharger is seen to change slightly;

B. Give examples of defects likely to result in surging;

C. Explain in simple terms what occurs in a turbocharger and the diesel engine as the speed / power increases. Based on the explanation what is meant by matching of T/C with an engine?

D. State the advantage of fitting uncooled turbochargers.

Q6. Sketch and describe a “fail safe steering gear” suitable for use on a tanker of more than 100,000 T dwt; Explain the sequence of events that take place when an oil leak takes place in one of the hydraulic pipe lines.

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. 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.

Q7. With reference to lifeboats, Sketch and describe:

A.  The handbrake used for lowering and state how it may be tested.

B. The centrifugal brake and method of testing.

C. A roller ratchet and the method of testing;

D. Why is ratchet incorporated into the system;

Q10. A.  Explain the preference for a 60 Hz system. Describe the dangers of running a 50 Hz system from a 60 Hz supply.

B. A ring-main, 900m long, is supplied at a point A at a p.d. of 220V. At a point B, 240m from A, a load of 45A is drawn from the main, and at a point C, 580m from A, measured in the some direction, a load of 78A is taken from the main. If the resistance of the main (lead and return) is 0.25 ohm per kilometre, calculate the current which will flow in each direction round the main from the supply point A and the potential difference across the main, at the load where it is lowest.

Q2. A. Explain the term Variable Injection Timing (VIT) when applied to fuel pumps and state why a change in timing of fuel injection may be required.;

B. Describe, with the aid of sketches a VIT fuel pump and explain how the change in timing is achieved whilst the pump is in operation

C. Explain how it may be determined that individual fuel pumps are injecting the correct quantity of fuel with the correct timing at a particular pump setting.

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

A. Bridge Navigation Watchkeeping Alarm System (BNWAS)

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

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

Q8. A ship 100 m long floats at a draught of 6 m and in this condition the immersed cross-sectional areas and water plane areas are as given below. The equivalent base area (Ab) is required because of the fineness of the bottom shell.

.

Calculate EACH of the following:

(a) The equivalent base area value Ab;

(b) The longitudinal position of the center of buoyancy from midships;

(c) The vertical position of the center of buoyancy above the base.

Q8. A). Describe the procedure to be undertaken when, upon a routine schedule for changing fuel injector on a main engine, it is found that the injector body is seized and cannot be removed by conventional means.

B). Briefly explain the routine tests that are carried out on main engine fuel injectors.

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.

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 Respect to Container Ship: -

A. Sketch a ship’s indirect refrigeration system arranged for cooling containers stowed in stacks in the hold;

B. Describe the refrigeration system sketched in (A);

C. State the advantages of the system described in (A) compared with containers with their own refrigeration self-contained units.

Q1. As Second Engineer of a new ship,

A. Prepare standing orders for all future bunkering operations onboard;

B. State why it is very important to obtain a representative sample of heavy fuel bunkers taken.

C. State how a representative sample is obtained;

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)

Q9. A. Explain how the efficiency and regulation of a transformer can be assessed by open circuit and short circuit tests?

B. A 25 kVa signal phase transformer 2200:200V has a primary and secondary resistance of 1Ω and 0.01 Ω respectively. Find the equivalent secondary resistance and full load efficiency at 0.8pf lagging, if the iron losses of the transformer are 80% of the full load copper losses.

Q9. While carrying out ship’s hull inspection, describe the various defects and corresponding repairs that might be expected in shell plating, Ford end of ship, aft end of ship, openings in shell plating, Rudder, Propeller, and stern tube.

Q9. With reference to crankshafts, explain EACH of the following:

A. The cause and effects of torsional vibration;

B. The term critical speed indicating why it can be a problem;

C. The term fatigue cracking and state, with reasons, TWO factors of crankshaft operation which have greatest influence on the likelihood of fatigue cracking

D. How a torsional vibration damper can reduce the effects of torsional vibration

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. What is meant by the Admiralty Coefficient and the Fuel Coefficient?

B. A slip of 14900 tonne displacement has a shaft power of 4460 Kw at 14.55 knots. The shaft power is reduced to 4120 kW and the fuel consumption at the same displacement is 541 kg/h. Calculate the fuel coefficient for the ship.

Q6. A. Explain distribution factor and pitch factor for alternator windings.

B. A 3phase, 4pole 24 slot alternator has its armature coils short pitched by one slot. Find the distribution factor and pitch factor.