DieselShip's Online Content Library

Q1. The fire protection provided for the propulsion motor and generator of a diesel electric drive vessel is usually one of the following methods: A. Fixed foam extinguisher; B. Fixed CO 2 system; C. Steam smothering system; D. Dry Chemical Powder

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.

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. State FOUR operational conditions that may lead to vibration of the main transmission shafting; B. Suggest methods to reduce the vibration levels that may occur in the main transmission shafting.

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)

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.

Q1. 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.

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)

Q5. A. What limits the power in a cylinder of a given size? B. State the results if an attempt to raise the power by injecting more fuel into the cylinder is made

Q5. A. Sketch a four-ram steering gear arrangement capable of 100% redundancy; B. Describe the operation of the arrangement sketched in A.

Q8. A. Explain the use of KN curves. B. A ship of 12000 tonne displacement has a rudder 15m2 in area, whose centre is 5m below the waterline.  The metacentric height of the ship is 0.3m and the centre of buoyancy is 3.3m below the waterline.  When travelling at 20 knots the rudder is turned through 30 .  Find the initial angle of heel if the force Fn perpendicular to the plane of the rudder is given by: Fa=577 Av2 sin  N, Allow 20% for the race effect.

Q6. Explain the following terms/statements: -

A. Categories of Noxious liquid substance;

B. Special Areas as defined in MARPOL 73/78;

C. Double hull tanker;

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. Sketch and describe a cargo space inert gas system producing washed gas from either a main boiler or from an independent gas generator module. Elaborate the alarms and cut-outs incorporated in the system to prevent any accident.; Explain the various protections for cargo tanks with respect to pressure vacuum build up inside the tanks.

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.

Q10. A. Describe the relationship between frictional resistance and: (i)Ship speed; (ii) the wetted area; (iii) surface roughness; (iv) The length of the vessel.  B.A ship travels at 15 knots and has a QPC of 0.865 with a delivered power of 2600 KW. The apparent slip is 5% and the real ship is 28%Calculate the total resistance and the wake friction.

Q7. For an ISM certification, explain the key clauses, which are required to be complied with obtaining Interim DOC, State the responsibility of a Second Engineer with respect to satisfactory implementation of SMS on board ship.

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.

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?

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.

Q8. With reference to Port State Control: A. State the various MOU’s and the purpose of having a port state control regime; B. Give at least 3 examples of deficiency which may lead to detention of your vessel; C. If your vessel gets detained by the PSCO owing to a deficiency, what woul be your action for redressal.

Q6. A. Describe how water tightness is maintained where bulkheads are pierced by longitudinal beams or pipes.

B. A triangular bulkhead is 7 m wide at the top and has a vertical depth of 8 m.  Calculate the load on the bulkhead and the position of centre of pressure if the bulkhead is flooded with sea water on only side:

(i) to the top edge,               (ii) with 4 m head to the top edge.

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. Sketch a simple cross section through a single stage centrifugal pump with a fully shrouded single entry impeller, name the components of the pump and indicate the direction of fluid flow. B.  Describe: - i. The function of the impeller and how suction is created by it; ii. The function of the volute casing. iii. State the material of each component of the pump. C. State the suction lift that may be expected.; D. State why some centrifugal pumps have: - A double volute casing; (ii) A diffuser ring

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.

Q4. A. Describe a method of the attachment of bilge keels;

B. State THREE reasons for not extending bilge keels the entire length of the vessel;

C. Evaluate the effectiveness of bilge keels for large wall sided vessels;

D. Explain TWO principles of roll damping those bilge keels exploit.

Q9. Write reference to gravity life boat davits; state the purpose of the following:

A. Centrifugal brake, B. Dead man’s handle; C. Davit limit switch.

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.

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

Q6. With reference to Liquefied Natural Gas Carriers (LNG), explain the inspection you will carry out on the following equipment’s - A. LNG Vaporizer; B. Re-gasification plant; C. Cargo pumps; D. Emergency discharge pumps.

Q3: With reference to dry docking, define the responsibility of the second engineer;

A. Prior to docking;

B. Whilst the vessel is in dry dock;

C. Prior to flooding and leaving the dock.

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?

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.

Q5. A. Explain why it is essential to ensure adequate cooling of air compressor cylinders, inter coolers and after coolers; B. State with reasons the possible consequences of prolonged operation of the compressor if these areas are not adequately cooled.

Q1. With reference to International Load Line Statutory Certification,

A. State the reasons for the freeboard requirements;

B. (i) Explain the term “conditions of assignments”;

(ii) List the items that may be examined during a Load line survey after a vessel’s major repairs in the dry-dock.

Q8. Describe the hull inspection that you would carry out in the dry dock stating what inspection you would make as the work started during and after completion of work of the following RUDDER Inspection of large seawater inlet chest and valve, A. Anchor cables; B. Forward end of ship; C. Propeller and stem bush; D. Opening in shell plating; E. Shell plating.

Q8. Explain in detail the main engine problem that may arise due to fuel catalytic fines and the best shipboard practice that may be adopted to combat the problem.

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.

Q9. Sketch and describe an auxiliary boiler safety valve; Explain which areas of the valve described above, require particularly close attention during overhaul; Describe how the valves are set after overhaul.

Q2. State how and why the following machinery items are effected when the maximum service speed of a Vessel is consistently maintained in heavy weather.

A. Intermediate shafting,

B. Propeller shafting,

C. Shafting coupling bolts,

D. Main thrust pads.

Q9: With reference to sleeved keyless propeller assemblies: A. (i) State, with reasons, the metals used in the manufacture of the sleeve and tail end shaft; (ii)State the type and thickness of material used to bond the sleeve to the propeller boss. B. When removing the propeller from the tail end shaft, state why the following procedures are not recommended: (i) Application of push off force by means of wedges or jacks and draw off force by strong back; (ii) Expansion of propeller boss by concentrated local heating with gas torches. C.  State the correct procedure for the removal of the propeller from tail end shaft

Q2. A. Describe the arrangement made in a main structural bulkhead for a watertight door aperture; B. Explain a procedure for ensuring that sliding watertight doors are operated safely. C. Differentiate between the categories of watertight door and state the regulation pertaining each type.