DieselShip's Online Content Library

Q1. Name various Statutory Certificates and Documents to be carried on board container ships giving reference to the conventions and justify for their requirement. (20)

Q1. a) Describe a method of the attachment of bilge keels; (6)

b) State THREE reasons for not extending bilge keels the entire length of the vessel; (6)

c) Explain TWO principles of roll damping those bilge keels exploit. (4)

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. With regard to the main turbine lubrication oil system:

a) (i) Describe the effects of tin oxide corrosion; (5)

(ii) Explain the actions to be taken if this occurs in a high-pressure turbine thrust bearing. (5)

b) Discuss the factors that determine the various filtration sizes: (6)

Q2. Describe in detail each of the following processes and give an example where each is likely to occur in marine engineering: State how in each case the initiation of the process is prevented or minimized. A. Corrosion fatigue; B. Stress corrosion; C. Creeping cracks; D. Casting cracks

Q8. How are large slow speed engines structured to withstand the following forces?

A. Forces due to combustion load;

B. Guide forces;

C. Inertia forces.

Q2. a) What is the purpose of watertight doors fitted on bulkheads? (4)

b) Name the locations of watertight door in a vessel. (4)

c) Sketch and describe a vertically mounted watertight door. (8)

Q4:  Comment on the reliability and maintenance requirements of two of the following;

(i) Pneumatic control equipment,

(ii) Electro-mechanical control equipment,

(iii) Electronic control equipment

(b) Discuss the routine attention required and the defects, which may occur in service.

Q5. India, one of the world's five major ship recycling countries, has acceded to the IMO Hong Kong Convention, the treaty that will set global standards for safe and environmentally sound hip recycling.

Discuss the key features of "The Hong Kong International convention for the safe and environmentally sound Recycling of Ships''.

Q3. Compare methods of obtaining speed regulation of three-phase induction motor generally used in tankers by means of:

A. Rotor resistance; B. Cascade system; C. Pole-changing.

Give examples where each system may be employed with advantage.

Q3. With regards to boiler water level control. Explain the following

A. Shrink and swell phenomenon B. Cascade control C. Split control D. Condensing chamber – Function and location.

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.

Q3. Explain the following with reference to MARPOL Annex-VI

a) Ozone depleting substances and its emissions control. (5)

b) Volatile Organic and its emissions control. (5)

c) NOx emissions and its control from ships. (5)

d) NOX technical file. (5)

Q3. Discuss the advantages and disadvantages of adopting the following policies for maintenance of main and auxiliary diesel engines.

A. Planned maintenance.

B. Condition monitoring.

C. Periodic replacement of components. (16)

Q3. a) Describe with the aid of a sketch the construction of a single collar thrust bearing. (6)

b) Explain the principle on which it works. (5)

c) Explain how you would take the essential clearances and explain the significance of them. (5)

Q5. With reference to ship’s rudder state:-

Why can a breached hollow rudder add to fuel costs? (6)

Why excessive pintle clearance should not be tolerated? (5)

Why fitted bolts are used in connecting upper and lower stocks? (5)

Q4. With reference to a 3 speed a.c. cage motor driven cargo winch:

A. Sketch a circuit diagram for a pole change motor;

B. Describe how speed change and braking are achieved.

Q7. With reference to Keyless Propeller:

A. Sketch a section through a keyless sleeved propeller.

B. State the advantages of using a keyless sleeved propeller

C. State with reason, Which metal sleeve should be made for contact with the forged mild steel tail shaft?

D. State the material uses to bond the sleeve to the propeller and the general thickness of the bonding material.

Q4. Explain the following

a) SEEMP I, II, III (5)

b) PSSA (5)

c) EEXI & CII (5)

d) SOPEP (5)

Q8. With reference to shaft alignment:

(a) Explain the meaning of fair curve or rational alignment;

(b) Shaft alignment is often verified using hydraulic jacks to obtain a simple graph. Sketch such a graph, indicating the following:

(i) Static load;

(ii) Hysteresis;

(iii) Influence number;

(c) Explain the limitations of checking shaft alignment solely by hydraulic jacking methods.

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.

Q1. What is a marine high voltage system? Sketch and describe a shipboard high voltage switch board and its protective devices.

Q9 It is detected that the refrigerating compressor on board your ship has not been properly aligned with the motor, after a major overhaul ashore Enumerate how the misalignment is detected and remedied.

Q4. Fatigue is one of the main causes of crankshaft failure.

A. Indicate on a Sketch the most likely location of a fatigue crack;

B. How is a fatigue failure is identified;         C. Describe initiation of a fatigue crack;

D. Sketch and Describe the methods used to inhibit fatigue cracks

Q5. With Reference to the Maritime Labour Convention (MLC) 2006, discuss the requirements for seafarers regarding:

a) Entitlement to leave (7)

b) On-board and on-shore complaint procedures (7)

c) Safety and health education of young seafarers (6)

Q5. a) Outline the problems associated with effective lubrication of the liner and piston assembly of a large slow speed engine. (6)

b) What are the causes of cloverleafing and micro seizure. (5)

c) Explain the composition of a cylinder oil suitable for an engine operating on residual fuel. (5)

Q1. A. Sketch a transverse section through the hold space of a container ship hull;

B. Referring to the sketch in (A) describe how adequate structural strength is built into the hull.

Q3. Differentiate between half and full wave rectification. State where half wave rectification may be used and the purpose for which it is not well adapted. Sketch a bridge connection by which full wave rectification may be obtained.

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 respect to Energy efficient running of ships;

(a) Sketch and explain the optimization of propeller hull interface flow devices and improvement of propulsion efficiency.

(b) sketch and explain the optimization of Auxiliary machinery using VFDs.

Q6. As Second Engineer of a new ship,

a) Prepare standing orders for all future bunkering operations onboard. (7)

b) State why it is very important to obtain a representative sample of heavy fuel bunkers taken. (7)

c) Briefly discuss Marpol sample, In-use sample and on board Sample. (6)

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. A. Explain what is meant by the terms wave form, frequency and average value.

B. A moving coil ammeter, a thermal ammeter and a rectifier are connected in series with a resistor across a 110 V sinusoidal a.c. supply. The circuit has a resistance of 50 to current in one direction and, due to the rectifier, an infinite resistance to current in the reverse direction. Calculate:

(i) The readings on the ammeters; (ii) The form and peak factors of the current wave.

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.

Q5. A. Examine in detail three common but entirely different reasons for loss of steering gear systems. B. State how failure is inhibited in the design, operation and maintenance of steering gear systems C. Describe how a vessel may make port upon irreparable failure of the steering telemotor

Q6. With reference to bridge control of a large slow speed propulsion engine.

A. How is starting and reversing achieved?

B. Investigate and suggest remedial action required if the engine,

(i) Fails to turn on air.

(ii) Turns on air but fails to fire on fuel;

(iii) Fails to reverse.

Q7. A. Describe stability requirement for dry-docking. (6)

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. (10)

Q3: With reference to Regulation 12 of SOLAS Chapter XII, dealing with Water Level Detection and Alarm Systems to spaces:

A. Type of ships Water Level Detection and Alarm System is required to be installed. (7)

B. Brief description of such installation. (6)

C. Requirements with respect to detection system. (4)

D. Requirements with respect to an alarm system. (3)

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.

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. A. Draw a block diagram for a fully automated accommodation air conditioning unit, labelling the component parts and indicating the directions of air flow; B. Explain why the unit includes means of dehumidification and humidification; C. A chart is used for ensuring that the accommodation conditions are within the so-called Comfort Zone: what useful information does the chart give?

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.

Q8. With reference to auxiliary boiler safety valves:

a) Describe how the valves are set to lift at the desired pressure under steam. (6)

b) Describe the precautions to be taken to ensure that the valve cannot be tampered with after setting is completed. (5)

c) Briefly discuss accumulation of pressure test. (5)

Q6. Steering system failure has caused shipping casualties and oil pollution. Discuss

a) The causes of such failure (8)

b) The precaution necessary in design, operation, and maintenance of these systems. (6)

c) Requirements on tankers, which was made mandatory after the shipping casualty. (6)

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.

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.

Q7. Sketch and describe a stockless anchor illustrating the method or device used to attach it to the chain cable. When the anchor and cable are ranged during the ships underwater survey what parts require special attention and what defects are likely to be discovered?

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.

Q9. A. List the precautions necessary before an inclining experiment is carried out.

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.

Q9. (a) Discuss International Maritime Organization (IMO) Data Collection System (DCS) for fuel oil consumption of ships covering following:

(i) Applicability of ship size (GT)

(ii) When the requirement of Data Collection System (DCS) entered into force;

(iii) What data required to collect ship;

(iv) The aggregated data is submitted to who and when (frequency) to submit;

(v) Relevance of SEEMP pertaining to Data Collection System (DCS)

(b) List out the main differences between the EU Monitoring, Reporting and Verification (MRV) regulation and International Maritime Organization (IMO) Data Collection System (DCS).

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.

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.

Q4. With reference to Main engine piston rings:

(a) Analyze the causes of piston ring breakage.

(b) How maintenance and engine operation can minimize piston ring breakage.

(c) Explain the possible consequences with respect to performance and safety of operating the engine with broken or severely worn piston rings

Q8. Explain how the ingress of sea water is prevented in an oil lubricated stern bearing system. Should the system fail, describe the corrective action possible whilst the vessel is afloat. State why two stern bearing oil header tanks are fitted in some instances?

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)

Q10. A. Compare the effectiveness of a current limiting circuit breaker with that of a HRC fuse.

B. A coil having a resistance of 10 Ohm, and an inductance of 0.15 H is connected in series with a capacitor across a 100V, 50Hz supply. If the current and the voltage are in phase what will be the value of the current in the circuit and the voltage drop across the coil?