DieselShip's Online Content Library

Q1: Define five of the following, stating how they affect the ship structure and what component parts of the ship structure help to resist the effect of - A. Raking; B. Water pressure effect; C. Panting; D. Pounding; (e)Local weights;(f) Vibration from engine and propellers.

Q1. With reference to SOLAS 74 amendments 2000, maintenance plan is to be kept on-board ship for firefighting system, Enumerate the list of fire protection system and fire-fighting systems and appliances, which will be required to be included in the maintenance plan. B. Training manual as required by SOLAS 74 amendments 2000, Chapter II-2 contains instructions and information with respect to fire fighting. List the same and their significance.

Q1. In a ship's power system, the neutral on the low voltage side is not grounded, but it is mandatory to ground the neutral in high voltage systems. Discuss in detail for the above difference and with suitable sketches, explain the different earthling arrangements for HV system.

Q7. An Auxiliary boiler is periodically unattended and equipped with alarms to cover low water level, high steam pressure, and air and flame failure.

A. State why and how fuel the burners are automatically cut off under alarm conditions of water level, steam pressure, air and flame failure.

B. Describe how and when each of the above alarms is tested without endangering the boiler.

Q1. A. Describe with sketches a scroll type fuel pump; B. Explain how the quantity of fuel is metered and how the governor cut out functions; C.  State how this type of pump is set after overhaul; D. State the reasons that necessitate pump overhaul.

Q1. A. Explain the ideal design requirements of a ships propeller; B. briefly describe the propeller maintenance that should be carried out to prevent the fuel being wasted.

Q9. A. Describe the general precautions to be taken against capsizing. State the recommended criteria for passenger and cargo ships.  B. The ½ ordinates of a water plane at 15m intervals, commencing from aft, ar. 1, 7, 10.5, 11, 11, 10.5, 8, 4 and 0m. Calculate: i. TPC; ii. Distance of the centre of flotation from midships; iii. C. Second moment of area of the water plane about a transverse axis through the centre of flotation.

Q2. The international Safety Management (ISM) Code requires involvement and responsibility of the company in enforcing “emergency preparedness” procedures for a ship and its personnel. What advantage does it have under ISM Code? Describe the duties of the company in: - A. Forming the emergency team; B. Emergency situations; C. Maintaining contact between ship and office. D. Use of ship’s relevant information.

Q2. Describe / troubleshooting the problems in a typical PLC based system taking care of the safety requirements. (Explain each test method according to various steps to be taken in serial order Including setting-up of any instrument to be used)

Q9. A. With reference to the insulation testing of marine electrical plant: - I. State the reasons for insulation testing; II. State the precautions to be observed when testing intrinsically safe equipment. B. Describe the overhaul of d.c. motor which has been subjected to excessively damp condition or flooding with seawater.

Q2. With reference to lifeboats, describe with the aid of sketches: i. The handbrake used for lowering and state how it may be tested; ii. The centrifugal brake and state the method of testing; iii. Lifeboat servicing requirement and intervals for life boat wire fall renewal as per SOLAS 74. iv. The handbrake used for lowering

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.

Q3. Describe the effect on GM of rolling and how bilge keels, anti-rolling tanks and stabilizer fins reduce the amplitude of rolling.

Q5. With reference to oil monitoring of bilge and tanker ballast discharges:

A. Describe with the aid of a sketch the general arrangement of an oil monitoring system;

B.  State the inputs that are recorded;

C. Explain the difficulties encountered with the efficient operation of the monitoring systems.

Q3. Specify the type of frequency converter (with thyristor control) suitable for a 5 MW diesel electric propulsion with fixed pitch propeller, with complete analysis, waveforms, proper speed control method and detailed justification for the same.

Q3. Referring where necessary to design, construction and operation, outline the measures to prevent fires caused by spillage of fuel, lubricating and hydraulic oil, involving EACH of the following: Pipes, fliers, valves and cocks; Oil units, pumps and fittings; Overflow arrangements; Sounding arrangements; Lubricating oil; Starting air pipe lines; Electric cables.

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.

Q3. A. Explain the causes of the formation of mill scale on steel plate. 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.

Q4. A rudder of a vessel requires extensive welding repairs and as second engineer you are requested to supervise. A. Suggest a suitable type of welding process; B. State, with reasons, FOUR common welding defects; C. State what tests may be carried out before returning the rudder to service.

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.

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.

Q3. With respect to power transformers kindly explain the following protections

1. Overload protection 2. Overcurrent protection for phase faults 3. Earth Fault protection 4. Differential protection 5. Directional protection

Q4. Describe three ways in which each of the following defects would reveal itself during full power operation of an engine:A. Cracked liner; B. Defective fuel valve; C. Overheated bottom end bearing; D. Inefficient turbocharger

Q3: A. (i) Sketch a combustion gas system, suitable for inerting the cargo spaces of a vessel; (ii) Describe the operation of this system. B. State the percentage analysis by volume of the inert gas generated by the system in (A).

Q2. What are NOX & SOX limitations as per Annex VI of MARPOL. B. Briefly describe methods to control NOx emission and SOX emission.

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. 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.

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.

Q5. It is discovered that delivery of air from a turbocharger has fallen even though engine fuel control has not been changed. State with reasons: A. The causes of such reduced delivery; B. The effects of this reduced air supply on the engine: C. The immediate action to be taken; D. How future incidents might be minimized.

Q5. With regards to keeping the gas side of a boiler in good condition discuss each of the following A. The mechanism of combustion stating the factors which are important for good combustion; B. Fuel oil treatment; C. Soot removal equipment.

Q6: A. the UMS monitoring and control system of your ship has recently started to give false alarms and incorrect data printouts. State, with reasons, possible causes if the false alarms and reading are: I. Localized to a particular area of engine operation; ii. General to the engine room; B. State, with reasons, the action you, as Second Engineer, would take to ensure continued safe operation of the vessel if the defects were general to the engine room. C. Explain the procedure you, as Second Engineer, would adopt in order to locate and rectify a general fault in the UMS system.

Q8. A. Why is it important in a tender ship to keep the double bottom tanks pressed up?

B. A ship of 6000 tonne displacement has a wetted surface area of 2500 m2 and a speed of 15 knots.

(i) Calculate the corresponding speed and wetted surface area of as similar ship of 2000 tonne displacement.

(ii) If the ship resistance is of the form R=0.45 S V1.83 N; find the resistance of the 6000 tonne Ship.

Q6. What design factor limits the maximum torque of a d-c motor? Of an a-c motor? A shunt motor runs on no load at 700 r/min off a 440 V supply. The resistance of the shunt circuit is 240?. The following table gives the relationship between the flux and the shunt current: Calculate the additional resistance required in the shunt circuit to raise the no-load speed to 1000 r/min.

Shunt current (A)
0.5
0.75
1.0
1.25
1.5
1.75
2.0
Flux per pole (m Wb)
6.0
8.0
9.4
10.2
10.8
11.2
11.5

Q6. An auxiliary boiler water level control system has a differential pressure transmitter as the detecting element for water level.

A. Sketch and describe such an arrangement; B. If the transmitter was damaged describe how a replacement unit would be calibrated

Q6. Discuss possible defects, which can occur in top end bearing of heavy oil engines and describe methods adopted to obviate such defects. Why is it considered necessary to supply high-pressure lubricating oil to top and bearings?

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?

Q10. A. List the main factors which affect the rolling period of a vessel; B. A box-shaped vessel is 20 m long and 10 m wide.  The weight of the vessel is uniformly distributed throughout the length and the draught is 2.5 m.  The vessel contains ten evenly spaced double bottom tanks, each having a depth of 1m. Draw the shear force diagrams: With No.1 and No.10 tanks filled; With No.3 and No.8 tanks filled; With No.5 and No.6 tanks filled. Which ballast condition is to be preferred from the point of view of strength?

Q4. A. Sketch a simplified circuit that may be incorporated in a control panel for an array of fire detectors.

B. Describe the following features that may be found in a control panel for fire detectors:

i) Audible fire alarm circuits;

ii) Identification, of zone of fire;

iii) Automatic change, over from normal power supply

Q7. A. On what factors does the capacitance of a parallel-plate capacitor depend? B. A tuned circuit consisting of a coil having an inductance of 200µ H and a resistance of 20Ω in parallel with a variable capacitor is connected in series with a resistor of 8000Ω across a 60 V supply having a frequency of 1 MHz. calculate A. The value of C to give resonance; B. The dynamic impedance and the Q factor of the tuned circuit; C. The current in each branch

Q7. 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

Q1. With reference to torsional vibrations in a main propulsion installation based on medium speed engines, gearbox and controllable pitch propeller: Explain how the vibrations may be caused; State the possible effects and damage that could result; Discuss the methods employed to minimise the potential problems associate with torsional vibration; Describe how the natural vibration frequency of the system could be modified.

Q7. With reference to air compressors give a reasoned opinion as to the accuracy of the following statements A. Bottom end and main bearing wear down is critical to compressor performance B. High flow rates in air discharge lines are desirable C. The smoother bore and the less obstruction in discharge lines and valves, the better.

Q7. A. what is the effect on fuel consumption per unit time, if the ship’s speed is outside its operation range? B. The frictional resistance of a ship in fresh water at 3m/s is 11N/m2.  The ship has a wetted surface area of 2500m2 and the frictional resistance is 72% of the total resistance and varies as speed 1.92.  If the effective power is 1100Kw, calculate the speed of the ship.

Q8. As a second engineer officer, State the instruction and training you would give to staff under your control for the following situation: - A. Entry into enclosed spaces. B. Precaution that must be observed whilst personnel are in the space and the action to be taken in the event of an accident. C. Rescue of a person overcome by fumes in a confined space such as pump room.

Q8. A. What is reactive power? Why is such term not encountered when d-c sources are used in electric circuit? B. A transistor amplifier stage comprises a transistor of parameters hie = 800 Ω and hfe = 50 and hoe = 20µ S, and bias components and coupling capacitors of negligible effect. The input signal consists of an e.m.f of 60mV from a source of internal resistance 2.2k Ω and total load on the stage output is 4k Ω. Determine the current, voltage and power gains of the amplifier stage.

Q8. For vapour compression refrigeration machine, state how each of the following faults are indicated and how they are remedied:

(a) air in the system;

(b) Moisture in the system;

(c) undercharge;

(d) overcharge;

Q8. Sketch a cross section through a piston rod stuffing box; A. Define with detail sketches the function of and difference between, sealing rings and scraper rings; B. Identify with reasons those details which should receive particular attention during overhaul of the complete assembly.

Q8. Explain why regular testing of water in auxiliary boiler is desirable; for each test, i.e. is carried out; Reason for making test; Acceptable values for any particular type of boiler; Action to be taken if measured value differs from desired value.

Q9. A. Describe the procedure for speed, Power and fuel consumption trials. B. A propeller of 4m pitch has an efficiency of 67%.  When turning at 125 rev/min the real slip is 36% and the delivered power 2800Kw.Calculate the thrust of the propeller.

Q9. With reference to a lifeboat gravity davit arrangement: A. Sketch the arrangement showing the lifeboat both in the housed position and at its maximum point of outboard travel; B. Describe the lowering and raising of life boat stating the safety features and the requirement as per SOLAS 74, with respect to time for hoisting.

Q9.  A. Explain how the voltage regulation of a transformer is defined. Is this quantity large or small for the iron-core transformer? Explain B. A single-phase transformer has 480 turns on the primary and 90 turns on the secondary. The mean length of the flux path in the core is 1.8m and the joints are equivalent to an air gap of 0.1mm. The value of the magnetic field strength for 1.1T in the core is 400 A/m, the corresponding core loss is 1.7W/Kg at 50Hz and the density of the core is 7800 Kg/m3

Q7. A. Sketch a fuel injector;

B. Explain how it operates and what determines the point at which injection occurs;

C. Describe the defects to which fuel injectors are prone;

D. How can fuel injection be improved when a low speed engine is to operate at prolonged low load.

Q6. Sketch and describe a system for oil monitoring of bilge and tanker ballast discharges. What inputs are recorded? Explain the difficulties encountered with the efficient operation of the oil monitoring system.

Q10. A. Explain the considerations which govern the size and shape of a rudder. 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.

Q10. A. The capacitor-start induction run motor has a much higher starting torque than the resistance split-phase motor, Explain.

B. An eight-pole armature is wound with 480 conductors. The magnetic flux and each conductor is capable of carrying a full load current of 100A. Calculate the terminal voltage on no load. The output current on full load and the total power generated on full load when the armature is 1. Lap connected 2. Wave- Connected.