DieselShip's Online Content Library

Q1. Name various statutory Certificates and Documents to be carried on board general cargo ship giving reference to the conventions and justify for their requirement. (20)

Q1. a) Describe a method of the attachment of bilge keels. (5)

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

c) Explain TWO principles of roll damping that bilge keels exploit. (5)

Q5. With reference to electronic control systems:

A. Draw a simple block diagram for temperature control. (8)

B. Describe each component shown in the diagram in (a).  (8)

Q1. Write short notes on following: (16)

A. Magnetic Particle Inspection (MPI)

B.  Ultrasonic Testing (UT)

C. Radiographic Testing (RT)

D. Liquid penetrant testing (PT)

---Previously Asked As---

Q2. Write short notes on following:

A. Magnetic Particle Inspection (MPI)

B.  Ultrasonic Testing (UT)

C. Radiographic Testing (RT).

Q8. A. Describe the precaution necessary during the initial running-in of an Auxiliary Engine run on which is newly installed or has a major overhaul; B. Explain the possible causes of oxidation of lubricating oil.  C. State the frequency with which oil samples should be taken for analysis.

Q7. A. Describe the preparation necessary before the application (in dry dock) of sophisticated or approved long life coating to the underwater surface of the hull. (6)

B. State the significance of the roughness profile. (5)

C. List the different sophisticated coatings which are available. (5)

Q5. 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. (6)

b) State which alloy is used for the membrane and the reason. (5)

c) Explain why a secondary barrier is installed. (5)

Q2. (a) Define the term Torsional Vibration with respect to an engine crankshaft, stating the effect that high levels can have on an engine crankshaft.

(b) Explain how engine deterioration influences the risk of Torsional Vibration, stating what can be done to minimise that risk.

(c) Explain possible reasons for the activation of a Torsional Vibration alarm after an engine has been started if there had been no previous history of such an alarm and if no maintenance had been undertaken on the engine whilst it was stopped.

Q3. A. Sketch a line diagram of an automatic water sprinkler fire detection/alarm and firefighting system fitted in accommodation and service spaces of passenger vessels; B. Describe the system sketched above and its mode of operation; C. State the action that should be taken after the use of sea water in the firefighting system

--- PREVIOUSLY ASKED ---

2017/JUN/04 - 2016/MAR/02

Q4. Sketch a line diagram of an automatic water sprinkler, fire detecting alarm and extinguishing system type fitted in accommodation and service spaces of a passenger vessel for accommodation spaces; B. Describe the operation of this system; C. State the action that should be taken after the use of the above firefighting system.

Q3. a) Briefly explain the term metal fatigue and further explain how fatigue failure occurs. (4)

b) State the difference between high stress/low cycle and low stress/high cycle fatigue giving example of each. (4)

c) State how defects in the metal can influence the expected safe life of a component. (4)

d) State how fuel injection timing and cylinder power balance influence the possibility of fatigue cracks developing in the bedplate. (4)

---Previously Asked As---

2023/NOV/01 - 2024/OCT/02 - 2025/DEC/09

Q9. a) Explain metal fatigue and how fatigue failure occurs. (4)

b) Differentiate between high stress/low cycle and low stress/high cycle fatigue giving example of each. (4)

c) How do defects in the metal influence the expected life of a component. (4)

d) How does fuel injection timing and cylinder power balance influence the possibility of fatigue cracks developing in the bedplate. (4)

Q4. A. Describe a brush less alternator with A.C. exciter static A.V.R.. (8)

B. State the output voltage characteristics for this type of machine. (8)

Q1: During a river passage the propeller of a light ship is rotating at dead show revolutions ahead when it strikes a large floating object causing a momentary drop in engine revolutions.  As the Second Engineer of the vessel describe in report format, the inspection of the vessel’s propulsion and transmission system that you would supervise to ensure that is safe for the vessel to continue in voyage.  Assume that the vessel is anchored and that no outside assistance is available.

Q6. A. Describe information which is available in the record which is attached as a supplement to the IOPP Certificate, for a bulk carriers and oil tanker.

B. What are the provisions for engine room under MARPOL 73/78 Annex -1, for large ocean-going vessels?

C. What is IBC Code and what Certificates are issued under the Code and to which ship?

Q1. A. Explain in detail, how an underwater survey is carried out. (7)

B. State the requirements to be fulfilled before an underwater survey is acceptable to the survey authority. (5)

C. Construct a list of the items in order of importance that the underwater survey authority should include. (4)

- - -PREVIOUSLY ASKED - - -

Q3. With reference to Underwater Inspection in lieu of Dry docking (UWILD)

A. Explain in detail, how an underwater survey is carried out. (6)

B. State the requirements to be fulfilled before an underwater survey is acceptable to the survey authority. (5)

C. Construct a list of the items in order of importance that the underwater survey authority should include. (5)

Q3. A. State the necessary conditions required prior to the synchronizing of electrical alternators. (4)

B. Describe the type of cumulative damage that may be caused when alternators are incorrectly synchronized. (4)

C. Explain how the damage referred to in (b) can be avoided / reduced. (4)

D. For two alternators operating in parallel state the consequences of: (4)

(i) Reduced torque from the prime mover of one machine.

(ii) Reduced excitation on one machine.

Q8. What is understood by risk on board ship? As a 2nd engineer discuss various methods for hazard identification and assessment of risk available on board. (16)

Q6. Give a list of the properties or test by which distillate and blended fuels may be specified or decisions be made on their fitness for use. Name the properties or constituents that may be found in a blended fuel having a high viscosity and high carbon content. Explain how they may cause problems in engine operation. (16)

Q7. A. Explain why centrifugal pumps cannot handle air or vapours to effect priming yet turbo- blowers operating on the same principle can.

B. If a vessel is fully laden, how may it be ascertained that the fire pump priming arrangements would operate satisfactorily in the ballast condition.

C. Explain a suitable method of priming suitable for a centrifugal pump.

Q4. Define a Non-Conformity (NC) and a Major Non-Conformity (MNC) with examples according to the International Safety Management (ISM) Code. Explain the steps that should be taken by a vessel’s management when a Major Non-Conformity is identified. (20)

Q4. a) Explain the construction, working and adjustment procedure of a high-lift safety valve used on marine boilers. (8)

b) Describe the procedure, purpose and safety precautions involved in conducting an accumulation of pressure test on a marine boiler. (8)

Q5. a) Sketch the cross-section of a bulk carrier with either deep or shallow double bottom showing the type of framing used. (8)

b) i) Describe the corrosion problems experienced with ballast tanks. (4)

ii) State how such tanks are protected against extensive corrosion. (4)

Q4. Explain the effect of reduced voltage on standard squirrel cage motors with respect to EACH of the following:

(i) Burn out; (ii) Starting current; (iii) Starting torque; (iv) Speed.

Q3. a) State the circumstances owing to which it may be necessary to renew a cylinder liner. (3)

b) Explain how the liner is removed (5)

c) Explain how the new liner is fitted. State the important checks to be made before and after fitting. (5)

--- PREVIOUSLY ASKED AS ---

2024/OCT/04

Q4. a) State the circumstances owing to which it may be necessary to renew a cylinder liner. (3)

b) Explain how the liner is removed (5)

c) Explain how the new liner is fitted. State the important checks to be made before and after fitting. (5)

d) How the liner wear rate is calculated. (3)

Q6. State why the temperature of lubricating oil supplied to an engine needs close control. Sketch and describe an arrangement and explain the principle of operation of instrumentation and control equipment for automatically maintaining the temperature of lubricating oil supplied to an engine at its desired value

Q5. With the aid of a block diagram, briefly describe the effect which negative voltage feedback has on an amplifier and state the advantages resulting from the use of negative feedback. (16)

Q8. With reference to Maritime Labour Convention (MLC) answer the following:

a) Explain the structure of the convention with titles. (10)

b) Briefly, discuss DMLC Part I and II covering welfare measures for seafarers. (10)

Q8. With reference to electro-hydraulic steering gears:

A. Sketch and describe a steering gear with two 50% torque units conforming to the single failure criteria. (8)

B. State, with reasons, the precautions necessary when operating on two rams only: (4)

C. Describe the tests necessary to ascertain that the gear will operate as required when one side of the circuit develops a malfunction. (4)

Q9. (a) Define proportional control action. (4)

(b) Sketch and describe a simple pneumatic proportional controller. (4)

(c) State a process where a proportional controller may be employed. (4)

(d) State the disadvantage of proportional only action. (4)

Q3. With regard to ship construction details for transverse watertight bulkheads: -

A. State the purpose of this type of bulkhead;

B. State how the bulkheads are tested for water tightness;

C. If it is necessary to penetrate the bulkhead, precaution must be taken to ensure that the watertight integrity and the strength of the bulkhead is maintained. In view of above, describe, using simple sketches, how the following pass through bulkheads.

i. Main transmission shaft;                ii. Electrical cables;

iii. Fuel oil transfer pipes;                iv. Air and sounding pipes.

Q2. Sketch and describe the means used for operation of air starting valves of a large engine. Explain how engine reversal is affected.

Q6.a) What is the effect on the field flux of an alternator current in the synchronous motor that leads the terminal voltage. (6)

b) A 1,000-kVA, 11,000-V, 3-ϕ, star-connected synchronous motor has an armature resistance and reactance per phase of 3.5 Ω and 40 Ω respectively. Determine the induced e.m.f. and angular retardation of the rotor when fully loaded at (a) unity p.f. (b) 0.8 p.f. lagging (c) 0.8 p.f. leading. (10)

Q6. The HNS Convention is expected shortly to come into force. Explain the following in respect of this convention.

(a) List and give examples of substances covered under this convention

(b) Types of pollution and subsequent losses or damages which can come under this convention (c) Why would an oil products tanker probably require to have certificates under all 3 conventions i.e., CLC, Bunker and HNS. (20)

Q6. A. Explain the purpose of non-watertight longitudinal subdivision of tanks.

B. A ship 90 long displaces 5200 tonne and floats at draughts of 4.95m forward and 5.35 m aft when in sea water of 1023 kg/m³. The waterplane area is 1100m², GML 95m, LCB 0.6m forward of midships and LCF 2.2m aft of midships. Calculate the new draughts when the vessel moves into fresh water of 1002 kg/m³

Q7. What are the major types of stainless steels used on merchant ships? Briefly explain each type. Which grades would you recommended for use in sea water environment? Why?

Q4. During the overhaul of medium- speed auxiliary diesel generator you find that the white metal of one of the bottom end bearings has cracked. Explain how you would fit a spare bearing and enumerate the various tests you would carry before putting the machine back into service. (16)

Q6: 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.

Q7.a) Explain the process of voltage buildup in a self-excited shunt generator. (6)

b) A shunt-wound generator has a magnetisation-curve given by the figures below. The total resistance in the field circuit is 20 Ohm and the armature resistance is 0.02 Ohm. With the machine on load, estimate the e.m.f. generated and the armature current when the terminal voltage of the machine is 140V. (10)

Field current

(I)_amperes
1.2
2.8
5.0
7.0
7.7
9.0
11.0
Generated e.m.f. (e)_Volts
46
88
126
149
154
162
168

Q7. a) Describe the periodic maintenance procedures that must be carried out on a lifeboat, its equipment and its davit system to ensure proper operation. (10)

b) Explain the procedure for conducting a dynamic load test on a lifeboat davit and the criteria for evaluating the test results. Why is this test critical for ensuring the safety of the davit system? (10)

Q7. With respect to the refrigeration system on board vessels, answer the following

a) Why are some TEVs fitted with an external equalizing connection?

b) What is the purpose of a back pressure valve. what will the effect if it leaks?

c)How does an electronic TEV function.

Q8.With reference to crossheads:

a) Describe with sketches one arrangement whereby lubricant is fed to top end bearings, slippers, and guide.

b) Explain why the clearances of each top-end bearings are of vital importance.

c) state why booster pumps are sometimes used to feed lubricant to top end bearings.

Q9. (a) Describe how thrust power is determined. (6)

(b) The following information relates to a model propeller of 400mm pitch:

(i) Plot curves of thrust and torque against rev/min

(ii) When the speed of advance of the model is 150 m / min and slip 0.20, calculate the efficiency.

Q5. Explain the term “cascade control’ and sketch such a system suitable for use with a main engine jacket cooling water system. Show the variation of pressure and temperature at major points of the system.

Q8. a) Explain how excitation of the rotor is produced and supplied. (6)

b) A 75-kW, 400-V, 4-pole, 3-phase star connected synchronous motor has a resistance and synchronous reactance per phase of 0.04 Ohm and 0.4 Ohm respectively. Compute for full-load 0.8 p.f. lead the open circuit e.m.f. per phase and mechanical power developed. Assume an efficiency of 92.5%. (10)

Q8. a) Briefly discuss the different types of steam traps used on board, and how do you select the appropriate type for an oil tanker? (8)

b) What are the common maintenance tasks and frequency requirements for steam traps to ensure optimal performance, prevent steam leakage, and reduce energy losses, and how can regular maintenance help extend the lifespan of a steam trap. (8)

Q1. A) How is Human Element issue addressed in STCW code. (10)

B) Discuss the IMO guidance on fatigue mitigation and management on board ships. (10)

Q3. With reference to a main engine fuel system of the high-pressure common rail type:

(a) Sketch a common rail fuel injection system from booster pump inlet to cylinder head fuel valves, labelling the MAIN components.

(b) Explain how the fuel pumps are operated and the common rail pressure is maintained;

(c) Explain how fuel injection timing and quantity is regulated for the common rail fuel system sketched in part (a).

Q8. A. Explain why the amplitude of ship motion should be limited.

B. A ship of 8100 tonne displacement floats upright in seawater. KG = 7.5m and GM = 0.45m A tank, whose centre of gravity is 0.5m above the keel and 4m from the centreline, contains 100 tonne of water ballast neglecting free face effect, calculate the angle of heel when the ballast is pumped out.

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.

Q9.a) Explain the principles of A.C. Motors starting and speed control, including the effect on efficiency. (6)

b) A 3-phase induction motor has a 4-pole, Y-connected stator winding. The motor runs on 50-Hz supply with 200V between lines. The motor resistance and standstill reactance per phase are 0.1 Ω and 0.9 Ω respectively. Calculate (a) the total torque at 4% slip (b) the maximum torque (c) the speed at maximum torque if the ratio of the rotor to stator turns is 0.67. Neglect stator impedance. (10)

Q9. a) Explain the effect of bilging a centreline compartment located away from amidships. (6)

B. A ship of 5000 tonne displacement has a double bottom tank 12m long. The ½ breadths of the top of the tank are 5, 4 and 2m respectively. The tank has a watertight centreline division. Calculate the free surface effect if the tank is partially full of fresh water on one side only. (10)

Q9. With reference to port State control

a) List the certificates which a Port State Control Officer (PSCO) may like to see during inspection. (10)

b) List the Life Saving Appliances and Fire Fighting Equipments which are likely to be inspected by PSCO. (10)

Q9. a) What are the key factors that influence the choice between a gear drive and a chain drive for a large marine engine. (6)

b) Define backlash and explain how backlash is measured and corrected in a gear drive of large marine engine. (5)

c) Discuss the effects of increased backlash on the performance and reliability of a large marine engine. (5)

Q9. a) For a large slow speed direct reversing engine, describe in detail the profile of a cam suitable for fuel pump operation in either the ahead or astern mode. (6)

b) With respect to cam material, describe the heat treatment employed during manufacture. (5)

c) Explain how the position of the cam relative to the crankshaft is altered when changing from Ahead to Astern running. (5)

--- PREVIOUSLY ASKED ---

2023/FEB/06

Q6. a) For a large slow speed direct reversing engine, describe in detail the profile of a cam suitable for fuel pump operation in either the ahead or astern mode

b) With respect to cam material, describe the heat treatment employed during manufacture.

c) Explain how the position of the cam relative to the crankshaft is altered when changing from ahead to astern running,

d) State how the position of the cam would be correctly set if it were replaced.

Q2.a) Define fatigue and fracture and specify the conditions under which it occurs.

b) Describe the different fracture modes and the mechanism of crack propagation in different fracture modes.

Q10.a) Draw the complete phasor diagram of the transformer under no-load conditions. (6)

b) The following results were obtained on a 50 KVA transformer: open circuit test-primary voltage, 3300 V; secondary voltage, 415 V; primary power, 430 W. Short circuit test primary voltage, 124 V; primary current, 15.3 A; primary power, 525 W; secondary current full load value. Calculate: (10)

(i) The efficiencies at full load and at half load for 0.7 power factor

(ii) The Voltage regulations for power factor 0.7 (i) lagging, (ii) leading

(iii) The secondary terminal voltages corresponding to (i) and (ii)

Q6. A. Describe the stability requirements of a ship for dry-docking.

B. A ship of 8000 tonne displacement, 110m long, floats in sea water of 1.024t/m3 at draughts of 6m forward and 6.3 m aft. The TPC is 16, LCB 0.6 m aft of midships, LCF 3m aft of midships and MCT1cm 65 tonne m, the vessel now moves into fresh water of 1.000t/m3. Calculate the distance a mass of 50 tonne must be moved to bring the vessel to an even keel and determine the final draught.