DieselShip's Online Content Library

Q1. (a) Draw the indicator diagrams of a 2-stroke main engine, showing each Step of the 2-stroke cycle (6)

(b) How is Power of a 2-stroke main engine with 6 units is calculated with the help of indicator diagrams (10)

Q3. Explain the purpose of following and ship construction with suitable sketches. (16)

(i) Frame

(ii) Beam

(iii) Floor

(iv) Stringer

Q4. Describe the following non-destructive test methods:

a) Dye penetration test principle, and method in details. (8)

b) Magnetic particle testing principle and method in detail. (8)

Q3. (a) Why Engineering Materials are tested prior manufacturing of their components. (6)

(b) Describe the various destructive and non-destructive tests carried out on materials for shipboard used. Explain the purpose of each test and where the same applied. (10)

Q2. (a) Name the different types of lubricating principles used in the lubrication of ships machinery (10)

(b) Give examples in each case, stating the names of machinery/ components/ system where same applied (6)

Q2. Describe the following process with the steels.

(a) Annealing (4)

(b) Normalising (4)

(c) Quenching (4)

(d) Tempering (4)

Q2. With respect to 2-stroke and 4-stroke Diesel engines, describe

(a) What are the advantages and disadvantages of 2-stroke and 4-stroke engines? (8)

(b) Uses of each type of engine on board ship with reasons (8)

Q3. (a) Explain the role of hatch covers in dry cargo vessels and mention the types of mechanically operated hatch covers (5)

(b) Sketch and describe the operation of hatch cover of single pull type Macgregor design, front rolling type (7)

(c) How is the 'watertightness’ ensured for same? Explain the function of 'cleats'. (4)

Q3. With diagrammatic sketches, describe following joints used in welding.

(a) Butt joint (4)

(b) T-joint (4)

(c) Lap joint (4)

(d) Corner joints (4)

Q3. (a) Draw a sectional diagram of cylinder liner of 2-stroke diesel engine, marking each part. What is the material of cylinder liner? (8)

(b) How cooling of liner is achieved satisfactorily (4)

(c) What is cleaning ring and where it is fitted? (4)

Q4. (a) What are the different classes of subdivision of fire protection in ships? (8)

(b) What are the conditions to be met by different classes of subdivision? (8)

Q4. (a) What is the function of connecting rod in a 2-stroke marine diesel engine? (4)

(b) Draw a diagrammatic sketch of connecting rod of 2-stroke engine. Name each component and describe its function. (8)

(c) Draw a diagrammatic sketch showing how lubricating oil is passed to crankpin bearing. (4)

Q8. a) Describe by drawing a suitable diagram, Bilge water System of an ocean-going ship. Name each part/equipment with its function. (10)

b) Describe problems associated with Bilge water system and their solutions. (6)

Q5. (a) Explain the use of boiler mountings. State as to why they are provided. (6)

(b) Name all mountings provided on water tube boilers individually and explain their purposes. (10)

Q5. (a) What is a composite boiler? Draw diagrammatic sketch of composite boiler and name each part. (8)

(b) What are the methods used to control the temperature in the steam drum? (6)

(c) What are the advantages of having composite boiler on the ship? (2)

Q1. (a) How busbar inspection and maintenance is carried out. (10)

(b) What are safety precautions taken while doing maintenance on the busbar? (6)

Q2. (a) What are the causes of an uptake fire? (6)

(b) State the conditions under which light soot fire, intensifies to a high temperature fire in boiler uptake. What temperatures are produced in each case. (6)

(c) How boiler uptake fire is controlled? Why the use of soot blowers is prohibited? (8)

Q7. a) Describe following terms used for pumps,

i) Flow Rate. (2)

ii) Pressure. (2)

iii) Head. (2)

iv) Net Positive Suction Head. (2)

b) During watch keeping round what checks are required on a running centrifugal pump? (8)

Q6. (a) Explain the basis for deciding the capacity of main air reservoir on a motor ship for propulsion system. State appropriate rules (6)

(b) Sketch and describe a main air reservoir. Name the mountings provided/fitted and their use. What safety features are provided/fitted (10)

Q6. (a) Explain fuel oil treatment process on board, before it is fit for use in main and auxiliary engines (8)

(b) What is the sign of incompatible fuel oil? What action is taken when incompatibility or not? (4)

(c) What is series purification of fuel oil, when it is required to be put in operation? (4)

Q9. (a) What is Accumulation of pressure test for Boiler and what is its purpose? (6)

(b) Describe the detailed procedure for an Accumulation of pressure test. (10)

Q7. (a) What mountings are installed on a 4-stroke auxiliary engine cylinder head (6)

(b) Describe the procedure for lifting auxiliary engine cylinder head. (10)

Q7. (a) What lubricating oil test are carried out on auxiliary engine sump oil (4)

(b) What interference is drawn from each of the tests? (4)

(c) What action will be taken when abnormal results are obtained? (6)

(d) What is the frequency of on-board LO test? (2)

Q8. (a) Explain 'short cycling' in the context of refrigeration and air conditioning systems onboard ship. State its causes and how it can be avoided. (6)
(b) State the symptoms of 'overcharging' and 'undercharging' in refrigeration system. What are its effects and state remedial measures (5)
(c) What are the visible indicators of oil in refrigeration system. What would be its effects? State remedial measures (5)

Q8. (a) State the purpose of 'freshwater' and 'salinity water' hydrophore systems on ship (4)

(b) Explain through a line diagram, the functional components and other fittings of 'fresh water' hydrophore system. Also show as to how the calorifier is attached to this system. (8)

(c) Explain as to how is the hydrophore system is charged? Give procedure (4)

Q8. Describe actions to be taken with reasons for the following malfunction on auxiliary boiler.

(a) Pilot burner does not fire (4)

(b) Efficiency of boiler is low (4)

(c) Low water level in boiler (4)

(d) Flame failure. (4)

Q8. (a) Describe the function of Thrust bearing (4)

(b) Draw diagrammatic sketch of Thrust bearing and show the lubrication of each part (8)

(c) Describe the lubrication problems of thrust bearing (4)

Q9. (i) For a centrifugal pump, draw its performance characteristics and clearly explain the same (6)

(ii) Draw a curve showing efficiency versus flow rate of centrifugal pump (n vs Q) (6)

(iii) What interference can be drawn from these curves (4)

Q9. Describe the procedure for flooding of DRY DOCK after completion of drydocking. Describe all the precautions to be taken on the ship prior flooding of the drydock. (16)

Q9. With respect to medium speed diesel engines,

(a) Describe types of main bearing failure (8)

(b) Describe prevention of each type of failure (4)

(c) What are the reasons for crankpin bearing bolt failure? (4)

Q4. a) Sketch and describe the working of a Sprinkler type, automatic fire detection and firefighting system on ships, labelling it components in the circuit (10)

(b) What maintenance is required periodically? State the routine tests required? (10)