QUESTION BANK MARINE ENGINEERING PRACTICE PART-4

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Q Briefly describe your action plan on the following exigencies:

a) Leaky economiser tube, while at sea

b) Leaky intercooler of main air compressor, while manoeuvring

c) Explain reasons and remedial actions for “fall off” in heat exchanger performance, if this is

i. Gradually

ii. Suddenly

Q Explain in detail how you would isolate one of sprinkler system for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service.

Q Accidents regularly occur due to premature or accidental release of CO2 into machinery spaces. With reference to this, enumerate the procedure or arrangements that you as Second Engineer would adopt with respect of the following:

a) Contractors working on CO2 system.

b) Understanding between bridge and engine room in the event of a machinery space fire.

c) Familiarizing staff with the system.

d) What checks and tests would be carried out, before putting the system in operation?

Q 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.

Q a) Sketch and describe the construction and operation a life boat which handbrake and centrifugal brake.

b) What maintenance to the brakes require.

c) At what lowering velocity does the centrifugal brake operate? Can this be adjusted? If so, how?

Q Describe the procedure for regular routines to be carried out on the following systems:

a) CO2 total flooding system of engine room

b) Smoke detection system

c) Sprinkler system

Q What is understood by risk on board ship? As a Second Engineer discuss various methods for hazard identification and assessment of risk available on board.

Q With reference to the adoption of unmanned machinery spaces describe routine maintenance on automatic control and alarm systems to deal with:

a) High bilge level

b) Fuel oil tank overflow

c) Bearings overheating

d) Fire detection

Q As a Second Engineer prepare a list of the operating and maintenance procedure you would institute for care of the main engine giving reason for each procedure and the trouble likely to arise from neglect of such procedure.

Q The failure of bridge control and remote control from engine control room has occurred during manoeuvring in closed water. What all important data will be required to be monitored and recorded manually? Explain how you will organize your staff for effective watch keeping.

Q a) During the weightage of CO2 bottles required for total flooding of Engine room, it was observed that few bottles are less than the original capacity. State the reasons for the same and checks/tests to be made prior refilling.

b) State how often the CO2 bottles are required to be weighed and pressure tested.

Q With respect to hydraulic Ram steeling gears

a) What emergency locking device can be used in order to speedily bring the steeling gear to rest?

State one reason the best angular position to lock the steeling gear.

b) Use a simple sketch to show where the “Jumping” (top) & “wear down” (bottom) rudder carrier ring clearances can be measured. Indicate what clearances you would expect with the new steeling gear

c) State the consequences of the wear down clearances being reduced to less than 0.

Q What are the effects of following on the sluggishness of steering gear operations?

a) Air entrapped in the hydraulic oil.

b) Worn pins & weak springs in hunting gear

c) Shock valves leaking

Q a) Suggest 4 reasons why the temperature of the oil in the steering gear system may become excessive.

b) With reference to the steering gears explain how the ship may be steered in each of the following circumstances.

i. Destruction by fire of the primary supply cable

ii. Destruction by the fire of the telemeter lines

iii. Bearing failure in the running pump

Q What provision is made to avoid damage to the steering engines when they are situated adjacent to the rudder stock? Describe a steering system showing how it is controlled from the bridge. What is hunting gear? Describe its action?

Q What provision is made to avoid damage to steering engines when they are situated adjacent to the rudder stock? Describe a steering system showing how it is controlled from the bridge. What is hunting gear? Describe its action?

Q With reference to steering gear hydraulic systems:

a) Explain the factors that could contribute to failure of the connecting flange leading to total loss of oil from the system;

b) Describe an arrangement designed to assure that the problem would not cause steering failure.

Q a) State the circumstances that may lead to follow rudder becoming flooded.

b) Describe how flooding of rudder may become evident when a vessel is on passage.

c) Describe the procedure for:

i. Rudder examination

ii. Rudder repair

Q a) What would you do if the transmitter fails to return to mid-position? What steps to be taken to bring the rudder to return to midships?

b) What type of auxiliary gear is used with an electro-hydraulic gear if the rudder-stocks greater than 228 mm? How would you isolate one unit to put it on the stand-by? What prevents one unit from motoring the other?

Q With reference to steering gear hydraulic systems:

a) Explain the factors that could contribute to the failure of connecting flange leading to total loss of oil from the system.

b) Describe an arrangement designed to assure that the problem would not cause steering failure.

Q a) Describe the survey procedure of an oil lubricated stem bearing and shaft.

b) Explain how the integrity of the outboard seal of an oil lubricated stern tube may be ascertained to have been achieved in the drydock before flooding takes place.

Q With reference to a transmission shaft coupling which enables the propeller shaft to be withdrawn outward.

a) Describe the coupling and method of fitting and dismantling.

b) State how the grip of the coupling can be checked when fitted.

c) State what precaution should be taken when dismantling the coupling?

Q a) Sketch a transmission shaft coupling which enables the propeller shaft to be withdrawn outward.

b) i. Describe the coupling and method fitting and dismantling.

ii. State how the grip of the coupling can be checked when fitted.

iii. State what precautions should be taken when dismantling the coupling.

iv. Why should coupling bolts be interference fits?

v. State why reasons the metal that the intermediate and tail end remission shaft are made of.

Q What is understood by the “trueness” of a shaft? As Second Engineer discuss a method by which the “trueness” of a ballast water pump shaft can be assessed?

Q Describe a suitable means of withdrawal procedure for the removal of keyless propellers.

Q You are in a foreign port without docking facilities. Your propeller is damaged beyond repair. Describe how you change propeller (vessel having main machinery amidships).

Q a) Describe the procedure for removal of a propeller shaft Describe an inspection of the propel shaft.

b) Give different reasons why the frequency between withdrawals of tail shaft for inspection purpose might be increased.

Q With regard to the carriage of crude oil and its associated products:

a) State the dangers involved

b) Sketch and describe the operation of an explosive meter suitable for testing pump rooms or tanks.

Q State the routine maintenance required to be undertaken at periodical intervals, for inert gas system of larger tankers?

Q During normal engine operation a turbocharger rapidly loses speed & the speed reduction is accompanied by appreciable noise.

a) State with reasons the possible causes.

b) Explain in detail how the engine might be safely operated if the damage causes by this incident is such that the turbocharger cannot function.

c) State, with reasons, the factors which may limit engine operating speed with a turbocharger out of action.

Q Describe the nature and the possible effects on machinery operation of deposits, which may adhere to the internal surfaces of exhaust gas turbo-blowers and explain how these deposits are removed

Q Describe how vibration measurement can be used with a main engine turbo charger:

a) For fault analyses.

b) For condition monitoring for maintenance.

c) As a substitute to opening up machinery for survey.

Q One of the main engines turbocharger on the vessel aboard which you are serving as Second Engineer has suffered a sudden and unexpected failure, State the causes and action undertaken in bringing the turbocharger back into service. What action you will initiate to avoid such reoccurrence.

Q In a turbo charger, explain the effects of following:

a) Deposits on Impeller

b) Deposits on Turbine nozzles

c) Damaged Labyrinth Seals

Q a) Sketch and describe a pneumatically operated control valve.

b) Explain how the valve is operated if the controller fails.

c) Discuss the routine maintenance required for these valves.

Q a) Describe the overhaul of a boiler safety valve and explain, using sketches where necessary, those parts, which require particularly close attention.

b) Describe the setting of boiler safety valve to comply with classification society requirements.

Q With reference to safety valves fitted to waste heat boilers:

a) State with reasons the areas which should receive particularly close examination during a survey inspection.

b) Describe the procedure you, as Second Engineer would adopt when setting such valves at sea.

c) State the procedure to be adopted when reporting the setting of a waste heat boiler safety valve to a classification society.

Q Describe the method of setting the safety valves of an exhaust gas boiler at sea.

a) State the limit in terms of percentage above maximum design working pressure, for setting safety valves.

b) State the formality necessary when the chief engineer sets the safety valves.

Q With reference to auxiliary boiler safety valve:

a) Describe, with the help of a sketch, the safety valves for an auxiliary boiler and how the setting of the safety valve is done.

b) Identify, with reasons, the parts that require particularly close attention during the overhaul.

c) Describe how the safety valves are reset after an overhaul.

Q With reference to auxiliary boiler safety valves:

a) Describe, with the aid of a sketch, the importance of each component.

b) Identify, with reasons, the parts that require particularly close attention during overhaul.

c) Describe how the safety valves are reset after an overhaul.

Q With reference to auxiliary boiler safety valves:

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

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

c) Explain how safety valves can be opened manually in an emergency.

Q With suitable sketches identify with reasons those parts of a safety valve of a type normally mounted on an auxiliary boiler that require particular close examination and attention during overhaul. Describe how the valve is reset under steam after overhaul.