Collected COC Questions from 4th Class Oral Examinations (Marine Engineering)
This is for my personal, friends, and juniors reference in the near future. COC stands for Certificate of competency to qualify one as a Marine Engineer according to the ranks. There are 4 classes of COC. Class 1, 2, 3 and 4. These below are the examples of 4th class oral examination questions.
• 2s ngan 4s timing diagram
• m/e lo system
• boiler gauge glass blow down
• scavenge fire
• prepare m/e
• start boiler from cold
• stuffing box sketching and how its works
•t/c crosscut and explain system
• list 5 international convention with year (stcw.marpol,solas,load line, convention on tonnage measurement 69)
• basic requirement b4 going on board (list all modular courses)
• safety vv full bore (sketch n explain n nt need d full thing.vv seat area sketching good enough)
• t/c(sketch n explain system)
• t/c lubrication line
• boiler blowdown procedure (gauge glass, bottom, scum)
• m/e prep
• taking over watch
• c/case explosion (how happen and how to avoid.how vapour condense n become mist)
• sprinkler system(sketch ekg 1 and explain)
• sketch starting air v/v, operation, maintenance n starting line explosion
• LO purifier starting procedure
• Explain 2nd explosion
• sketch and explain co2 fixed fire fighting medium..
• how to lubricate crosshead..
• explain types of heat exchanger..flow..
• as watchkeeper..wat are the checks carried out on purifier..
• safety devices fitted to air compressor...
• taking over,during watch
• log book
• starting air line,(sketch,explain)
• starting air line explosion
• paralleling generator
• fix foam(sketch,explain)
• marpol annexes explanation
• sketch cross section cylinder liner
• sketch and label ship construction
• what are the causes cylinder liner wear, must include sulphur content.
• statutory certificate under solas.
• procedure bottom and scum blow down.
• foam system.
• -crankcase explosion
• -crankcase relief door
• -scavenge fire
• -taking over & handing over
• -marpol annex 1 to 6
• -preparation b4 departure
• -co2 flooding
• -blowdown gauge glass
• -switchboard safety devices
• starting air line xplosion
• power card,sketch n xplain
• procedure 2 overhaul piston
• type of scavenge
• type of steering gear,sketch 4ram wit telemotor transmitter
• starting n reversing engine with sketch n xplain
• xplain priming,foaming,carry over n water hammering
• generator parallel from generator start up procedure
• air comp n air bottle safety feature
• fuel injector sketch n xplain
• sprinkler system
• follow up and non follow up for sg
• main switchboard safety
• m/e trips
• seca area
• marpo
l• boiler water treatment
• explain water hammering,foaming,carry over
• enclosed space
• procedure bunkering
• state types of boiler safety v/v n function
• function of viscotherm n bus tie (ask devi)
• type of your engine why 2 stroke
• what r the maintenance to be carried on the ME to keep it in good condition.
• c/case explosion.. causes..how to prevent?
• Sketch smoke tube boiler+all fittings.. n explain the operation..n how to start frm cold?
• gauge glass bow through..
• prepare ME for departure...( mention all the safety procedure before proceed)
• synchronize n do load sharing (manual)?
• what will happen if u close circuit breaker and the synchroscope rotating anticlockwise?
• how to measure the engine power explain all the possible methods..
• regulation for gauge glass
• boiler construction
• mountings and their function
• function shut-off ball v/v
• m/e hfo bunker
• purifying and serv to m/e
• function of buffer tk/mixing column
• safety devices fitted on m/e
• how scum produced
• Sketch boiler feed system n explain...
• maintenance on boiler
• ask about dumping
• Sketch boiler steam system n xplain
• function of cascade tank
• other name of cascade tank
• Sketch ME LO system n xplain the system
• type of sump tank n xplain it principle
• Crankcase explosion
• jacket water treatment
• fction daerating tank
• what cause high ph n chloride
• what is diffrnt ph n alkalnty n allowable limit
• Fresh water generator
• describe term vacuum,evaporation,condesate n distillate
• brine ejector working principle
• salinometer detection
• Steam and jacket FWG
• Feed water system boiler
• feed check vlve working principle
• what type chmcal for dosing
• Condensate system
• dumping system
• economizer running independent high pressure
• Inert gas system,sketch system
• stachiometric principle
• your last vessel and talk about it.
• boiler, what type, sketch with mountings, explain briefly about the flow
• rising the steam from cold and checks that you carry out during watch in boiler.
• t/c surging, causes, indication, how to prevent it
• what to do when e/r flooding
• location of bow thruster and why it is high voltage.
• what to check on pumps during rounding
• safety valve tests
• Procedures if C/E has told u to inspect F.W tk ( Enclosed space procedures and wt to inspect)
• What STCW stress on and purpose?
• what to check on ME while it is running as a watchkeeper?
• Surging causes.
• OWS regulations
• Explain steering gear test procedure
• How to keep all machinery in good working condition
• How to shut down boiler for long period
• UMS regulation and how to go on UMS
• why roof firing in bolier n wht advantages steam assisted jet pressure burner having compared to other type burners?
• bilge line n ows regulation and its procedure to xplain.......?
• Draw Main engine jacket water system and explain?
• Why cooling medium enters from bottom of the liner?
• Purpose of expansion tank, de-aerator and preheater in the cooling system?
• Fresh water generator draw and explain the principle of operation?
• Starting up and stopping procedures for FWG?
• Maintenance I did onboard regarding FWG? Checks before boxing back? Demister? Ans must include safety?
• Boiler feed water system sketch and explain?
• How the feed rate is regulated? Ans must include both, auxiliary and main feed pump operation... Also why boiler water circulating pump must be running at all times??
• What could be the reasons for oil traces in observation chamber of cascade tank? How wld you find out dat steam tracing, for a particular tank is leaking? Action?
• about last vessel
• boiler construction,operation,water test, and survey
• prepare m/e
• Ums
• starting air line
• fuel oil system
• action when scavenge fire occur
• bunker procedure
• difference between dry and wet sump tank.
• explain the purpose of intercooler in air compressor
• draw air compressor
• maintence in air compressor(include ur ans with bumping clearance)
• safety mechanism fitted in air compressor (he wnt 2 hear unloader)
• how can sea water enter the boiler feed water line(coolers)
• why do we have an exhaust gas boiler
• ig system
• purpose of deck seal
• why is ig purging and venting
FariS Paklong.
Exminer: En. Hasrol.
10/11/11 oral question improved high lift safety valve boiler diagram boiler mounting LSA scavenge fire( heat dari blow pass) diff. between fusible plug and relief valve fitted on air bottle CO2 sys. blow through gauge glass
Yusmie Bin Yusof
Examiner: En. Rahman.
air starting system(sketch&describe)
air starting explosion(cause and safety)
crankcase expo(cause.safety.sign->tekankan pasai unnormal heat n oil mistdetector alarm) dia akan senyum power card sketch and draw.
.dia nk sketch and namakan fix fire fighting-dia soh pilih dua-aku boh auto sprinkler ngn co2 boilerwater treatment...foaming..carryover..watter hammering start genset synchro stop genset igs boiler fitting..blow down sightglass..blow down..
compressor working principle+safety(dia nk unloader ngn bursting disc ) 4s timing diagram hand over watch steering gear lo system on ur ship
Eqmal Salleh.
Examiner: haji ramli.
Question. Sketch safety valve.
Air starting system. Direct panjangkn cerita smpai berlaku air starting explosion.
Steering gear regulation solas
How to release co2 system. Emergency power supply for fire fighting. Package siap sketch fire pump+regulation.
Smbung lg dgn foam fire fighting.
Lub oil for liners.
Mcm mana berlaku worn liners ni..
Wanie Zainal Abidin.
examiner : mr. basir
Question : 1. Imo regulation (SOLAS,MARPOL,STCW,LOADLINE,TONNAGE)
2. Bilge System+OWS working principle (sketch)
3. Marpol 73/78 (how u applied onboard?)
4. Sketch boiler construction+mounting+feed line system (ur own ship)
5. Procedure shutting down/isolate boiler for maintenance
6. Procedure hose down boiler (*include the enclosed space)
7. Scavenge fire,how?indication?prevent?
8. Boiler water test and treatment
9. During watchkeeping what u monitor for boiler?
10. How u test safety v/v onboard ship
11. Prepare ME for departure
12. Indicator diagram. *sketch and explain and how u took the ME performance?
Bahrin SAUFi.
Examiner: En. Farid.
Soklan oral...construction of boiler.. Boiler mounting Bole x safety valve di pasang satu pada steam drum. Meaning of boiler mounting Annex berapa dlam solas mengatakn boleh memasang satu safety valve. Lubrication system of main engine.. Adakah L.o system yg digunakan pada m.e dan cylinder lubrication sama.. Last crank case explotion.
Tabrani Inchiban
Examiner : mr hasrol
Question : 1. marpol
2. co2 sys
3. air starting xplosion
4. boiler mounting
5. diffrent between relief vlv n fusible plug
Hazim Subki.
Examiner : Mr. Rahman
Question; 1. State what is the Main Engine Crankcase Explosion,cause,symtoms and prevention. 2. State what is scavenge air fire,cause,symtoms and prevention. 3. Sketch & explain Main Engine Indicator Cards. (including formula calculation) 4. What is Boiler Water Treatment. 5. Sketch & describe CO2 Flooding System. 6. Why need to blowdown water gauge glass. How to blowdown? 7. Explain 6 annex in MARPOL. 8. State what is carry over,priming,foaming,water hammering and furnace purging. 9. How to parallel two running generator. 10. State the safety features at air compressor and air receiver. 11. How air starting line explosion happen. 12. What is enclosed space & procedure to enter. 13. Sketch the Main Engine LO System.
Azmirul Azmi.Examiner: En Farid
Oral examination question 15/12/11 -boiler diagram including boiler mounting -recirculate line from service and back to steam drum(feed water line) -water test boiler type, procedure, formula, purpose, cause -air starting system(sketch,describe in each component, working procedure) -air starting explosion(sketch and how it happend)
Wan Ahmad Safwan
Examiner : hazrol rizal
1) skecth distribution board and explain
2) co2 system skecth and explain procedure
3) fire pump requirement solas
4) different between fusible plug and relief valve on air bottle and explain
5) starting air line explosion skecth and explain
6) ANNEX 1-8 and explain sikit2 je.
7) skecth fire fighting line system on vessel
Hazlami Lamino
examiner : haji mohamad basir bin haji wakil ahmad
soklan :
1)air starting system...cite smpai starting explosion...
2)boiler construction...ak lukis yg D-type pnye...water tube...
3)procedure warm up main engine...
4)crankcase explosion...
5)starting boiler from cool...
6)hand over watch...
7)blow down gauge glass...
8)familiarization onboard...
Nelson
Examiner: Haji Mohamad Basir
Soalan :
1)Sketch boiler construction
2)Explain boiler mounting and safety devices
3)Air starting system sketch
4)Air starting explosion and safety devices on air system
5)Scavenge Fire,prevent,occurs
6)Marpol 1-8 explain
7)Sketch Boiler water side glass
8)Blowdown boiler Side glass procedure
Sharmannand Ravi
19/03/2012soalan yg aku kena dgn MR HAJI BASIR
-dia check blue book dgn all the assignment
-what do you do when you get onboard ship( familiarization) pls explain a-z from the moment you sign onboard the vessel. all about safety.(including MARPOL ISPS SOLAS STCW FFA@LSA)
-sketch and explain boiler onboard ur vessel. including boiler feed water diagram
-boiler water test.
-fire boiler from cold.
-boiler inspection( enclosed space entry)
-during watch keeping what do you control in boiler....study everything about boiler
-sketch air starting diagram, with the mountings
-air starting explosion
-mountings fitted on air bottle( fusible plug @ relief v/v)
-as an engineer what duty you will perform onboard?
- how to prevent air starting explosion
- how do you carry out maintenance onboard.
• 2s ngan 4s timing diagram
• m/e lo system
• boiler gauge glass blow down
• scavenge fire
• prepare m/e
• start boiler from cold
• stuffing box sketching and how its works
•t/c crosscut and explain system
• list 5 international convention with year (stcw.marpol,solas,load line, convention on tonnage measurement 69)
• basic requirement b4 going on board (list all modular courses)
• safety vv full bore (sketch n explain n nt need d full thing.vv seat area sketching good enough)
• t/c(sketch n explain system)
• t/c lubrication line
• boiler blowdown procedure (gauge glass, bottom, scum)
• m/e prep
• taking over watch
• c/case explosion (how happen and how to avoid.how vapour condense n become mist)
• sprinkler system(sketch ekg 1 and explain)
• sketch starting air v/v, operation, maintenance n starting line explosion
• LO purifier starting procedure
• Explain 2nd explosion
• sketch and explain co2 fixed fire fighting medium..
• how to lubricate crosshead..
• explain types of heat exchanger..flow..
• as watchkeeper..wat are the checks carried out on purifier..
• safety devices fitted to air compressor...
• taking over,during watch
• log book
• starting air line,(sketch,explain)
• starting air line explosion
• paralleling generator
• fix foam(sketch,explain)
• marpol annexes explanation
• sketch cross section cylinder liner
• sketch and label ship construction
• what are the causes cylinder liner wear, must include sulphur content.
• statutory certificate under solas.
• procedure bottom and scum blow down.
• foam system.
• -crankcase explosion
• -crankcase relief door
• -scavenge fire
• -taking over & handing over
• -marpol annex 1 to 6
• -preparation b4 departure
• -co2 flooding
• -blowdown gauge glass
• -switchboard safety devices
• starting air line xplosion
• power card,sketch n xplain
• procedure 2 overhaul piston
• type of scavenge
• type of steering gear,sketch 4ram wit telemotor transmitter
• starting n reversing engine with sketch n xplain
• xplain priming,foaming,carry over n water hammering
• generator parallel from generator start up procedure
• air comp n air bottle safety feature
• fuel injector sketch n xplain
• sprinkler system
• follow up and non follow up for sg
• main switchboard safety
• m/e trips
• seca area
• marpo
l• boiler water treatment
• explain water hammering,foaming,carry over
• enclosed space
• procedure bunkering
• state types of boiler safety v/v n function
• function of viscotherm n bus tie (ask devi)
• type of your engine why 2 stroke
• what r the maintenance to be carried on the ME to keep it in good condition.
• c/case explosion.. causes..how to prevent?
• Sketch smoke tube boiler+all fittings.. n explain the operation..n how to start frm cold?
• gauge glass bow through..
• prepare ME for departure...( mention all the safety procedure before proceed)
• synchronize n do load sharing (manual)?
• what will happen if u close circuit breaker and the synchroscope rotating anticlockwise?
• how to measure the engine power explain all the possible methods..
• regulation for gauge glass
• boiler construction
• mountings and their function
• function shut-off ball v/v
• m/e hfo bunker
• purifying and serv to m/e
• function of buffer tk/mixing column
• safety devices fitted on m/e
• how scum produced
• Sketch boiler feed system n explain...
• maintenance on boiler
• ask about dumping
• Sketch boiler steam system n xplain
• function of cascade tank
• other name of cascade tank
• Sketch ME LO system n xplain the system
• type of sump tank n xplain it principle
• Crankcase explosion
• jacket water treatment
• fction daerating tank
• what cause high ph n chloride
• what is diffrnt ph n alkalnty n allowable limit
• Fresh water generator
• describe term vacuum,evaporation,condesate n distillate
• brine ejector working principle
• salinometer detection
• Steam and jacket FWG
• Feed water system boiler
• feed check vlve working principle
• what type chmcal for dosing
• Condensate system
• dumping system
• economizer running independent high pressure
• Inert gas system,sketch system
• stachiometric principle
• your last vessel and talk about it.
• boiler, what type, sketch with mountings, explain briefly about the flow
• rising the steam from cold and checks that you carry out during watch in boiler.
• t/c surging, causes, indication, how to prevent it
• what to do when e/r flooding
• location of bow thruster and why it is high voltage.
• what to check on pumps during rounding
• safety valve tests
• Procedures if C/E has told u to inspect F.W tk ( Enclosed space procedures and wt to inspect)
• What STCW stress on and purpose?
• what to check on ME while it is running as a watchkeeper?
• Surging causes.
• OWS regulations
• Explain steering gear test procedure
• How to keep all machinery in good working condition
• How to shut down boiler for long period
• UMS regulation and how to go on UMS
• why roof firing in bolier n wht advantages steam assisted jet pressure burner having compared to other type burners?
• bilge line n ows regulation and its procedure to xplain.......?
• Draw Main engine jacket water system and explain?
• Why cooling medium enters from bottom of the liner?
• Purpose of expansion tank, de-aerator and preheater in the cooling system?
• Fresh water generator draw and explain the principle of operation?
• Starting up and stopping procedures for FWG?
• Maintenance I did onboard regarding FWG? Checks before boxing back? Demister? Ans must include safety?
• Boiler feed water system sketch and explain?
• How the feed rate is regulated? Ans must include both, auxiliary and main feed pump operation... Also why boiler water circulating pump must be running at all times??
• What could be the reasons for oil traces in observation chamber of cascade tank? How wld you find out dat steam tracing, for a particular tank is leaking? Action?
• about last vessel
• boiler construction,operation,water test, and survey
• prepare m/e
• Ums
• starting air line
• fuel oil system
• action when scavenge fire occur
• bunker procedure
• difference between dry and wet sump tank.
• explain the purpose of intercooler in air compressor
• draw air compressor
• maintence in air compressor(include ur ans with bumping clearance)
• safety mechanism fitted in air compressor (he wnt 2 hear unloader)
• how can sea water enter the boiler feed water line(coolers)
• why do we have an exhaust gas boiler
• ig system
• purpose of deck seal
• why is ig purging and venting
FariS Paklong.
Exminer: En. Hasrol.
10/11/11 oral question improved high lift safety valve boiler diagram boiler mounting LSA scavenge fire( heat dari blow pass) diff. between fusible plug and relief valve fitted on air bottle CO2 sys. blow through gauge glass
Yusmie Bin Yusof
Examiner: En. Rahman.
air starting system(sketch&describe)
air starting explosion(cause and safety)
crankcase expo(cause.safety.sign->tekankan pasai unnormal heat n oil mistdetector alarm) dia akan senyum power card sketch and draw.
.dia nk sketch and namakan fix fire fighting-dia soh pilih dua-aku boh auto sprinkler ngn co2 boilerwater treatment...foaming..carryover..watter hammering start genset synchro stop genset igs boiler fitting..blow down sightglass..blow down..
compressor working principle+safety(dia nk unloader ngn bursting disc ) 4s timing diagram hand over watch steering gear lo system on ur ship
Eqmal Salleh.
Examiner: haji ramli.
Question. Sketch safety valve.
Air starting system. Direct panjangkn cerita smpai berlaku air starting explosion.
Steering gear regulation solas
How to release co2 system. Emergency power supply for fire fighting. Package siap sketch fire pump+regulation.
Smbung lg dgn foam fire fighting.
Lub oil for liners.
Mcm mana berlaku worn liners ni..
Wanie Zainal Abidin.
examiner : mr. basir
Question : 1. Imo regulation (SOLAS,MARPOL,STCW,LOADLINE,TONNAGE)
2. Bilge System+OWS working principle (sketch)
3. Marpol 73/78 (how u applied onboard?)
4. Sketch boiler construction+mounting+feed line system (ur own ship)
5. Procedure shutting down/isolate boiler for maintenance
6. Procedure hose down boiler (*include the enclosed space)
7. Scavenge fire,how?indication?prevent?
8. Boiler water test and treatment
9. During watchkeeping what u monitor for boiler?
10. How u test safety v/v onboard ship
11. Prepare ME for departure
12. Indicator diagram. *sketch and explain and how u took the ME performance?
Bahrin SAUFi.
Examiner: En. Farid.
Soklan oral...construction of boiler.. Boiler mounting Bole x safety valve di pasang satu pada steam drum. Meaning of boiler mounting Annex berapa dlam solas mengatakn boleh memasang satu safety valve. Lubrication system of main engine.. Adakah L.o system yg digunakan pada m.e dan cylinder lubrication sama.. Last crank case explotion.
Tabrani Inchiban
Examiner : mr hasrol
Question : 1. marpol
2. co2 sys
3. air starting xplosion
4. boiler mounting
5. diffrent between relief vlv n fusible plug
Hazim Subki.
Examiner : Mr. Rahman
Question; 1. State what is the Main Engine Crankcase Explosion,cause,symtoms and prevention. 2. State what is scavenge air fire,cause,symtoms and prevention. 3. Sketch & explain Main Engine Indicator Cards. (including formula calculation) 4. What is Boiler Water Treatment. 5. Sketch & describe CO2 Flooding System. 6. Why need to blowdown water gauge glass. How to blowdown? 7. Explain 6 annex in MARPOL. 8. State what is carry over,priming,foaming,water hammering and furnace purging. 9. How to parallel two running generator. 10. State the safety features at air compressor and air receiver. 11. How air starting line explosion happen. 12. What is enclosed space & procedure to enter. 13. Sketch the Main Engine LO System.
Azmirul Azmi.Examiner: En Farid
Oral examination question 15/12/11 -boiler diagram including boiler mounting -recirculate line from service and back to steam drum(feed water line) -water test boiler type, procedure, formula, purpose, cause -air starting system(sketch,describe in each component, working procedure) -air starting explosion(sketch and how it happend)
Wan Ahmad Safwan
Examiner : hazrol rizal
1) skecth distribution board and explain
2) co2 system skecth and explain procedure
3) fire pump requirement solas
4) different between fusible plug and relief valve on air bottle and explain
5) starting air line explosion skecth and explain
6) ANNEX 1-8 and explain sikit2 je.
7) skecth fire fighting line system on vessel
Hazlami Lamino
examiner : haji mohamad basir bin haji wakil ahmad
soklan :
1)air starting system...cite smpai starting explosion...
2)boiler construction...ak lukis yg D-type pnye...water tube...
3)procedure warm up main engine...
4)crankcase explosion...
5)starting boiler from cool...
6)hand over watch...
7)blow down gauge glass...
8)familiarization onboard...
Nelson
Examiner: Haji Mohamad Basir
Soalan :
1)Sketch boiler construction
2)Explain boiler mounting and safety devices
3)Air starting system sketch
4)Air starting explosion and safety devices on air system
5)Scavenge Fire,prevent,occurs
6)Marpol 1-8 explain
7)Sketch Boiler water side glass
8)Blowdown boiler Side glass procedure
Sharmannand Ravi
19/03/2012soalan yg aku kena dgn MR HAJI BASIR
-dia check blue book dgn all the assignment
-what do you do when you get onboard ship( familiarization) pls explain a-z from the moment you sign onboard the vessel. all about safety.(including MARPOL ISPS SOLAS STCW FFA@LSA)
-sketch and explain boiler onboard ur vessel. including boiler feed water diagram
-boiler water test.
-fire boiler from cold.
-boiler inspection( enclosed space entry)
-during watch keeping what do you control in boiler....study everything about boiler
-sketch air starting diagram, with the mountings
-air starting explosion
-mountings fitted on air bottle( fusible plug @ relief v/v)
-as an engineer what duty you will perform onboard?
- how to prevent air starting explosion
- how do you carry out maintenance onboard.
