CoC Oral Exam Questions Bank

By Maklub Al Mostofa

Maritime Regulations and Survey

    1. Describe Safety construction survey and items to be surveyed.
    2. Describe Load line survey. Purpose of load line survey. Why do we need load line certificate?
    3. Describe LOAD Line convention.
    4. Why load line mark is at the mid ship/ how to calculate load line for a ship?(details)
    5. Details about Safety equipment survey
    6. How many certificates to be carried on board?
    7. Describe Life boat regulation?
    8. Describe MLC 2006 details
    9. Describe Ballast water regulation.
    10. Describe SOLAS chapters and new amendment
    12. All the chapters of annex vi, details of NOx , SOx limit, tyre ,EEOI ,EEDI, SEEMP…….
    13. What is HSSC?
    14. ESP(Enhanced survey program)
    15. Regulation for vent pipe, sounding pipe
    16. Preparation for PSC inspection as C/E?

  1. How many annexes in MARPOL?
  2. Details of each annex: oil discharge procedure from ER and special area of annex 1. Operation of OWS?
  3. What is siphon tube? What is vacuum breaker?
  4. What are the data recorded in OWS monitor?
  5. How oil and water level sensor works in OWS?
  6. How to put entry in ORB? What is action in case of wrong entry? How many people fill up and sign it?
  7. What is garbage discharge procedure? How to put entry in GRB?
  8. What is annex IV?
  9. What is annex VI?
  10. What is survey? How many types of survey?
  11. Details about the surveys and interval, survey items, validity of the certificates.
  12. What is enhanced survey program?
  13. What is harmonized system of survey?
  14. Describe Safety equipment survey and their items?
  15. Describe Safety construction survey and their items?
  16. What is under water survey?
  17. What is port state, flag state?
  18. What is classification society and what is the purpose of it?
  19. What is the difference between classification survey and statutory survey?

nstrumentation and Control

  1. What is PID control? If PID controller fails what is your action?
  2. Cascade control and explanation.
  3. Why 2 element control used in boiler water level control
  4. Fail safe and fail set with drawing
  5. Cascade control and description.

Fire and safety

  1. Types of fire and use of fire extinguisher, testing procedure, survey interval, testing pressure and details
  2. Describe the Emergency fire pump regulations.
  3. What are the Regulations for life boat engine?
  4. Describe On load and off load mechanism.
  5. Describe Life boat launching procedure.
  6. What is HRU? Working principle.
  7. Describe the Brakes of life boat davit.
  8. Foam system working principle and expansion rates of foam’
  9. Sprinkler system and testing procedure
  10. Sketch and describe Oxygen analyzer, explosimeter.
  11. Exi,Exd,exp,….. How exd and exp constructed.
  12. Explain LEL and UFL with graph.
  13. State Breathing apparatus regulation and checking system
  14. SOLAS regulation for IG system and description of the system
  15. State Carbon di oxide flooding regulation, drawing and procedure.
  16. What is TLV?
  17. What is risk assessment? How to eliminate risk?

Steering Gear:

  1. What are Steering gear SOLAS regulations?
  2. State Follow up and non follow up steering.
  3. What are the Safeties of steering gear?
  4. What are the Stops of steering gear
  5. What is Rudder carrier bearing?
  6. Steering gear sluggish operation
  7. What is hunting gear? State the functions.
  8. Emergency steering procedure, drill interval.
  9. Describe 100% and 50% torque.
  10. Describe Steering gear arrangement from bridge to steering flat.
  11. Describe Emergency steering procedure?

Shafting and Stern Tube:

  1. What is Pilgrim nut? Describe working principle.
  2. What is Muff coupling? Describe working principle.
  3. Draw and describe Thrust block
  4. Describe Tail shaft withdrawal procedure
  5. Describe Intermediate shaft with drawl procedure
  6. Describe Stern tube drawing, details of drawing .enlarge drawing of each lip seal.
  7. What is action in case of oil leakage?
  8. Propeller removal and inspection. Propeller caviatation,
  9. How much wear down allowed in propeller shaft? Corrosion on the conical part of the propeller shaft what you do at dry dock give your opinion.
  10. Purpose of shat grounding?


  1. Procedure and calculation. Sampling and reservation procedure as per rule?
  2. FO properties and limit of the elements in FO .BDN content. FO handling and purification.
  3. What is VCF and WCF. Why they necessary?
  4. What is ISO 8217?
  5. What is Specific fuel consumption?
  6. Definition of : flash point, fire point, pour point,  cal  value,  CCAI value, octane number ,cetene  number


  1. Difference between boilers
  2. Boiler survey types  and interval
  3. Boiler survey preparation and checks
  4. Safety valve types and difference
  5. Safety valve setting( both EGB and boiler)
  6. Accumulation test ,
  7. Back fire, foaming, priming
  8. Types of gauge glass and drawing
  9. Mountings and boiler safety, alarms and trips
  10. Which safety valve set at higher pressure boiler safety valve or EGB safety valve? Why?
  11. Different types of boiler tubes and their details?
  12. Boiler tube plug/blank
  13. How to detect boiler tube is leaking
  14. What is pH. What is the range? Why 14 is the maximum pH value?
  15. What is leap clearance?
  16. What are differences between different types of safety valve?
  17. What are the safeties of gauge glass?
  18. What is acid corrosion and hydrogen corrosion?
  19. What is caustic hide out?
  21. Scale formation in boiler and treatment.
  22. Boiler chemicals used and their limits
  23. Boiler water test procedure
  24. What is soft water? What is hard water?
  25. What is coagulant?
  26. Details about Soot fire, uptake fire


  1. Types of turbocharger
  2. Function of nozzle ring, labyrinth seals, diffuser, and inducer.
  3. Turbocharger vibration and noise. Cause and remedial action.
  4. What is T/C surging? State cause and remedial action.
  5. Describe T/C cut off procedure. Why u may need to that? What other pre-caution u need to take?
  6. Sate Solid wash procedure.


  1. Details about Principle dimension of ship .
  2. How to calculate ship’s cargo carrying capacity?
  3. Details of the terms: GRT,NRT,DWT,DISPLACEMENT,
  4. Types of bulkhead and their construction.
  5. Forward arrangement description and drawing
  6. Stern arrangement description and drawing
  7. Why load line marking is at the mid ship? Details of load line marking.
  8. How u will determine free board of ship?
  9. Draw and describe Mid ship section of bulk carrier.
  10. What types of stress a ship face?
  11. What is 6 degree motion of ship?
  12.  What are the functions of Bulbous bow?
  13. What are the Functions of bow thruster?
  14. Construction and position of Collision bulkhead, water tight bulkhead, aft peak bulkhead, fore peak bulkhead.
  15. State Stability, Equilibrium, free surface effect.
  16. Definitions :Centre of buoyancy ,Centre of flotation , Metacentre , Metancentric height, Righting lever , Angle of loll
  17. How many types of rudder? Details of them.
  18. Rudder stops and rudder droop.
  19. What is rudder stalling?
  20. What is jumping clearance?
  21. What is pintle clearance?


  1. What is a battery, how and where it supplies current on board a ship?
  2. What are the factors for battery & room maintenance?
  3. Name the machinery of using 440 V, 220 V, 110 Volt and 24 V current.
  4. What is single phasing, why it is occurred, what are the effects and preventive measure
  5. What are the Switch Board Safety Devices?
  6. What is Synchroscope?
  7. How many methods to synchronize?
  8. What is stroboscopic effect?
  9. Describe Emergency Generator regulation ,starting procedure and its maintenance:
  10. Difference between Synchronous Motor and Induction Motor
  11. Remedial action when generator fails to excite.
  12. What is ur action When Electrical Machine is flooded with SW?
  13. Short, open and grounded circuits,
  14. What is dash pot, SCR, Transistor, DIODE, Transducer, TRSNSDUCER, Rectifier
  15. Describe Brushless alternator and excitation system
  16. Describe Static excitation system
  17. Describe  A/C motor working principle.
  18. Describe Motor safeties and their working principle
  19. Describe Auto transformer with  drawing and details
  20. What is Earth fault and detection system
  21. Describe Insulated and earthed neutral system, their advantage and disadvantage.
  22. DOL and Star-delta system of motor starting.
  23. What is word leonard system? Describe with aid of sketch.


  1. Describe the types of crankshaft. Stress on crankshaft. Slippage of crankshaft cause and action to be taken.
  2. How to take crank shaft deflection? How u will evaluate the readings?
  3. How to extract liner? How u will understand the liner life time is nearing to an end? Name the materials of liner.
  4. Describe the Liner lubrication system? What is Alfa lubrication system?
  5. Describe x-head lubrication system.
  6. How to run engine with one unit cut off?
  7. How to run engine with one unit hanging?
  8. Chain drives inspection and how to adjust chain elongation. What is the maximum limit of chain elongation?
  9. Types of Engine vibration?  What are the types of stress on engine? What is critical speed? What is barred range of speed? What is vibration damper? How vibration damper works? What is bracing and why they are fitted?
  10. What are forces act on bed plate?
  11. Tightness checking procedure of tie rod? How to remove broken tie rod from engine?
  12. How timing is adjusted in hydraulic type exhaust valve?
  13. How liner is lubricated in 4 stroke and 2 stroke engines?
  14. Describe main engine starting and reversing procedure. What is crash manoeuvring? What is lost motion and gain motion?
  15. What is speed droop? How to adjust speed droop? What is speed sensing and load sensing governor? What is governor booster?
  16. What is isochronous governor? What is load sensing governor?
  1. How many types of fuel pump used in ship, draw and describe. How to check fuel pump timing of each type. Working principle of each type fuel pump
  2. What is erosion plug of fuel pump? How you will check plunger and barrel during overhauling? What is puncture valve? What is fuel pump lead?
  3. What is VIT? Difference between VIT & SUPER VIT?
  4. How to take main bearing clearance, big end bearing clearance, cross head bearing clearance?
  5. How to take thrust bearing clearance? How thrust bearing lubrication is achieved?
  6. Difference between thin sell and thick shell bearing?
  7. Hoe to calculate Main engine performance? How many types of indicator cards and how to evaluate?
  8. Describe propeller curve.
  9. What is your action in case of grounding?
  10. What is the cause of scavenge fire? What are the actions to be taken?
  11. Describe crankcase fire, cause and action to be taken.
  12. Describe starting air line explosion, its cause and action to be taken.
  13. What pressure maintained in crankcase?
  14. What is your action in case of OMD alarm?
  15. What are the safety devices in Crank Case
  16. What are the safeties of main engine?
  17. Main engine is not starting what is ur action?
  18. What is dead spot of engine?
  19. During manoeuvring u noticed one of the starting air valve is leaking, what is ur action?
  20. During manoeuvring u noticed one of the exhaust valve is badly noisy, what is ur action.
  21. Engine turns on air but fails in fuel what are the reasons?
  22. Engine fails to turns on air what are the reasons?
  23. All unit exhaust temperature high. What may be the reasons?
  24. One unit temperature high what may be the reasons?
  25. How to take A/E performance?
  26. After overhauling A/E leakage is found from shaft seal. What is the reason?
  27. A/E LO consumption has been increased, what are the reasons?


  1. How many types of lubrication?
  2. Definition: TAN, TBN , SAN. Viscosity,
  3. What is microbial degradation? What is the remedial action?
  4. What is grease?
  5. What is the difference between cylinder and crankcase LO?
  6. Details about Onboard LO testing procedure


  1. What are GWP and ODP?
  2. What is TEV? What is equalizing?
  3. How to recharge refrigerant? How to record if needed?
  4. How to detect leakage?
  5. What is sub cooling .what is super heat.


  1. Describe normalizing, annealing and nitriding, case hardening, fatigue failure, creep, yield point,
  2. What is welding, brazing, soldering
  3. What is TIG,MIG
  4. What is white metal?

Name the materials  and composition of the followings : propeller, hull, rudder , bronze, brass,  Monel Metal, Gun Metal,  Bell Metal,  Bronze, Phosphor Bronze, German Silver , Manganese Bronze,  Brass

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