Category Archives: Question & Answer

Duties and Responsibilities of a 4th Engineer

Fourth engineer is the officer in charge of engineering watch on board and maintains engine room watch independently. He shall be responsible for the safe and proper operation of machinery plants, and for the duties prescribed in STCW 2010 A-III/1. … Continue reading

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F.O. Purifier

What is purifier and why we use it on board? As the name implies, Purifier purifies fuel oil used on board. It is a machine that separates impurities from fuel oil. Impurities can be both solid and liquid/water. Why there … Continue reading

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Onboard Lubricating Oil Tests

(By Kamal Hossain, Chief Engineer) (a) Explain how lubricating oil can be tested onboard. Answer: L.O can be tested on board by using Maker’s supplied test kit , which can give the result whether it is safe for further use … Continue reading

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Boiler Water Tests

(By Kamal Hossain, Chief Engineer) Q. (a) Explain why regular testing of water in auxiliary boiler is advisable (b) How to take correct sample (c) Discuss what factors are necessary when measured value differ appreciably from desired value in each … Continue reading

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Summary of Steering Gear Regulations & Requirements

(By Kamal Hossain, Chief Engineer) SOLAS  REGULATION & REQUIREMENTS FOR STEERING GEAR Steering gear compartment must be separated from machinery spaces and readily assessable. Every ship shall be provided with main steering gear and auxiliary steering gear. The failure of … Continue reading

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UMS System Failure

(By Kamal Hossain, Chief Engineer) It is complete failure of the UMS, bridge control and data logging system has failed and the main engine is needed to run on manual control and monitoring. (a) State with reasons six main items … Continue reading

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Effects of Impurities in Fuel Oil

Q. Write brief notes on the adverse effects that a fuel containing high value of the following may cause: (a) Viscosity (b) Density (c) Sulphur (d) Corodson Carbon Residue (e) Asphaltene (f) Vanadium & Sodium (g) Ash (h) Water (By … Continue reading

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Boiler Water Treatment

By Maklub Al Mostofa Scale formation and corrosion are the main two factors that determine the efficiency of the internal parts and as well as lifetime of the boiler. Badly corroded and scaled boiler can fail within very short time. … Continue reading

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Oil Record Book (Questions & Answers)

By Maklub Al Mostofa QUESTIONS: How to put entry in ORB? What is action in case of wrong entry? How many people fill up and sign it? What is your action if an entry is missed? What is your action … Continue reading

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CoC Oral Exam Questions Bank

By Maklub Al Mostofa Maritime Regulations and Survey Describe Safety construction survey and items to be surveyed. Describe Load line survey. Purpose of load line survey. Why do we need load line certificate? Describe LOAD Line convention. Why load line mark … Continue reading

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Planning & Preparation of Dry Dock as a Chief Engineer

Image Credit:  www.rbrodarstvo.com Preparations: Dry docking survey is to be done every 2 ½ years interval , 2 times in 5 each year cycle , called annual docking and special docking survey. Special survey is carried out every 5 years … Continue reading

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CoC Oral Exam Preparation (Part – 20): OWS & Regulations

MARPOL Regulations of Discharging Machinery Bilge into the sea: The rules and Regulations that govern the operation of an Oily Water Separator are under MARPOL  Annex I: “Prevention of pollution by oil”. Regulation 14: Oil Filtering Equipment Vessels above 400 GT … Continue reading

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CoC Oral Exam Preparation (Part – 19): Engine Room Watch Keeping

Watch Keeping in Engine Room: Image Credit: www.jamstec.go.jp A. Handing over a watch: Engineers on ships perform their duties in rotational shifts, each having fixed and equal number of hours. This work shift, also known as a watch, needs to … Continue reading

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CoC Oral Exam Preparation (Part – 18): Electrical Miscellaneous

Servicing a motor effected/washed by seawater: Cut out power supply by circuit breaker & taking out fuse. Mark & disconnect supply wire. Took Megger reading & recorded. Take out the motor, open up & dismantle. (Make sure marking on both … Continue reading

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CoC Oral Exam Preparation (Part – 17): Boiler Safety Valve

Boiler Safety Valves protect the boiler from over pressurisation. As per the requirements, at least two safety valves should be fitted to the boiler and both are mounted on a common manifold with a single connection to the boiler. Boiler with … Continue reading

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CoC Oral Exam Preparation (Part – 16): CO2 Flooding System

 Requirements of CO2 Room: In CO2 flooding system, carbon dioxide bottles are placed in a separate room. The requirements for location, accessibility, use and ventilation of CO2 storage spaces as per IMO are: Spaces for storage of cylinders or tanks … Continue reading

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CoC Oral Exam Preparation: (Part – 15): Fire & Safety

Fire Hose: At least one fire hose for each of the hydrants and hose shall be used only for extinguishing fires and testing purposes. (Passenger Ship) One for each 30m length of ship and one spare, but not less than … Continue reading

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CoC Oral Exam Preparation (Part – 14): Ship’s Certificates

Certificates onboard: 1.Certificate of Registry 2. International Tonnage Certificate 3. International Load Line Certificate 4. International Load Line Exemption Certificate 5. Certificates for Master, Officers and Ratings 6. Derating or Derating Exemption Certificate 7. International Oil Pollution Prevention Certificate 8. … Continue reading

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CoC Oral Exam Preparation (Part – 13): Entries of Important Documents

OIL RECORD BOOK: Entries to be made in Oil Record Book as per MARPOL Annex I Requirements: Oil Record Book: PART – 1 (MARPOL Annex I Regulation 17):  Entries: Ballasting or Cleaning of fuel oil tanks Discharge of dirty ballast … Continue reading

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CoC Oral Exam Preparation (Part – 12): Stern Tube

Image Credit: www.libramar.net Stern Tube: The stern tube is a hollow tube-like structure at the stern or rear part of the ship. A ship needs the propeller to drive it forward in water. The propeller, located outside the ship, needs to … Continue reading

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CoC Oral Exam Preparation (Part- 11): Propulsion Machinery

Image Credit: Wikipedia.org FUEL INJECTION TIMING Checking of fuel injection pump timing: Turn 1 piston to TDC at the beginning of firing stroke. Turn backward to a point, a little earlier than fuel injection point. Shut fuel supply to engine, … Continue reading

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CoC Oral Exam Preparation (Part-10): Ship Construction

Image Credit: wikipedia.org Definitions and Ship’s Dimensions Hull: The structural body of a ship including shell plating, framing, decks and bulkheads.  Afterbody : That portion of a ship’s hull abaft midships.  Forebody: That portion of a ship’s hull forward midships. … Continue reading

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CoC Oral Exam Preparation (Part – 9): Refrigeration & Air Conditioner

Image Credit: almaco.cc Refrigeration:  What is a Refrigerant? Refrigerants are used as working substances in a Refrigeration systems. Fluids suitable for refrigeration purposes can be classified into primary and secondary refrigerants. Primary refrigerants are those fluids, which are used directly … Continue reading

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CoC Oral Exam Preparation (Part – 8): Air Compressor

Air Compressor Image Credit: leelloyds.com Effects of leaking valves in Air Compressor: First Stage Suction: Reduce air delivery Reduce 2nd stage suction pressure Unload the compressor Increase running time. First Stage Delivery: Reduce air delivery Increase discharge temperature Less air … Continue reading

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Ventilation Arrangement for Hazardous Spaces in Engine Room

The following engine room spaces are very hazardous on-board the ship and therefore, a special ventilation arrangement should be provided for safe entry: (a) CO2 storage compartment (b) Battery room (c) Purifier flat (d) Refrigerating machinery space (e) Shaft tunnel … Continue reading

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CoC Oral Exam Preparation (Part-7) – Maritime Security

Image Credit: www.msecurity.ru When do the security measures come into force ? – 1st July, 2004. SOLAS amendments adopted in December 2002 : Chapter V: – Automated Identifications Systems(AIS) Chapter XI-1: -Ship identification number -Continuous Synopsis Record (CSR) Chapter XI-2: -Measures … Continue reading

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CoC Oral Exam Preparation (Part-6) – Boiler Operation & BW Treatment

Boiler : Boiler Automatic Burning System: 1. With correct water level, steam pressure transmitter initiates cut-in at about 1.0 bar below working pressure. 2. Steam pressure transmitter initiates Master Relay to allow ‘Air On’ signal to force draught fan. 3. … Continue reading

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CoC Oral Exam Preparation (Part- 5) – Boiler

Exhaust Gas Boilers: About 30% – 34% of Fuel Energy input to engine are discharged to Exhaust Gas, as Thermal Energy. This thermal energy is converted into useful work in Exhaust Gas Boiler. Cochran Exhaust Gas Boiler: 1. A double-pass, … Continue reading

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CoC Oral Exam Preparation (Part- 4) – Lub Oil & Fuel Oil

Image Credit: lube-oil.in Lubricating Oil Viscosity: 1. A measure of internal resistance to flow. 2. Viscosity of an oil changes with temperature, falling when temperature rises and vice versa. 3. For crankcase oil, viscosity is between 130 – 240 Sec. … Continue reading

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CoC Oral Exam Preparation (Part- 3) – Electrical

image credit: www.rchelectrical.co.uk Electrical Survey: Electrical equipment inspected and tested, during complete engine survey, at 4 years interval. Such a survey is prescribed, under the rules and regulations for the classification of ship. Following survey items generally apply to all … Continue reading

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CoC Oral Exam Preparation (Part- 2) – Survey & Certification

Image Credit: Marinelink Survey: Authorised independent examination, investigation, and inspection, measuring or testing of ship structure, machinery and equipment, done and supervised by Surveyors appointed by regulatory or commercial organisations. Classification Societies: They are third party independent bodies e.g. ABS … Continue reading

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CoC Oral Exam Preparation (Part- I) – Machinery

Source: MAN Diesel (MAN-B&W-K98MC) Cylinder liner wears: 1) Normal frictional wear: Due to metal to metal contact with high surface asperities under marginal lubrication condition. 2) Abrasive wear: Due to presence of hard foreign particles from fuel, LO, and air. … Continue reading

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CoC Oral Exam Preparation (Part – 20): EKG

  How does emergency alarm ring? Ans:    Continuous ringing of bell. Emergency situation is explained at the muster situation. Pattern of Emergency signal is indicated on Muster list Q. Explain the Fire Tube and Water Tube Boiler. Fire Tube Type: … Continue reading

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Question and Answer for Oral Exam, Part – 1

What is I.S.M. ? The International Management Code for the Safe Operation of Ships and for Pollution Prevention (International Safety Management (ISM) Code).  What is I.M.O. Convention ? Conventions are chief instruments of IMO, being binding legal instruments, regulating some … Continue reading

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