Home Online tests CES Oil tanker Handling and Stowage Test for seamans about Cargo Handling and Stowage on Oil Tanker (CES v6.0)

Online testing: Test for seamans about Cargo Handling and Stowage on Oil Tanker (CES v6.0)

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The test consists of 80 random questions.
Total questions on this topic: 119

Question 1 from 80

When internally transferring any oil cargo within the vessel, the correct procedure would be to:

Obtain permission from the receivers and retain all e-mail correspondence for the attention of the cargo surveyors.

Transfer no more than 5 % of the total cargo volume at any one time.

Obtain permission from the charterers and document all operations fully in the Oil Record Book.

It is not necessary to obtain any permissions, provided the Captain makes an entry in the Deck Log Book, documenting his reasons for moving cargo.

With reference to the exposure of “vapours” from oil cargoes, “Short Term Exposure Limit” value is determined by:

The airborne concentration of a toxic substance averaged over any 10 minute period, usually expressed in ppm.

The airborne concentration of a toxic substance averaged over any 15 minute period, usually expressed in ppm.

The airborne concentration of a toxic substance averaged over any 25 minute period, usually expressed in ppm.

The airborne concentration of a toxic substance averaged over any 30 minute period, usually expressed in ppm.

When commencing the cargo transfer at the terminal, the decision to commence the transfer is made by:

The mutual agreement of those in charge of cargo operation, both on board and ashore.

The person in charge of cargo operation at the terminal.

The person in charge of the chartering and operation of the vessel.

The person in charge of cargo operation on the vessel.

What is a VPR (OPA-90)?

Vessel Response Plan.

Vessel Report Plan.

Vessel Response Procurement.

I don’t know.

In context of cargo oil depth and ullage measurements, the abbreviation UTI stands for:

Ullage Topping Instrument.

Uniform Tank Indicator.

Uncorrected Tank Innage.

Ullage Temperature Interface.

Every oil tanker of 5 000 tonnes deadweight and above delivered on or after 1 February 2002 shall comply with intact stability whereby it must have a minimum GM (metacentric height) in port of:

Not less than 0,10 m.

Not less than 0,25 m.

I don’t know.

Not less than 0,15 m.

The reporting of incidents involving harmful substances and/or marine pollutants is regulated under:

Annex II to SOLAS 1974.

Protocol I of MARPOL.

The UN Convention on the Reporting of Accidents and Incidents which Present a Hazard to the Marine Environment 2004.

Appendix B of the Supplement to the IMDG Code

Oil tankers of 70 000 tons and above, delivered after 31 December 1979 shall be:

No requirement regarding number of slop tanks.

Shall be provided with at least 2 slop tanks.

I don’t know.

Shall be provided with slop tank.

The ODME printed record for ballast water discharge overboard from the cargo piping system on oil tankers operations must be retained on board for a minimum period:

Of 3 years.

I don’t know.

Of 2 years.

Of 1 year.

How many square metres does the IAMSAR Volume 3 manual suggest may be calmed by releasing 200 litres of lubricating oil slowly through a rubber hose with the outlet maintained just above the surface while the ship proceeds at slow speed?

Approx 500 square metres.

Approx 5 000 square metres.

Approx 50 square metres.

Approx 50 000 square metres.

During tank washing, besides maintaining the tank oxygen content below 8 % by volume, it should also be ensured:

That the tank is maintained at atmospheric pressure level.

That a negative pressure is maintained in the tank.

That a positive pressure is maintained in the tank.

That a minimum of 2,4 bar inert gas inlet pressure is maintained in the tank.

On board a crude oil tanker, guidance on the washing system and equipment along with the applicable operating procedures, can be found in:

The Oil Record Book – ship particulars page.

The Operating and Equipment (COW) Manual.

The ODME Operating Manual – manufacturer’s instruction section.

MARPOL – Annex I.

The purpose of permanent continuous coamings fitted from side to side across the decks near the accommodation of an oil tanker is:

To keep deck spills away from the accommodation and service areas.

To reduce the effects of racking stresses.

To push the sea water shipped onto the deck over the sides of the ship.

To increase the strength of the deck structure.

As per the IMDG Code, an “article” is referred to as:

Something that is packed within a freight container.

A device that is responsible for initial dangerous reaction.

A device that contains a dangerous substance or mixture of substances.

A form that contains important information about a hazardous substance.

Prior carrying out a Crude Oil Washing operation, the tank from which the crude is to be used for washing is usually partially discharged. This is done so as to:

Ensure that all water settled in the tank is removed prior washing, so as to ensure that the fresh cargo can be loaded on top without fear of contamination.

Ensure that only the required quantity of oil are kept in the tank, so as to reduce the amount of slops retained on the ship.

Ensure that any settled water is removed from the tank and only “dry” crude is used for washing so as to avoid electrostatic hazards during washing.

The DoS addresses the responsibility for the security of the water around the ship and the verification of increased threat levels.

True.

False.

The Reid Vapour Pressure (RVP) test is commonly used for measuring:

The absolute vapour pressure of the liquid at 37,8 °C.

The absolute vapour pressure of the liquid at 15,6 °C.

The absolute vapour pressure of the liquid at 38,7 °C.

The absolute vapour pressure of the liquid at 59 °C.

As per international regulations, the minimum inert gas pressure required to be maintained in slop tanks if slops are retained on board is:

10 mm/water gauge.

750 mm/water gauge.

1 000 mm/water gauge.

100 mm/water gauge.

When tank cleaning hoses are tested for electrical continuity, they must display a reading of:

Not greater than 6 ohms per metre length.

I don’t know.

At least 8 ohms per metre length.

Not more than 10 ohms per metre length.

According to 33 CFR 156.170, for oil tankers trading in US waters, the minimum requirement for testing of cargo transfer hoses and associated piping system are:

That no leakage occurs under dynamic fluid pressure of less than 1,5 times the maximum allowable working pressure.

That no leakage occurs at the nominal anticipated working pressure.

That no leakage occurs under static liquid pressure of at least 1,5 times the maximum allowable working pressure.

I don’t know.

For a vessel proceeding enroute, located more than 50 nm from nearest land outside a special area and having in operation its ODME, the maximum instantaneous rate of an oily water mixture is:

30 litres per nautical mile.

300 litres per nautical mile.

60 litres per nautical mile.

I don’t know.

During Crude Oil Washing, those areas of the cargo tanks which are not directly struck by the oil jet from the tank washing machines are referred to as:

Hidden areas.

Protected areas.

Deflected areas.

Shadow areas.

The compensation payment by the charterer that is due when a vessel is unable to load/discharge her cargo within the allowed and contracted time is referred to as:

Demurrage.

Contractual penalty discount.

Deferment.

Discretion.

Which of the following type of crude oil requires special consideration in terms of carriage and cleaning?

Reconstituted Crude.

Medium Crude.

Paraffinic Crude.

Sweet Crude.

After passing through the scrubbing tower of an inert gas system, the approximate level of carbon dioxide in the inert flue gas should be:

3 %.

21 %.

1 %.

13 %.

What is to be considered when deciding the position of the accommodation on an oil tanker?

I don’t know.

A single failure of deck or bulkhead shall not allow fumes into the accommodation spaces.

They must be at the after end of the vessel.

There are no restrictions to the position of the accommodation.

According to ISGOTT, in which of the following situations, when measuring vapour space oxygen content of a cargo tank, can a electrochemical sensors in gas measuring instruments become damaged or poisoned?

When the sample containing hydrocarbon/inert gas has a hydrogen sulphide content greater than 2 %.

When the sample containing hydrocarbon/inert gas has a hydrogen sulphide content greater than 1 %.

When the sample containing hydrocarbon/inert gas has a hydrogen sulphide content greater than 3 %.

I don’t know.

At which of the following concentrations of Hydrogen Sulphide might a person experience dizziness, fatigue and memory loss?

40 ppm.

20 ppm.

10 ppm.

I don’t know.

A tanker in ballast, having recently left the discharge port is involved in a collision. The two vessels are still interlocked after the collision and a survey of the ships gives all crew members are safe and the damage is focussed to the vicinity of the impact. What should be the greatest concern at this time?

When the two vessels separate one (or both) of the vessels will have insufficient stability to remain afloat.

The vessels moving together will create even greater damage to their structures.

The possibility of pollution.

The ships moving together in the swell/seaway will cause a spark and consequently an explosion.

The scantling draft of an oil tanker fitted with segregated ballast tanks is:

The minimum draught amidships when in ballast condition.

The maximum draught determined by the Loadline Rules.

The draught for which the structural strength of the ship has been designed.

I don’t know.

When cargo discharge reaches stripping levels on an oil tanker, it is necessary to reduce the inert gas pressure so as to:

Comply with the requirement of MARPOL Annex VI.

Avoid over-capacity in the IG generator.

Avoid locking the cargo pump impeller.

Minimise blowback.

When in-service testing a hose used for cargo transfer on an oil tanker (and for which the elongation of the hose assembly when new was greater than 2,5 %), the maximum permitted elongation before the hose must be withdrawn from service should be:

I don’t know.

Not more than 1,5 times the temporary elongation measured at the previous in-service test, as documented in the ship’s annual test record.

Not more than 1,5 times the temporary elongation measured when the hose assembly was new, as documented in the manufacturer’s certificate.

Not more than 1,25 times the temporary elongation measured when the hose assembly was last tested, as documented in the appropriate certificate.

When describing the characteristics of oil cargoes or oil/water slops, a “mercaptan” is:

A colourless, odorous gas, with a smell similar to rotting cabbage and which is generated naturally by the degredation of natural organisms, as may be found where water has remained under oil for a long time.

I don’t know.

A chemical additive blended with crude oil to inhibit the natural “rotten egg” smell associated with certain grades.

The component of hydrocarbon-based cargoes which is formed from Merolion Carbonized Tannin.

Why is it important to have good relationship on-board a vessel?

It encourages crew to extend their contract.

It will prevent accidents from happening.

It leads to better work performance and positive atmosphere among the crew.

Crew comes to know each others problems.

When an inhibitor is added to an oil cargo, the items mentioned on the accompanying certificate include:

Inhibitor name; amount added; date added; period of efficiency; precautions if voyage length exceeds that period; eventual temperature limitation.

Inhibitor class; amount added; date of expiry; minimum period of optimum efficiency; precautions to be taken when added; minimum temperature requirement.

Inhibitor name; percentage applied; date of expiry; precautions to be taken on voyage and interval of application; maximum temperature at which continuously effective.

Inhibitor class; percentage blended; date added; maximum period of efficiency and applicable temperature limits; maximum storage period on board; contact number of manufacturer.

Which of the following best describes what the wax content of crude oil is?

The percentage of wax, expressed as a percentage, remaining in an oil product after distillation.

The percentage, by weight, of paraffinic wax found in a representative sample of the crude oil.

I don’t know.

The observed volume percentage of waxy deposit found in a cargo tank after discharge in relation to the total volume of cargo previously carried.

The one particular hazard to be taken care against, when using portable steam driven blowers for ventilating oil cargo tanks is:

That plastic extension tubes should not be used, in case the top collar overheats and melts, causing the tube to drop into the tank.

That prolonged use may cause the core material of the fan to heat up to a point where it may become a source of ignition.

That the steam outlet must point vertically upwards to avoid possibly burning the legs of passing personnel.

That the exhaust does not vent into the cargo tank, in order to prevent possible build-up of static electricity.

The chemical characteristics of effluent water from an inert gas scrubber and the condensate which collects in the deck mains would be:

Acidic in nature.

Demineralised in nature.

Alkaline in nature.

Neutral in nature.

When describing the characteristics of oil cargoes or oil/water slops, a “mercaptan” is:

A device fitted to a cargo pump which automatically alerts the operator once traces of water start to be detected during discharge.

A chemical additive blended with crude oil to inhibit the natural “rotten egg” smell associated with certain grades.

The component of hydrocarbon-based cargoes which is formed from Merolion Carbonized Tannin.

Substances, materials and articles shall be stowed as indicated in the Dangerous Goods List of the IMDG Code, in accordance with a series of stowage categories, which are designated as:

5 categories, labelled A-E.

Three categories, numbered I, II and III.

10 categories, lattered A-K (excluding I).

10 categories, numbered 1-10.

Fluid driven eductors operate on Bernoulli’s principle, which states that:

The discharge rate is inversely proportional to the pressure applied in the drive inlet.

The increase in pressure at the eductor inlet is inversely proportional to the decrease in pressure as measured at the discharge orifice.

The speed of a moving fluid increases as the pressure in the fluid decreases.

The volume of a fluid increases as the pressure in it decreases.

Which of the following is a definition of a petroleum product which is “non-flammble”?

Petroleum having a flash point of 80 °C or above, as determined by the closed cup method of test.

Petroleum having a flash point of 60 °C or above, as determined by the closed cup method of test.

I don’t know.

Petroleum having a flash point of 100 °C or above, as determined by the closed cup method of test.

What statutory certificate is carried onboard to indicate that a tanker is in compliance with Annex 1 of the MARPOL convention?

Oil Record Book.

The International Oil Pollution Prevention (IOPP) Certificate.

I don’t know.

International Safety Guide for Oil Tankers and Terminals (ISGOTT).

How much liferaft capacity should be provided on a conventional cargo ship of more than 85 metres in length?

25 % of the complement on each side of the ship.

100 % of the complement if it can be readily launched on either side of the ship. If it cannot be readily launched on either side, 100 % must be provided on each side.

75 % of the complement on each side of the ship.

50 % of the complement on each side of the ship.

“Door to door” shipment is covered under:

A Multi-Phase Bill of Lading.

A Through Bill of Lading.

A Destination Bill of Lading.

An Ocean Bill of Lading.

According to SOLAS, the mechanical ventilation system of the cargo pump room shall be capable of making:

I don’t know.

At least 10 air changes per hour.

At least 20 air changes per hour.

At least 6 air changes per hour.

To correctly report an oil spill in US waters:

The master of the vessel responsible for the spill must advise the Environmental Protection Agency National Incident Reporting Center (or the appropriate regional office) within 2 hours of the incident being reported to that person.

The person in charge must first report the spill to the National Response Center or, if not practicable, to the Environmental Protection Agency regional office or local US Coast Guard Marine Safety Office. This must be done immediately that person has knowledge of the spill.

The person responsible for the spill must report preliminary details to the appropriate State Police within 30 minutes of the accidental discharge taking place.

I don’t know.

The inert gas system shall be capable of delivering inert gas to the cargo tanks at the rate of:

No such requirement.

At least 125 % of the maximum discharge capacity.

At least 135% of the maximum discharge capacity.

At least 150 % of the maximum rate of discharge capacity.

What is the relationship between absolute pressure and gauge pressure?

Absolute pressure = gauge pressure.

Absolute pressure = gauge pressure – atmospheric pressure.

I don’t know.

Absolute pressure = gauge pressure + barometric pressure.

With reference to oil cargo calculations, API refers to:

American Petroleum Institute.

Approved Petroleum Inspector.

Average Petroleum Index.

Aggregate per Inch.

As per MARPOL, the formula for calculating the minimum draft amidships for crude tankers in ballast condition is:

2,0 + 0,02 L.

I don’t know.

2,0 + 0,015 L.

2,0 + 0,002 L.

The purpose of the decanting line between two slop tanks, where fitted, is:

To enable most of the recovered oil to be retained in the primary slop tank, while the cleaner part of the water will flow into the secondary slop tank, where it can be re-used as wash-water.

To avoid a build-up of static electricity during water washing, caused by air being drawn in as the primary slop tank empties.

To enable the filling of the secondary slop tank via the primary slop tank.

To enable both the primary and secondary slop tank to be filled without using the main cargo lines.

As per IMDG Code, the main criteria for drawing up classes for safe handling of hazardous substancesis on the basis of:

I don’t know.

Selective laboratory tests commissioned by the Committee.

Chronological order in which they have been assessed.

The type of hazard they present.

The purpose of expansion couplings to be fitted on the longitudinal pipelines of oil tankers is:

To allow the pipelines to follow the ships flexing movement when pitching.

To allow the pipeline to expand when loading a hot cargo through the pipeline.

To prevent the pipeline from cracking when the ship suffers from Racking stresses.

I don’t know.

During an audit, adherence to the company cargo handling procedures can best be demonstrated:

By requesting that an audit takes place during cargo operations.

By providing a summary of out-turn figures for the auditor.

I don’t know.

By being able to provide comprehensive and verifiable documentary records of cargo operations.

Master of every ship must provide:

Facilities to conduct training whenever required by the training officer.

A link between the shipboard training officer and the company training officer ashore.

The training during crews working hours only.

Proper rest to the crew after each training programme.

When discharging dirty ballast from an oil tanker at a high flow rate with main cargo pumps, the instantaneous rate of discharge of oil is calculated by formula:

Instantaneous rate of discharge (l/nm) = oil content (ppm) · flow rate (m3/h) / speed (knots) · 1 000.

Instantaneous rate of discharge (l/nm) = oil content (ppm) · 1 000 / flow rate (l/h) · speed (knots).

Instantaneous rate of discharge (ml/nm) = oil content (ml/nm) · flow rate (l/m) / speed (knots) · 100.

I don’t know.

A “Pellistor” is:

It is the electrical sensor which detects low pressure in an Inert Gas generating control system.

It is a sensor that can be used in a combustible gas indicators to detect and measure flammable gas concentration as a percentage of its lower flammable limit.

I don’t know.

It is the common term applied to the metal, ceramic or other heat-resisting material which can cool even an intense flame below the temperature required for ignition, as utilised in a flame arrester.

Crude oils may be considered to consist:

A natural mixture of carbon and sulphur isomers.

A refined blend of hydrocarbon compounds and sulphur extracts.

A mixture of carbon extracts and naturally occurring wax.

A natural mixture of simple and complex hydrocarbon compounds.

As per the US Code of Federal Regulations, the current Oil Transfer Procedures for a vessel carrying out discharge in US ports must be:

That the procedures be legibly printed in a language or languages easily understood by personnel engaged in the transfer operation and permanently posted or available at a place where crew members can see and use them.

That the Master of the vessel engaged in a transfer shall, before commencing any transfer operation, ensure that all crew members involved in that operation shall be familiar with the applicable operating and emergency procedures and be capable of communicating in a common language with terminal operators.

That the procedures be available in hard-copy or electronic format to the Supervising Officer in a language with which he is familiar.

That the procedures be printed in the English and Spanish languages and permanently posted in the wheelhouse of the vessel.

What is the purpose of girders in the tank?

They support the stiffeners.

They transfer all sea forces acting on the plating.

They transfer all the cargo forces acting on the plating.

They support the stiffeners and also take up some of the sea forces.

If all indications are that a cargo has been received without damages, irregularities or short shipment and the phrase “apparent good order and condition” is entered on the Bill of Lading, then this Bill is this said to be:

A Due Title Bill of Lading.

An endorsed Bill of Lading.

A Bill of Lading completed for shipment.

A clean Bill of Lading.

The longitudinal bending moments caused by cargo distribution on an oil tanker need to be taken into consideration:

Only during loading and discharging cargo.

Only when on ballast passage in heavy seas and when the vessel is pitching.

Only when on loaded passage in heavy seas and when the vessel is pitching.

During loading, discharging and on loaded passage.

What is the purpose of girders in the tank?

They transfer all the cargo forces acting on the plating.

They support the stiffeners and also take up some of the sea forces.

They transfer all sea forces acting on plating.

They support the stiffeners.

Segregated Ballast Tanks on an oil tanker may best be defined as:

Cargo tanks which may be used for the carriage of ballast.

Cargo tanks which each have their own individual pumps, are fitted with independent piping systems and are served by unconnected ventilation arrangements.

Tanks which are completely separate from cargo or fuel oil systems, being permanently allocated to the carriage of ballast and fitted with their own pumps and associated piping.

Cargo tanks which may be used for ballast, where the lines are not connected to the Oil Discharge Monitoring Equipment.

If the shipper wishes to ensure that a vessel or her operators will not be held responsible for any damage that may arise from the carrier issuing a clean Bill of Lading, even though the Mate’s receipt is marked as “unclean”, such a document is called the:

An addendum to the Bill of Lading.

A Letter of Credit.

I don’t know.

A Letter of Indemnity.

As per MARPOL, Oil Record Book Part II, Cargo/Ballast Operations, must be carried and completed on oil tankers of:

150 gross tonnes and above.

I don’t know.

20 gross tonnes and above.

50 gross tonnes and above.

Prior to discharging cargo from an oil tanker, “line displacement” is usually conducted to:

To balance a rigid cargo arm.

I don’t know.

The calibration of the ship’s flow meter.

Verify the pipeline contents with previous grade have been replaced.

For security purposes, the IMDG Code should be read in conjunction with the:

Chapter XI-2 of SOLAS and Part A of the ISPS Code.

Part B of the ISPS Code and Chapter II of the Maritime Transport and Offshore Facilities Act.

I don’t know.

IMO NVIC 24 and 46 CFR 2.05.

A VLCC is to anchor in a depth of 80 meters in open water with moderate swell running. How many shackles of anchor chain should be used to ensure safely anchored?

8 shackles.

11 shackles.

6 shackles.

3 shackles.

One particular group of hazardous goods that is highlighted by the IMDG Code as potentially being the most dangerous for carriage is:

Infectious substances.

Organic peroxides.

I don’t know.

Liquefied gases.

Crude Oils required by MARPOL to be specifically listed in a tanker’s Crude Oil Washing manual as unsuitable for COW are:

Those with highbenzene content.

Those with high pour point of viscosity.

Those with high basic sediment and water content.

I don’t know.

What is meant be the term “sour crude”?

Crude oil containing hydrogen sulphide content greater than 0,1 % by volume.

Crude oil containing hydrogen sulphide content greater than 0,3 % by volume.

Crude oil containing hydrogen sulphide content greater than 0,5 % by volume.

I don’t know.

If W = Displacement, L = length, B = Breadth, D = depth of vessel, Cb = Block Coefficient, Cw = Coefficient of Waterplane, RD = Relative Density, then:

W = L · B · D · Cb / RD.

W = L · B · D · Cb.

I don’t know.

W = L · B · d · Cw.

With reference to oil cargo characteristics, “cloud point” is:

I don’t know.

The temperature at which an oil product begins to emit vapours which can be observed in a spectroscope due to the volume of solid particles extracted during evaporation.

The depth within a cargo above which no waxy solids are entrained.

The temperature at which a liquid hydrocarbon begins to congeal and take on a cloudy appearance, due to the bonding of constituent paraffin compounds.

The purpose of the “mud box” fitted on a tanker is to:

Collect ships waste and water mud when ballasting and de-ballasting.

Catch the mud from the anchors and cables and deposit these at the windlass.

Restrict any particles and solids entering the pipeline system.

Catch spills when connecting the discharge or loading hose.

Any person who can assume overall charge of the ships crude oil washing operation must have:

They must have at least six months experience on tankers, be knowledgeable of the cleaning procedures and equipment applicable on board the vessel and be able to fully demonstrate understanding of the operation of the ODME equipment.

At least 12 months appropriate experience on oil tankers, have participated in at least two COW programmes and be fully knowledgeable of the contents of the Operations and Equipment Manual.

I don’t know.

They must have at least three months experience on tankers, have participated in at least six washing operations and be aware of the procedures associated with the completion of the Oil Record Book.

With reference to oil tanker equipment, the abbreviation VECS stands for:

Vapour Ejection Control System.

Vapour Emission Calibration System.

Vapour Emission Control System.

Vapour Emission Control Standard.

Under the ISM Code the provision of individual control measures for specific work-related tasks exist in the:

Definition of supervisory responsibilities.

Documentation of individual job descriptions.

Permit to Work system.

Due diligence clause.

As per the IMDG Code, an “article” is referred to as:

A device that contains a dangerous substance or mixture of substances.

A device that is responsible for initiating a dangerous reaction.

A form that contains important information about a hazardous substance.

Something that is packed within a freight container.

The «Cargo Handling and Stowage, Management, Oil Tanker» subject provides both theoretical and practical knowledge on safely working with electrical equipment. Mastery of this material is a key indicator of an employee’s competence in their role aboard a vessel. Cargo handling and stowage on an oil tanker involve the processes of loading, unloading, and storing liquid cargo, such as crude oil or petroleum products. These operations require meticulous planning, strict adherence to safety protocols, and compliance with industry regulations to ensure the safe and efficient transportation of liquid cargo.

Version: 4.1, 5.0, 5.1, 6.0.0, 6.0.8, 6.0.10.
Test type: STCW.
Department: Cargo Handling and Stowage.
Level: Management.
Vessel type: Oil Tanker.

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