家在线测试 CES Chemical tanker 2nd-Off / 3rd-Off Test online CES 5.1 for 2nd-Off / 3rd-Off, Chemical tanker vessel

在线测试： Test online CES 5.1 for 2nd-Off / 3rd-Off, Chemical tanker vessel

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问题 1 从 90

*Among working conditions listed below which one is required for every propulsion engine of lifeboats?

Any type of fuel

For a period of at least 72 hours

Starting achieved within 2 min of commencing the start procedure at an ambient temperature of -15°C

Propeller permanently driven by the engine

Which one of the listed requirements regarding the stowage of rescue boats corresponds to present SOLAS regulations. Rescue boats shall be *stowed:

Wherever space is available

In a state of readiness for launching in not more than two minutes

Stowed in a dedicated and covered area

So that neither the rescue boat nor its launching arrangements will interfere with any survival craft at any other launching station

Where on board would you find out which fire sections are enclosed by "A" or "B" class divisions?

In the stability book

On the capacity plan

On the fire control plan

On the general arrangement plan

Proteinic foams have the feature of being?

Of high expansion, not easily contaminated by hydrocarbons

Of low expansion, not easily contaminated by hydrocarbons

Of high expansion, made of tense-active compounds

Of low expansion, viscous and solid, easily contaminated by hydrocarbons

How is the activation of any detector or manually operated call point of fixed fire- detection and fire-alarm systems to be indicated? (SOLAS II-2/13.1.4)

By all the indication methods listed

By visual and audible signal at the control panel and indicating units

By sounding the ship-s fire alarm signal in crew accommodation and service spaces

By alarm signals at the bridge and engine room control panels

On all UMS operated vessels and also on most other vessels the engine room is equipped with fire detectors. What requirements of testing and checking of the detectors are to be observed?

All the mentioned alternatives.

When testing detectors by suitable equipment (smoke and heat) check that the sensors self controlling system, e.g. a flashing control light etc. is functioning.

Check that the actual detector is giving appropriate signals to the central control unit and that all electric connections are in good order.

Check the detector with heat and/or smoke (in accordance with instructions in its manual)

The smoke detector (fire indicator) indicates fire in a cargo hold loaded by general cargo. What first action should be taken?

Inspect the scene before deciding the method to be used for fire-fighting

Close the ventilation system and other openings to the hold in order to choke the fire

Use the ship's gas extinguishing central system to put out the fire

Start the fire pumps, open the hatches and start fighting the fire by fire hoses

What number of fire hoses is required for cargo ships of 1000 tons gross and upwards? (SOLAS II-2/4.7.4.1)

One hose for every second fire hydrant

One for each fire hydrant

Two hoses for each vertical fire zone

One hose for each 30 meter length of ship plus one spare. Hoses for engine and boiler room in addition

The effectiveness of CO2 as an extinguishing agent is based on:

Comburent suppression

Cooling and inhibition

Dilution, cooling and inhibition

Inhibition and comburent suppression

What are the three diameters of fire hoses most commonly found on ships?

10, 50 or 85 mm

25, 45, or 70 mm

17, 43 or 74 mm

50 or 100 mm

*The correct order of actions to be taken in a fire emergency, should be…

Evaluation of the situation, confinement of fire, rescue and life-saving, extinction

Evaluation of the situation, rescue and life-saving, confinement of fire, extinction, then feed back on the emergency

Extinction, confinement of fire, feed back on the emergency, rescue and life-saving, then evaluation of the situation

Extinction, evaluation of the situation, confinement of fire, rescue and life-saving

What is the general requirement for the closing mechanisms of the inlets and outlets of all the ventilation systems?

Only a manually closing mechanism is allowed

Closing must be remotely controlled from the central fire control panel

Closing must be possible from outside the spaces being ventilated

An automatic closure for each section protected by a fire detection and alarm system must be provided

What is false regarding the function :” Transmission and reception of on scene communications ”

On area A1 this function is based on the use of VHF R/T

On area A4 this function is based on the use of HF R/T

On area A3 this function is based on the use of VHF or/and MF R/T

On area A2 this function is based on the use of VHF or/and MF R/T

A Category "B" Chemical Cargo which has a melting point of more than 15° C. can be carried:

In tanks adjacent to the ship's shell plating having heating coils?

In tanks where the heating coils have been removed and supply and return steam pipes blanked off?

In tanks not adjacent to the ship's shell plating having heating coils?

In any tank onboard the vessel?

Pure Nitrogen is sometimes used to blanket sensitive cargoes because:

It affords some protection against spontaneous reaction

All the mentioned alternatives

It affords protection against oxidation

It affords protection against humidity

COTP can request (OPA-90)

Maximum one drill a year

Maximum two drills a year

Unannounced drills at any time

Participation in all announced drills

If pollution takes place, what would you do immediately?

Report to relevant authorities.

Inform the manager.

Start clean-up operations.

Inform the vessel-s agent.

Is there any special area where it is forbidden to pump out any sludge or oil residues?

There is 5 special area where it is forbidden to pump out any sludge or oil residues

There isn’t any special area where it is forbidden to pump out any sludge or oil residues

There is 3 special area the Baltic, Mediterranean and the Black sea where it is forbidden to pump out any sludge or oil residues

There is 4 special area where it is forbidden to pump out any sludge or oil residues

Which of the following requirements regarding on board stability data corresponds to present regulations? (NSCL 4/12.1)

Drawings and caculations documenting the stability of the ship, both in intact and all possible damage condition.

A calculation example showing the use of "KG" limitation curves.

A calculation example showing use of "GM" limitation curves.

Stability data produced by stability calculation instruments.

After the start of a man overboard manoeuvre, whom shall be informed?

Chief Officer

Electrician

Engine Room

Galley

The bridge wheelman has not reported for duty and there is a suspected "Man Overboard" situation on your vessel. The ship has been searched and there is one seaman missing? The vessel turns round and retraces the course back, calling for assistance from other vessels in the vicinity. What should be the focal point for any search pattern to be established?

The focus of the search should be from the present position as he probably went overboard when proceeding to the bridge for his watch.

Determine when the seaman was last sighted and concentrate the search round the course line between the last sighting and present position, taking into account any prevailing current.

The last sighted position should be the focal point of any search pattern and all ships should keep a good lookout in that vicinity, moving outwards to the present position.

Determine the drift and leeway of own ship and take this deviation from track into account on the return course. The search should focus around this return track back to the last sighted position

The maximum rudder angle on your ship is 35 degrees. Do you think this is the angle that the rudder is most effective?

No, the most effective rudder angle is about 25 to 30 degrees, this is because the rudder is "stalling" at 35 degrees angle

No, the rudder is most effective at small rudder angles

No, the rudder is most effective at angles between 10 and 20 degrees

Yes, the rudder is most effective at max angle

The ship is at anchorage. What is important to rise forward in daylight?

A special anchor flag

The company flag

Nothing in particular

Anchor ball

The ship is navigating in dense fog where the visibility is less than one mile. The Arpa radar is set on a range 12 miles on a course of 314 degrees and own ship has a vector as shown. What is the vector mode selected on the Arpa?

Relative vectors, ground stabilised

True vectors

Relative vectors.

Relative vectors, sea stabilised

Can the OOW be the sole lookout?

No.

Only during day time

Only in good visibility.

Only during day time when visibility, traffic etc make it safe

An immersion suit is constructed such that it can be unpacked and donned within:

3 min

2 min

4 min

5 min

The grabline of a lifebuoy has a length of:

5 times the outer diameter of the lifebuoy

4 times the outer diameter of the lifebuoy

2 times the outer diameter of the lifebuoy

3 times the outer diameter of the lifebuoy

Which item among those below is included in the normal equipment of every liferaft ?

one copy of the prescribed life-saving signals

one searchlight which can work continuously for not less than 3 hours

two painters of a length equal to not less than the distance from the stowage position of the liferaft to the waterline

one boat-hook

*Give the meaning of the following symbol

Secure liferaft canopy closing device

Secure hatches

Open hatches

Secure doors in the ship's side plating

The Training Manual shall contain instructions and information on the life-saving appliances and the best method of survival. The training manual shall contain detailed explanations of crew duties in relation to emergency situations. Which of the following tasks or duties shall be included in the manual according to present regulations?

The method and use of sea-anchors (drogues).

The use of oars and other propulsion equipment for survival crafts.

The use of on-board communication equipment.

Correct donning of fire protective clothing.

The training manual shall contain instructions and information in easily understood terms and illustrated wherever possible. Which of the following objects do not have to be explained in detail in the manual according to present regulations?

Method and use of devices for protection in launching areas

Method of launching from inside survival craft

Release from launching applications

Use of breathing apparatus

Who is the responsible person for the safety of the ship and all those onboard?

The Master

Master, Chief Officer and Chief Engineer

The company

The authorities in each different port the ship calls

What IMO conventions take care of the human safety at sea?

There isn’t any conventions that take care of the human safety at sea

It is the MARPOL conventions that take care of the human safety at sea

It is the STCW 78/95 that take care of the human safety at sea

It is the SOLAS conventions that take care of the human safety at sea

Ordinary thyristors (SCR) must often be protected against reverse overvoltage transients because even over-voltages of extremely short duration can destroy them. These circuits have been given such over-voltage protection, but only one of them is correct. Which?

Figure 2

Figure 3

Figure 1

Figure 4

What is the safe time for operating the crankcase door when oil mist alarm is activated and the engine has been stopped?

After 20 minutes

After 1 minute

After 10 minutes

After 5 minutes

Commonly available on board an oil tanker, what is the industry standard Guide that describes best safety practise for tanker and terminal operations?

SOLAS 1974

STCW '95

The ISGOTT Guide

MARPOL 73/78

Temperature sensors of all types are normally mounted in a well, or pocket, when used in pipelines. Why is this done?

Allow removal of the sensor also when liquid is flowing in the pipe.

Decrease the temperature gradient between the liquid and the sensor.

Avoid electric current flowing from the sensor to the liquid.

Suppress electro-magnetic interference between liquid in the pipe and the sensor.

What English name is given to all the plates, cups, saucers, serving dishes, etc?

Cuttlery.

Servery.

Crockery.

Stockery.

Why is nitrogen used for the inerting of hold spaces and interbarrier spaces on LNG carriers?

Because of the high oxygen content of combustion generated inert gas.

Because the carbon dioxide in combustion generated inert gas would freeze when in close proximity to the cargo.

Because of the high humidity in combustion generated inert gas.

Because of the high temperature of combustion generated inert gas.

On a RoRo vessel, which of the ships trading certificates details the type and location that dangerous goods are allowed to be stowed onboard

The Cargo Ship Safety construction certificate

Safety Equipment certificate

Certificate of compliance for the carriage of Dangerous goods

Insulating materials used on liquefied gas carriers are required to have certain properties including a good vapour diffusion resistance. Which of the insulating materials has the highest vapour diffusion resistance?

Mineral wool.

Polyurethane foam.

Perlite.

Polystyrene.

To allow efficient pumping of aromatic Crude Oil cargoes, they are usually heated to reduce their viscosity. What is the ideal maximum viscosity that is normally achieved for this purpose?

250 cSt (250 mm2/s)

450 cSt (450 mm2/s)

45 cSt (45 mm2/s)

1,250 cSt (1,250 mm2/s)

Which of the following is a summary of the features of a "controlled tank venting system" as may be found on a chemical tanker?

PV valves are fitted to limit the pressure or vacuum in the tank; no shut-off valves may be fitted either above or below the PV valves; provision may be made to by-pass the PV valves under certain operating conditions; such a system shall consist of a primary and secondary means of allowing full flow of vapour, except that the secondary system may be replaced by pressure sensors fitted within the tank.

The system permits vapour recovery via a collection manifold which may be connected to a shore reception facility.

PV valves are fitted to limit the pressure or vacuum within the tank; the PV valves shall be capable of being isolated or by-passed; the system shall be supplemented by pressure sensors within the cargo tank.

The system is fitted to a tank used for cargoes having a flash point not exceeding 60 degrees Celsius and is fitted with a device to prevent the passage of flame into the cargo tank.

A death of one of the ship’s crew occurs on board whilst the vessel is at sea, what actions must you legally take?

Confirm death. Have body moved to a freezer compartment. Contact local agent and British Consul as appropriate. Complete Births and Deaths section of Official log book. Sign seaman off in his absence. Make an entry in the deck log book detailing actions

Confirm death. Notify next-of-kin. Make an entry in the narrative section of the Official log book, sign seaman off in his absence Notify agent and British Consul when abroad. Have belongings collected and packed by two crew members, and making three copi

Confirm death. Contact local agent and arrange to have body medi-vacced from vessel. Notify company. Complete births and deaths section of official log book. Arrange for relief at next port . Sign seaman off in his absence.

First aspect confirm death. Notify company, and make arrangements for notification of next-of-kin. Arrange to have body moved to freezer area. Notify local agents and British Consul when abroad. Complete Births and Deaths section of Official Log book. Ma

What would be the most likely cause of a smell of "rotten eggs" in the upper casing of the engine room?

Fresh water evaparator malfunction.

Open or leaking acetylene bottle.

A leak of exhaust gas from a boiler or diesel engine exhaust.

Failure of the ship's refrigeration system.

For what are bridge indicators required on board a ro-ro vessel?

All shell doors which, if left open, could lead to major flooding

All hinged doors in watertight bulkheads

All sliding doors in watertight bulkheads

All

According to ISGOTT, flue gas that is produced by the burning of a fuel oil that has a high sulphur content will typically contain which of the following amounts of sulphur dioxide?

850 ppm

200 ppm

2,000 ppm

4,000 ppm

What is extracted rape seed meal, soya bean meal, cotton seed meal and sunflower seed meal?

Fishmeal

Seed cake

Kernel Expeller

Grain

Gas detectors are widely used on liquefied gas carriers. Before using a portable combustible gas indicator which has not been used for a period of a few hours what action should be taken?

Just renew the batteries. A calibration is only required if the instrument gives false readings.

Just check the filters. If the sample is free to flow the indicator will work correctly.

Just carry out a zero check and adjustment. If the instrument reads zero correctly it will also read correctly throughout the scale.

Always carry out a full calibration and battery check.

You are on a power driven vessel underway in open water. This vessel is sighted directly ahead. The distance is closing slowly. What action will you take under the International Collision Regulations and why?

This is a vessel engaged in towing and I am seeing the stern light of the tow. The tug is not however showing any lights indicating she is restricted in her ability to manoeuvre. I will however display good seamanship and keep out of her way.

I will keep out of her way. I am the overtaking vessel and am obliged to keep clear under rule 13.

I will maintain my course and speed. The other vessel is being overtaken and is therefore obliged to keep out of the way by rule 13.

The vessel is on a steady bearing and the distance is closing. I will therefore take avoiding action, altering course to starboard and sounding one short blast under rules 14 and 16.

As ships get older which hatch covers need special attention when battening down for sea passage?

The aftermost hatch covers

The midships hatch covers

The foremost hatch covers

Hatch covers abaft the accommodation

What is the name of this unit?

A slip hook

A hydrostatic release unit

An antistatic release unit

A liferaft release unit

How can you avoid and/or reduce potential panic among passengers, if an emergency situation occurs?

Do not inform passengers about the situation. It will only create panic and make it difficult for the crew to handle the situation.

Inform the passengers, that there is nothing to worry about, to keep them calm.

Inform passengers at frequent intervals over the public announcement system about the situation and how they shall act. Use as many of the ships officers and crew among the passengers to assist.

Checking that all crew and passenger are present

What type of vessel is this and from what direction are you seeing it?

This is a vessel engaged in fishing other than trawling, making way through the water, with outlying gear extending more than 150 metres in the direction of the all-round red light. I am seeing her from astern.

This is a vessel engaged in fishing other than trawling, making way through the water, with outlying gear extending more than 150m in the direction of the all-round white light. I am looking at her port side.

This is a vessel engaged in pilotage duties at anchor. I am looking at her port side.

This is a vessel engaged in pilotage operations, deploying or recovering a pilot. I am looking at her port side.

What precaution should be taken when painting on car decks during cargo operations?

There must be an established means of communication between crew members and the duty officer

Spray paint guns must not be used

Cargo hold fan inlets must be closed near the paint area

Permission must be obtained from the harbour authority

On a General Cargo Vessel, what should a cargo lashing plan comply with?

The cargo securing manual

Master's instructions

Charterers? instructions

Shipper's instructions

When is the 2nd Mate supposed to call the Captain?

30 minutes from the pilot station

Just at the usual time

When anything unusual happens, and 30 minutes before the pilot station

Just when he happens to remember

Which of the following is the correct English spelling?

Ingreedients.

Ingrediants.

Ingriedients.

Ingredients.

With regard to the IMDG Code what do Calcium Oxide (UN No. 1910), Magnetized Material (UN No. 2807), Sodium Aluminate (UN No. 2812) and Battery Powered Equipment (UN No. 3171) have in common?

They are listed as Corrosive Substances - IMDG Class 8

They are not listed in the IMDG Code

Due to their characteristics they may be shipped in open top containers

They are not subject to the provisions of the IMDG Code but may be subject to provisions governing the transport of dangerous goods by other modes

What is the name of this unit?

A liferaft release unit

A slip hook

An antistatic release unit

A hydrostatic release unit

"Protective discrimination" means the progressive grading of sizes or tripping times of:

Generators and motors.

Line fuses and overcurrent relays

Magnetic and thermal current transformers.

440 V and 220 V transformers.

Which of the following can be considered to be two of the main requirements for a paint coating for a cargo space of a General Cargo Vessel?

Low odour and heat resistant

Easy to clean and dark in colour

Light reflective and compatible with edible cargoes

Corrosion resistant and heat resistant

The centre cargo tanks on your ship are made of stainless steel, while the wing tanks are made of mild steel with a zinc coating. Your ship is to load some Sulphuric Acid. Which tanks will it be loaded in?

It can not be loaded into any of the tanks on the ship.

Only the stainless steel centre tanks.

Only the zinc coated wing tanks.

Both the stainless steel centre tanks and the zinc coated wing tanks.

In a low pressure auxiliary boiler, if after testing the water, You found the P. alkalinity to be 50 PPM CaCO3, what action would You take?

Increase dosage.

Blow down the boiler and reduce dosage.

Do nothing.

Reduce dosage.

A ship has an electrical system rated at 690 Volts. Which voltage level is this?

Medium voltage.

Low voltage.

High voltage.

Intermediate voltage.

You are going to grind (mince) meat for use in different dishes, including burgers. Which of the following cuts of meat would you use?

Sirloin

Leg

Brisket

Flank

When making a small repair to the furnace refractory lining it is common to make a patch using castable plastic refractory material. Which is the best method, from those given in the options, of securing the patch to the main refractory lining?

Drill holes in the main lining and fix some anchor bolts to cast the patch around.

Cut away the damaged area to form an undercut right around the edge and fill with the plastic refractory material.

Pin some wire mesh across the damaged area and cast the patch over it.

Make a smooth hollow in the damaged area and fill with the plastic refractory material.

The lights displayed here indicate that this is one of two types of vessel. What are the two options?

A power-driven vessel engaged in towing, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, length of tow under 200 metres, seen head-on OR a power-driven vessel underway. Less than 50 metres in length and displaying the second all-round white masthead light, seen head-on.

A vessel engaged in fishing, restricted in her ability to manoeuvre, shooting nets OR a vessel engaged in towing, less than 50 metres in length, length of tow under 200 metres, towing vessel restricted in her ability to manoeuvre, seen head-on.

A power-driven vessel engaged in towing, less than 50 metres in length, length of tow under 200 metres, towing vessel and tow restricted in their ability to manoeuvre, seen head-on OR a power-driven vessel underway, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, restricted in her ability to manoeuvre, seen head-on.

A vessel engaged on pilotage duty, engaged in deploying or recovering a pilot, seen head-on or a power-driven vessel underway, lmore than 50 metres in length or less than 50 metres in length and showing the second masthead light, seen head-on.

An engine room rating is assisting the duty engineer during a period of UMS operation. After completing the tasks they have been busy with the engineer and rating leave the engine room which is returned to UMS mode. The rating realises that an oil tank filling valve has been left open. What action should be taken?

Inform another crewmember that he is going back into the engine room to close the valve.

Inform the duty engineer immediately so that the engine room can be re-entered and the valve can be shut.

Just leave the valve open as it is unsafe to enter the engine room alone. The high alarm will sound to notify the engineer when the tank is full.

Re-enter the engine room straight away and shut the valve.

The effective stability of a tug, when assisting a vessel to manoeuvre, can be decreased by hydrodynamic interaction with the ship it is assisting. Where is the most dangerous position of the tug relative to the ship, for this adverse affect to be found?

The most dangerous position is when the tug is alongside the amidships section of the larger vessel.

The most dangerous position is where the tug has made fast the towing spring and is then moving ahead of the larger vessel.

The most dangerous position is where the tug approaches the stern of the larger vessel and enters into its associated positive pressure field.

The most dangerous position is where the tug approaches the bow rounding the forward shoulder of the larger vessel.

What section of the Crew Agreement contains the “Contractual clauses”?

The ship's register

The inside page

ALC 6

ALC 1b

There are a number of standard reliquefaction plants commonly fitted onboard LPG and other liquefied gas carriers. What type of reliquefaction plant is required for a cargo of Ethylene Oxide?

Two-stage direct cycle.

Cascade direct cycle.

Indirect cycle.

Single-stage direct cycle.

What is the name by which the regulations which prevent and control pollution from ships are known?

The International Shipping Pollution Laws.

SOLAS

MARPOL

The ISP Code.

During inspection and calibration of one unit, you observe the situation shown. The conclusion is clover leafing. The main engine uses high grade TBN cylinder oil. What do you have to do in order to reduce wear?

Contact engine maker for advice.

Increase the jacket cooling water temperature to avoid the sulfur dew point

Decrease jacket cooling water temperature to avoid heat stress

Increase cylinder oil consumption to neutralize the sulfur

How many separate means of escape from passengers and crew spaces should it be in each zone?

One

Two

Four

Three

What is the time limit for abandonment of ro-ro passenger ships?

30 minutes from the time the abandon ship signal is given

15 minutes from the time the abandon ship signal is given

There is no time limit

2 hours from the time the abandon ship signal is given

If a master initially responds to a distress but then, in special circumstances, decides not to proceed, what must he then do?

Inform the appropriate search and rescue authorities of his decision and enter the reason in the ship's logbook.

Inform his owners of his decision and resume his passage at the earliest opportunity.

If possible, inform the casualty of his decision and communicate his reasons.

Contact the SAR Mission Co-ordinator and secure his written agreement to the release of his vessel from the operation.

What publication must be carried on a vessel carrying dry bulk cargoes?

Charters' Solid Bulk Cargoes Code?

IMO Solid Bulk cargo Code or IMO Solid Bulk?

International Tankers and Terminal Code?

Classification Society Grain Rules?

What is the purpose of introducing inert gas into cargo tanks?

To create a non-explosive atmosphere in the tank.

To reduce the static electricity potential in the tank.

To prevent evaporation of cargo.

To make the tank safe for entry.

On the figure 4 possible definitions of the term "AIR DRAUGHT" are given. Which one is the correct one?

Air draught is given by A on the figure

Air draught is given by D on the figure

Air draught is given by C on the figure

Air draught is given by B on the figure

What English name is given to a sauce or relish made of chopped fruit and vegetables with spices and herbs, commonly used as a complement to cold meats?

Kidney.

Preserve.

Conserve.

Chutney.

The circuit consists of two capacitors, C(1) = 6 µF and C(2) = 12 µF, in parallel. Calculate the equivalent C(S) of the two capacitors.

C(S) = 2 µF

C(S) = 1,5 µF

C(S) = 18 µF

C(S) = 4 µF

What is the maximum quantity of cargo permitted to be carried in a single tank on a type 1 chemical tanker as per the IBC Code?

2400 cubic metres.

3000 cubic metres.

1250 cubic metres.

750 cubic metres.

Consider the situation sketched below. What can happen if the tugmaster is not careful?

The tug may be turned across your bow with the danger of being turned over.

The stern of the tug may be sucked into your bow.

The tug may be pushed away from the ship and thus unable to assist your vessel.

The tugmaster may loose control and ram your bow with possible damage to your ship.

Chemicals and harmful substances are safely stored in a designated locker on board, why?

For stock control. Most of the chemicals and harmful substances we use on board are expensive.

For safety reasons. Many substances found onboard are capable of damaging the health and safety of those exposed to them. Before any chemical or harmful substance is delivered to a crewmember, the personnel shall receive training, instructions and information so that they know and understand the risks arising from use.

Chemicals and harmful substances must be kept away from passengers so that they don't steal it.

For safety reasons and stock control. When chemicals or harmful substances is delivered to a crewmember, the user shall sign for the amount received.

In describing the characteristics of oil cargoes or oil / water slops, what is a mercaptan?

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

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 "rotton egg" smell associated with certain grades.

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.

On a Container vessel, what is the function of a raised deck socket?

To house base twistlocks or stacking cones

To house stacking cones

To secure turnbuckles

To house base twistlocks

Which person is qualified to carry out a five yearly thorough survey of cargo gear on a General Cargo vessel?

The master

A classification society surveyor

A deck officer designated by the master

A marine surveyor

During bunker transfer operations, deck scuppers should be:

Plugged when required