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Heim Online-Tests CES Gas tanker Deck Support Test online CES 5.1 for Deck department, Support level, Gas tanker vessel
Online-Test: Test online CES 5.1 for Deck department, Support level, Gas tanker vessel
Online-Test
Beschreibung
Der Test besteht aus zufälligen Fragen zu einem ausgewählten Thema.
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To make a “call-request” one should:
select the ID of the NCS
select the telex in on-line position
select the telex in off-line position
Don't know
When cleaning cargo tanks with portable machines, how is the machine grounded?
The water jets impinging on the vessel-s structure form a pathway to ground.
Bonding wires are secured from the machine to a convenient location on deck.
The water supply hoses contain internal wires that act as conductors
The machines must maintain physical contact with the deck at the Butterworth opening.
When stripping a tank, if excessive air is allowed to be drawn into the suction line, which of the following may occur?
Control of the operation will be lost and the tank will rapidly empty.
The pump will "race" and there will be a loss of suction.
The cargo pump impeller will stop rotating.
The back pressure will increase.
After the start of a man overboard manoeuvre, whom shall be informed?
Chief Officer
Electrician
Engine Room
Galley
What would be the stopping distance of a VLCC when proceeding at 8 knots in deep water and the engines are put 'Full Astern'?
8 nautical miles
4 nautical miles
15 ship lengths
Varies, but can be determined from trial data
The rudder is in the hard over position with the propeller stopped and the ship turning slowly. On a ship with a single fixed pitch right handed propeller and no thrusters, what can be done to make the ship increase the speed of turn without significantly increasing the forward speed of the ship?
Give the engines a short kick ahead
Give full astern on the engines until ship has stopped and then full ahead on the engines with rudder hard over
Give dead slow ahead on the engines and leave the rudder in the hard over position.
Give half astern on the engines as this will increase the rate of turn
What transmitting equipment as a rule is not allowed for us in territorial waters:
Inmarsat-C transmitters
Inmarsat-A transmitters
Don't know
MF-transmitters
When you are taking an "ullage" on a cargo tank on an oil tanker, what are you actually doing?
Measuring the distance from the surface of the cargo to the ullage reference point
Measuring the distance from the bottom of the tank to the ullage reference point
Measuring the distance from the bottom of the tank to the surface of cargo
Measuring the distance from the surface of the cargo to the underside of the maindeck
From the statements given in the answer options, choose the one which is most accurate in relation to the operation of water-tube boiler and fire-tube boilers.
A watertube boiler can tolerate a short period of time without any water when the burner is operating.
A firetube boiler has a much better capability to work at higher steam pressure.
Water-tube boilers are more efficient and generally contain less water than fire tube boilers. They are prone to major damage when run dry during operation.
A firetube boiler does not require a non-return valve in the feedwater line.
What does this signal hoist mean?
I require immediate assistance.
Do you require assistance?
Stand by to assist me.
I require medical assistance.
A deep tank on a General Cargo ship has been cleaned after discharge of palm oil; what needs to be done to prepare the space for dry cargo?
Ladders checked, CO2 lines closed and temperature probes removed
Suction line blanked off, heating coils fitted and bilge system closed off
Heating coils removed, bilge suctions and CO2 lines opened and tested
Ballast lines opened up, ladders removed and air vents closed
Temperature sensors may be marked PT100. What does this mean?
100 ohm at 0° C
20 ohm at 100° C
100 ohm at 20° C
0ohm at 100° C
The data logger on a reefer vessel normally records temperatures for air delivery, air return and cargo pulp. How would the air delivery and return temperatures be expected to vary during the first few days of carrying a cargo of citrus fruit which had not been pre-cooled before loading?
The difference between the two temperatures would steadily increase.
The difference between the two temperatures would remain constant.
The two temperatures would remain constant
The difference between the two temperatures would steadily reduce.
How can you monitor the liquid level in the vapour line?
By use of a float switch or differential pressure in the liquid receiver
By monitoring the atmosphere in the vapour line with a fixed gas detector
There isn't any possibilities to monitor liquid in the vapour line
By monitoring the temperature in the vapour line on the compressors suction side
After washing cargo holds why are cargo residues often found on the tank top when hatches are opened at the load port?
Because the washing of cargo holds was not thorough
Because of poor drainage into the bilges
Because of cargo residues falling down due to ship’s vibrations during the ballast passage
Due to failure of the bilge eductors
Which of the following is typical for a feed-forward control system
We are controlling the process inlet side
The process is always oscillating
We can calculate the system response mathematically
It is easy to obtain a perfect control
What are some of the precautions that must be taken on a bulk carrier, before double - bottom tanks can be ballasted with sea water?
After peak tank and fore peak tank filled first
Correct valves opened, air ventilators open and ballasting plan agreed.
Cargo spaces empty of cargo
All hatch covers secured for sea
A deck patrol notices that a cargo space carrying refrigerated cargo under controlled atmosphere (CA) is not padlocked shut. Select, from the options given, the main reason why such a space should be kept locked.
It is a requirement of the ship security plan that such spaces should be locked.
To prevent unauthorised entry into the space because of the hazard risk due to low temperature in the space.
To prevent unauthorised entry into the space because of the hazard risk due to the low oxygen content of the controlled atmosphere in the space.
To minimise the occurrence of pilferage of a valuable cargo.
The chemical abbreviation "H2S" is often associated with Crude Oil cargoes. What does the abbreviation stand for?
Hydrogen Sour.
Hydrogen Separation - 2nd distillation stage.
Hydrogen Sulphide.
Halogenated Sulphide.
Semi-pressurised liquefied gas carriers are often fitted with direct, single stage reliquefaction plants for cooling the cargo and dealing with boil off vapours. What cooling medium is usually used in the condenser to condense the cargo vapours for this type of system?
Fresh water.
Sea water.
Refrigerant gas.
Air.
Why is it considered good practice to have a duty crew member stand by the loading ramp?
To guide ro-ro units onto the vessel
To supervise the stevedores
o record the nature and extent of any pre-loading damages to cargo
To supervise the rate of loading
Before engaging the Turning Gear, precautions should be taken to:
Open the indicator cocks and open the starting air supply
Close the inlet and outlet valves for cooling water
Transfer M/E control from control room to emergency control console of engine
Shut off the starting air supply and open the indicator cocks
Use of …… and …… is strictly prohibited onthe ro-ro deck, signs shall be displayed
Personal Protective Equipment and Mobile telephones
Naked lights and Smoking
Goggles and Smoking
Torches and Smoking
An airway should be used when
The patient is breathing on his own but is doing so with great difficulty
The patient has stopped breathing
Patient has injury in the mouth
The patient is unconscious
What is the full name of the International Convention dealing with stability of passenger ships?
The International Convention for the Safety of Life at Sea
International Safety Management code
SOLAS
ISPS
When preparing a cargo tank on a liquefied gas carrier for loading cargo following inspection of the tank a number of different steps are required. What is the first step required after such an inspection?
Inerting.
Drying.
Gassing up.
Cooling down.
What are the effects of a bulk vessel loading a high density cargo resulting in a large metacentric height (GM)?
Suffer torsional stresses and have small righting levers
Have a slow roll and very small righting levers
Have a fast roll period and possibly suffer racking stresses
Have a slow roll and large righting levers
What is the purpose of the ship/shore safety check list?
To ensure the safety of the personnel.
To ensure the safety of personnel, ship and terminal.
To ensure the ship is safe moored.
To avoid the avoidance of cargo contamination.
When cargo discharge reaches stripping levels on an oil tanker, it is necessary to reduce the inert gas pressure. Why is this?
To avoid over-capacity in the IG generator.
To avoid locking the cargo pump impeller.
To minimise blowback.
To comply with MARPOL Annex VI.
When should steel cargoes be ventilated?
When ambient air temperatures are rising
When passing from a cool to a relatively warm climate
When passing from a warm climate to a warmer climate
When ambient air temperatures are falling
One of the crossheads on a large, six cylinder, slow speed diesel engine has been severely damaged due to bearing failure. The connecting rod for the cylinder concerned is to be removed from the engine and the piston and damaged crosshead suspended in the engine so that it can be run on 5 cylinders. Which of the methods given in the options should be used to suspend the piston and crosshead?
Remove the cylinder cover and connect the piston (with crosshead attached) to the engine room crane and position the piston so that it covers the scavenge ports.
Raise the piston sufficiently high to allow the crosshead support pins/chains to be fitted and rest the crosshead on them (with piston attached and positioned above the scavenge ports)
Raise the piston (with crosshead attached) to just above the scavenge ports and insert pieces of wood through the ports to rest the piston on
Remove the cylinder cover and lift the piston until the crown and skirt are clear of the liner and place two bits of angle iron across the liner top to rest the piston on.
What is the most likely cause of black smoke at the boiler exhaust during normal operation of a steam boiler?
Water in the fuel.
Too much combustion air.
Insufficient combustion air.
Fuel oil temperature too high.
On a container vessel, when would a bulk liquid cargo carried in a flexitank container be considered dangerous?
When the associated material safety data sheet shows a constituent(s) listed in the IMDG Code
When declared as a non-hazardous chemical
When the shipper instructs that the container be carried on-deck only
When declared as bulk liquid foodstuff
Emergency instructions in appropriate languages shall be posted in passenger cabins. Which information shall as a minimum be included in the emergency instructions?
Name of cabin attendant
The method of donning life-jackets, escape routes and alarm signals
Where to find thermal protective aids
Escape routes and alarm signals
What are you normally calling the compressor that collects the boil-off from the header connected to each cargo tank?
The fuel-feeding compressor.
The low-duty compressor.
The high-duty compressor.
The medium-duty compressor.
How is ‘Allowable Use Strength’ (AUS) calculated, for applying cargo lashings in the transverse direction?
Transverse accelerations, taken from the CSS Code, multiplied by the vessel’s natural roll period
Vessel’s moulded breadth divided by a factor of safety, taken from the CSM, multiplied by weight of cargo item
Width of cargo hold divided by a factor of safety, taken from the Cargo Securing Manual (CSM), multiplied by weight of cargo item
Transverse accelerations, taken from the Cargo Stowage and Security (CSS) Code, divided by 7 multiplied by weight of cargo item
When discussing ther chemistry of petroleum cargoes, if 'Alkanes' are saturated hydrocarbons, what are unsaturated hydrocarbons?
They are also referred to as Alkanes.
Pentenes.
Alkenes.
Octanes.
Tank venting systems should be designed and operated so as to ensure neither pressure nor vacuum created in cargo tanks during loading or discharging exceeds tank design parameters. A certain rate of generation of vapour during loading, sometimes termed gas evolution, is assumed. According to the IBC Code, how is that calculated?
The nominal loading rate is multiplied by a factor of 1.15
The maximum loading rate is multiplied by a factor of at least 1.25
The average anticipated loading rate is multiplied by a factor of 2.0
The calculated loading rate, assuming a litreweight of 1.2 kg/l and allowing for a friction loss of 12% per 30 metre length of unrestricted pipeline, is multiplied by a factor of 1.15 (A safety margin of 20% is additionally applied for products with a vapour pressure of greater than 1.15 mPa).
When is it necessary to seal a CO2 injection line into the designated ballast hold?
When testing the CO2 system
Prior to ballasting the hold
When carrying non-inflammable cargoes
When handling cargoes that emit dust
When a changeover from HFO to diesel oil is going to take place, we want this to be carried out as follows:
as fast as possible to save HFO.
as fast as possible to save steam.
slow to get slow cooling.
as quick as possible, to obtain a fast temperature reduction to cool the HP fuelpumps.
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.
Fluid-driven eductors (as commonly found on crude oil tankers), operate on a principle known as Bernoulli's principle. What does that state?
The increase in pressure at the eductor inlet is inversely proportional to the decrease in pressure as measured at the discharge orifice.
The volume of a fluid increases as the pressure in it decreases.
The discharge rate is inversely proportional to the pressure applied in the drive inlet.
The speed of a moving fluid increases as the pressure in the fluid decreases.
What kind of fixed extinguishing plant is installed to use on an oil tanker’s engine room and pump room?
Powder plant.
CO2 plant.
Foam plant.
Water spray plant.
To which of the following ratios are transverse accelerations related?
Ship’s breadth divided by LCB
Ship’s breadth divided by the maximum righting lever
Ship’s breadth divided by GM
Ship’s breadth divided by the distance between cargo units and the ship's centreline
What is a "ladle"?
Part of a Steward's uniform.
A big spoon.
A type of bread roll.
A Mediterranean vegetable.
What roll amplitude is generally used by classification societies in calculating rolling forces?
24 - 30 degrees
18 - 24 degrees
37 - 42 degrees
30 - 36 degrees
What extra precautions should be taken by the officers and crew if some of the passengers are disabled, i.e. using wheelchair, cane, blind etc.?
Locate them in large cabins to ease their stay.
All passengers that will require extra assistance, also in case of an emergency situation/ evacuation, must be registered in order to allocate crew to assist them if needed.
Passenger with some form for disability must travel with accompany, and live in same cabin or next door.
They must be placed in cabins on the same level as the muster station.
Pitting corrosion is found around the steam drum water line of a high pressure steam boiler. From the options given, select the one most likely to cause this condition.
Dissolved oxygen levels are too high.
Seawater leakage from the condenser.
Total dissolved solids levels are too high.
Excess hydrazine dosage to the feed water system.
Indicate the correct name of the tool on the sketch:
Chisel
Drill press
File
Shaping machine
What dangers are associated with the carriage of empty tank containers?
They may not declared as being empty when in fact they are not
They could easily collapse due to being empty
They may contain flammable cargo residue
They could explode if their vents are closed
Maintenance of lifeboats and davit arrangements is routine work onboard. Why should you not carry out this type of work alone?
It is boring to work alone and you should be able to chat with colleagues while working
If you need something to drink, the second person can get it for you
If the person working on the lifeboat falls over board, the second person can lower the lifeboat and prepare pick-up immediately
There might be a risk of falling even though harness and lifeline is used. A second person should always stand by to assist with tools etc. and other practical arrangements.
The physical size of a resistor is an indicator of its
Power dissipation capability
Tolerance
Total resistance
Resistivity
On a RoRo vessel, what is important with regard to a loading ramp resting on a jetty?
The position of mats between the ramp flap and jetty must be maintained at all times
Visitors must not be allowed access to the vessel via the ramp
The ramp's position must be maintained
It must not foul the ship's mooring ropes
The figures show a graphical symbol for a particular electronic component and a typical operating characteristic for the same. Which component?
Zener diode
Transistor
Tunnel diode
Thyristor
Cargo hoses intended for liquefied gas carriers have to be prototyped tested before being approved. When new hoses of an already approved type are received onboard they also need to be pressure tested before being put into service. What are the IMO Gas Code requirements for such hoses before they are put into service?
Not less than 1.5 times the specified maximum working pressure or more than two fifths of bursting pressure at the expected cargo carriage temperature.
5 times the specified maximum working pressure at ambient temperature.
5 times the specified maximum working pressure at expected cargo carriage temperature.
Not less than 1.5 times the specified maximum working pressure or more than two fifths of bursting pressure at ambient temperature.
One of the purposes to MARPOL Annex I is to:
Ensure that the ships certificates are valid.
The tanker is en-route and meets certain discharging conditions.
Prevent operational oil pollution by providing ships with discharge criteria and other guidelines to follow.
Prevent sea-going incident involving tankers.
When describing Crude Oil Washing on an oil tanker, what name is given to areas within a cargo tank that are not directly impinged, or hit by the stream from tank washing machines?
Shadow areas
Protected areas
Deflected areas
Hidden areas
During sea passage how would one know if gasoline vapours were escaping from vehicles/ro-ro units?
By using oxygen meters in the vehicle/ro-ro decks
By using carbon monoxide meters in the vehicle/ro-ro decks
By sense of smell
By using flammable gas detectors in the vehicle/ro-ro decks
What is the punishment for a master or any other person in authority on board a ship if he or she treats a person carried on the ship in an improper manner or fails to prevent his being so treated by other persons onboard?
Shall bi liable to imprisonment for a term not exceeding 9 months.
Shall bi liable to fines.
Shall bi liable to fines or imprisonment for a term not exceeding 6 months.
Shall bi liable to fines or imprisonment for a term not exceeding 12 months.
Electric ozone generators are sometimes used to remove residual odours from refrigerated cargo spaces. Which of the options given is the additional action required to ensure the operation is successful?
The cargo space should be cooled down using the refrigeration plant.
The cargo space should be fumigated.
The fans should be run continuously in the cargo space.
The source of the odour must be located and removed.
A three phase alternator is connected singularly to the main switchboard. The switchboard instruments show 400 Volts/500 amperes. With a power factor of 0.5 what will be the kW load?
100 kW
57.5 kW
250 kW
173.2 kW
When loaded to what depth can bulk carriers constructed after 1 July 1999 withstand flooding of any one cargo hold?
The Tropical loadline
The Winter North Atlantic loadline
The Winter loadline
The Summer loadline
On a flue gas plant, the flue gas enters a washing tower where the gas is washed to remove soot, ashes and to separate undesired gases. What is the name of this «washing tower»?
Inert gas washer.
The washing tower.
Scrubber.
Cleaning tower.
What must be done after completion of ballasting operations on a bulk carrier?
All valves closed, tank ventilators in open position and sounding pipe caps replaced.
Sounding pipe caps left off
All valves and lines left open
All valves closed and tank ventilators to closed position
A vessel is scheduled to enter a SECA during a forthcoming voyage? What additional considerations must a Chief Engineer take into account when planning for this voyage?
That all garbage is fully disposed of prior to entry into the SECA and suitable arrangements are made for retention while in the SECA.
That there is sufficient room in the bilge holding tank to ensure no discharges of machinery space bilges takes place while the vessel is in the SECA.
That the incinerator is shut down for the duration of the time the vessel is in the SECA.
The availability of low sulphur fuel and the change over time required to ensure the system is clear of normal fuel prior to entry into the SECA.
When an engine is working normally, the lubricating oil return temperatures are moderate and the running temperatures of the moving parts are also moderate. Lubricating oil is not a volatile liquid and the temperature inside the crankcase is insufficiently high to cause concentration of vapor. What would be the flash point of the lubricating oil?
Above 250 deg C
Above 150 deg C
Above 100 deg C
Above 200 deg C
Which inert gas systems use only gases from the ship's main or auxiliary boilers?
The inert gas generator
Nitrogen generator
Combination - inert systems
The flue gas plant
Which statement is correct for a fire door class "A-60"?
It is a requirement to keep class "A-60" fire doors closed for minimum 60 minutes
Class "A-60" fire doors shall be capable of preventing the passage of flame for minimum 60 minutes
Class "A-60" fire doors shall prevent the passage of smoke and flame and the average temperature of the unexposed side shall not rise more than 180
Class "A-60" fire doors must be closed within 60 seconds
Which of the given options is IMO's definition of liquefied gas as used in its Gas Codes?
Liquid with vapour pressure exceeding 2.8 bar absolute at a temperature of 73.8 C.
Liquid with vapour pressure exceeding 2.8 bar absolute at a temperature of 37.8 C.
Liquid with vapour pressure exceeding 1.8 bar absolute at a temperature of 38.7 C.
Liquid with vapour pressure exceeding 1.8 bar absolute at a temperature of 87.3 C.
Simple gauge glasses for indicating the boiler water level, such as the one shown here, are often fitted to low pressure boilers. What would be a reasonable schedule for blowing through the gauge glasses?
Once an hour
Once a month.
Once a day
Once a week
When securing cars on a RoRo vessel, what is the preferred lashing angle in any direction from the lashing point?
20 degrees
45 degrees
25 degrees
15 degrees
The cargo manifold working platform surface should be made of:
Chequer plate
Perforated steel sheet
Open mesh grating
Wooden laminate
What is the purpose of Material Safety Data Sheets?
To provide all personnel including emergency personnel with procedures for handling or working with that substance in a safe manner
To provide personnel in deck- and engine department with procedures for handling or working with that substance in a safe manner
To provide the safety officer with procedures for handling or working with that substance in a safe manner
To determine if the substance is flammable or not
Data loggers are a vital part of the temperature control and monitoring system on a reefer vessel. In a situation where the data logger fails several days before the end of the voyage it is still necessary to maintain control of and monitor cargo temperatures. How could an accurate, portable thermometer be used to the best effect, to achieve this, in such a situation?
Use the thermometer to maintain the delivery air settings as they were prior to the data logger breaking down.
Use the thermometer to check the pulp temperature by entering the cargo space and placing it in the centre of the stow.
Use the thermometer to check and control the delivery air temperature by inserting it in the delivery air ducting close to the evaporators.
Use the thermometer to check and control the return air temperature by holding it in the return air space on top of the cargo.
There are two basic types of turbocharging systems: constant pressure and pulse. The main difference between the two is in which of the following?
The arrangement of exhaust piping and exhaust gas receiver.
The casing of the turbocharger.
The arrangement of the scavenging air coolers.
The scavenging valves of the engine.
The International Convention for the Prevention of Pollution from Ships (MARPOL) covers detailed regulations to prevent various sources of ship generated pollution. Annex I - VI deals with regulations for the prevention/ control of pollution from:
All Harmful Substances we have onboard
Proper Pollution Prevention Training
Harmful Substances in Packaged Form, Sewage, Air Pollution, Garbage, Oil and Noxious Liquid Substances in Bulk
Oil, Noxious Liquid Substances in Bulk, Harmful Substances in Packaged Form, Sewage, Garbage and Ballast Water
From the options given, select the one which best completes the following statement. "A seaman who is required to work in a hatch containing perishable goods should wear gloves that are…
…canvas."
…leather palmed."
…clean."
…insulated."
What is important to wear for all officers and crew when working on the ro-ro deck during loading and discharging?
Rain coat
Gloves
Goggles and safety shoes
Fluorescent vest/ working clothes
What should crew members not assigned to emergency teams, do?
Crew members not asigned to emergency teams should ensure the proper operation of the remote control equipment
Crew members not asigned to emergency teams should be ready to assist the engine-room emergency team
Crew members not asigned to emergency teams should be integrated in the emergency team
Crew members not asigned to emergency teams should prepare survival crafts and render assistance, where required
What does this flag mean?
My vessel is stopped and making no way through the water.
Yes (affirmative).
I wish to communicate with you.
I have a diver down; keep well clear at slow speed.
While on boiler watch in the engine room a rating is requested to assist with taking on stores. The task will take about half an hour. What should the rating do?
Just ignore the request to assist with the stores.
Go and help with the stores but go back and check the boiler every 10 minutes.
Raise the boiler water level above normal to make sure there is sufficient water while he is busy with the stores.
Contact the engineering officer of the watch for permission to assist and to arrange a relief for the duration of the store taking.
Which would be the most suitable point in the system to obtain a representative of diesel engine lubricating oil for analysis?
From the lubricating system pipeline on the discharge side of the circulating pump.
From the lubricating oil filter drain.
From the lubricating oil cooler drain.
From the lubricating oil purifier outlet.
The circuit shows a full-wave bridge rectifier. Which electronic component will you connect between 'a' and 'b' in order to obtain reduced ripple voltage to the load RL.
Zener diode
Capacitor
Inductive reactor
Resistance
Why should vehicles stowed on ramps face downwards?
To facilitate cargo discharge operations
To facilitate cargo stowage operations
To prevent fuel draining from the engine
To prevent excessive tyre compression
Is it possible to discharge a fully-refrigerated gas carrier if brake down on a discharge pump?
Fully-refrigerated gas carrier can be discharged by condensate the cargo to shore or another cargo tank or let it boil off
We can not discharge any gas carriers without pumps
Fully-refrigerated gas carrier can be discharged by pressurising the cargo tanks
Fully-refrigerated gas carrier can be discharged by using a spare discharge pump lowered down in the cargo tank
Why must inert gas from a combustion-type generator never be used when preparing cargo tanks for ammonia?
Because of the high oxygen content in inert gas.
Because ammonia reacts with the carbon dioxide in inert gas.
Because of the high water content in inert gas.
Because of the high temperature in inert gas.
A reefer vessel, which is about to carry a palletised cargo, has to have available sufficient cargo equipment including air bags (dunnage bags), air lines and valves, cargo slings, wooden dunnage, nails, etc. These items are required to ensure a quick loading operation and a successful passage. Complete the following statement from the options given. "Air bags are particularly important in that ….
… they are quick and easy to deploy."
… they secure the pallets against movement during the passage."
… they protect the pillars and the vent trunking against damage during heavy weather."
… they reduce the movement of the pallets and prevent short circuiting of the air flow."
The revolutions on the turbocharger have increased during the night with unmanned engine. Could this be caused by:
Poor combustion due to malfunction of fuel valves.
The current and wind are holding the vessel back
The viscosity of the fuel is to high
We have favorable winds and current
When should gangway nets be rigged?
When it is deemed necessary by the Master or the Chief Officer.
Between sunset and sunrise.
Whenever the gangway is regarded as unsafe.
Whenever the gangway is rigged.
Do we need insulation on cargo tanks on semi-refrigerated gas carriers?
Yes, to avoid cold cargo to came in contact with the ship construction
Yes, to avoid heat transfer to the cargo in the tank
Yes, to save fuel when we carry cold cargo
Yes, when we carry cold cargoes
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