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Maison Tests en ligne CES Oil tanker Deck Support Test online CES 5.1 for Deck department, Support level, Oil tanker vessel
Tests en ligne : Test online CES 5.1 for Deck department, Support level, Oil tanker vessel
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Description
Le test consiste en des questions aléatoires sur un sujet sélectionné.
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While the vessel is in a Red Sea port during August loading/discharging a hydrocarbon cargo, should the air suction for the accommodation be:
Placed on full recirculation.
Recirk. full open, fresh air intake closed.
A mixture of both.
Closed down all together.
By a ‘geographical area call’ in the DSC system is meant:
Don't know
a DSC message for all vessels within a certain area from a position in the DSC message, and the degrees are given in northerly and westerly direction
a DSC message for all ships heading towards a certain geographical area
a DSC-message for all vessels within certain area marked by areference position, given in the DSC message and the degrees are given in southerly and easterly direction
For a DSC-connection (no ‘distress alert’) with another vessel the following frequencies are used:
TX: 2187.5 kHz RX: 2187.5 kHz
Tx: 2187.5 kHz RX: 2182.0 kHz
TX: 2189.5 kHz RX: 2189.5 kHz
TX: 2177.0 kHz RX: 2177.0 kHz
By “collect call” is meant:
a call for account of the receiver
an urgent call
Don't know
a group call
Which of the following requirements to ships stability for normal operation corresponds to present regulations? (NSCL 4/12.2)
Centre of gravity shall be calculated with an accurancy better than 5 percent.
The ship is loaded in such a manner that adequate stability is achieved in all loading condition.
I waters with the danger of icing, loading of deck cargo must be approved by competent authority.
Unless othereays stated in the approved stability calculation, the total weight of the deck cargo shall not exeed 50 metric tons.
When a vessel is to experience a long tow across an ocean, what would be the best system of connecting the tow?
Towing Hawser from a deep sea tug through the centre lead forward and made fast on the nearest mooring bits forward.
Wire from a deep sea tug made fast through a shoulder lead on the vessel's leeward side
Wire from a deep sea tug through the forward centre lead of the ship and made fast onto several mooring bits on the forecastle
Wire from a deep sea tug connected to the ship's anchor chain.
You are drifting in open sea with a loaded VLCC, and you observe that the drift is SSE. Will the drift direction be the same for ballast condition?
Yes, it will be the same
In ballast condition the drift will be more to the east
No, drifting in ballast condition may be quite different
Loaded or ballast conditions have no effect on the drift
You are drifting with a loaded VLCC in open sea. You have observed the direction and rate of drift. Can you do anything to change the direction and rate of drift?
We will just have to wait and see
We can apply the rudder although we have no engine power
No, there is nothing I can do about that
We can trim the ship by stern as much as possible. This will most likely change the direction and rate of drift.
When a ship is steaming along a course line, what is the importance of determining the set and rate of drift due to wind and current?
All of the suggested answers
To appreciate the possible extent of drift and dangers in the event of engine failure
To determine the time required to reach the next alteration of course point.
To determine the correction required to the course steered to maintain the planned passage.
A ship is not turning around the center of gravity, but another point. What is the point called?
Point of radius
Pivot point
Point of turning
Point of no return
A tug is connected in a line at your bow. Will the bollard pull be the same at any speed?
Yes, the bollard is the same at any speed
No, when the speed exceeds 5 knots we have not much help in a tug
No, when the speed is increasing, the bollard is also increasing
We will have the best use of the tug when the ship makes sternway
In the case when the temperature of the ambient air is equal to 10°C and the wind is blowing at a speed of 10m/sec the shipwrecked person must consider that the effect of air on his body is equivalent to that of an air whose temperature would be approximately:
+10°C
+20°C
0°C
-10°C
What determines how containers should be lashed?
Advice from shore planners
OSHA regulations
SOLAS 74/88
The cargo securing manual
Indicate the correct name for the tool on the sketch:
Grinding machine
Flat file
Chisel
Pliers
If a vessel is rolling heavily in a seaway and has negative GM and a small Angle of Loll, describe how the vessel will roll.
Roll unevenly flopping over between the Angle of Loll on each side.
Roll evenly either side of the upright position.
Roll evenly each side of the Angle of Loll.
Roll between the Angle of Loll on each side.
What is the purpose of the deck water seal on the deck of an oil tanker?
To prevent the passage of petroleum gases back to the machinery spaces.
To automatically compensate for temporary fluctuations in inert gas pressure within the cargo spaces.
To provide a second washing cycle to inert gas.
To automatically adjust the inert gas flow.
Fast rescue boats shall be capable of carrying:
10 Persons
At least 5 seated persons and a person lying down
At least 6 persons seated
3 Persons
How many rescue boats should be provided on passenger ships of 500 gross tons and above?
None
Two, and at least one of the rescue boats shall be a Fast Rescue Boat
One Fast Rescue Boat
Two, one on each side of the ship
Discharge of a frozen cargo is about to start from a conventional reefer vessel. Select, from the options given, the best procedure to follow to ensure good cargo care.
The fans should be run at slow speed for one hour before discharge commences.
The fans should be kept running throughout discharge.
The fans should be kept running after the hatch is open until the stevedores enter the hatch.
The fans should be stopped just before the hatch lids are raised for opening.
A conventional reefer vessel fitted with derricks has four large diameter Yokohama fenders supplied by the charterer. What kind of cargo operation from those given in the options is the vessel most likely being chartered for?
Loading at a dock equipped with poor fendering.
Loading cargo from barges.
Transhipment in the open sea directly from fishing boats.
Loading at a dock which experiences a large tidal range and at which strong winds are common.
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
At what temperature would you expect to carry a fully refrigerated cargo of butane?
- 43° C
- 23° C
- 15° C
- 4° C
Your vessel is equipped with fixed rotating tank-cleaning machines in every tank. You have just finished cleaning, in preparation for loading a cargo which is water-sensitive. What should you do with the machines?
It is not necessary to do anything. The amount of moisture remaining in a tank-cleaning machine could not affect the quality of the cargo in any way.
Ensure they are thoroughly drained down and blown through, using de-humidified air or nitrogen as applicable.
The nozzles and drain holes should be plugged.
They should be removed from the tank.
What is the substance added to a dough mixture to make it rise, during the baking of bread?
Feast.
Fungus.
Yeast.
Geest.
In a purifier assuming the separating temperature is correct, what is probably wrong if processed oil contains water
Back pressure is too high
Gravity disc is too small. Flow rate is too high
Gravity disc is too small
Gravity disc is too large
What is the correct definition of "gangway"?
Portable bridge between ship and shore.
A way to handle gangs.
A gangway to the waterline.
The way between two gangs.
What is enthalpy?
Enthalpy is the sum of the external energy of a substance plus the product of the substance volume multiplied by the pressure exerted on the substance by it’s surroundings.
Enthalpy is the difference between the compressor suction temperature and the condensate return temperature.
Enthalpy is the sum of the internal energy of a substance plus the product of the substance volume multiplied by the pressure exerted on the substance by it’s surroundings.
Enthalpy is the sum of the internal and external energy of a substance plus the product of the substance volume multiplied by the pressure exerted on the substance by it’s surroundings.
Pump rooms on oil tankers shall be provided with a fixed fire-extinguishing system. Which of the following systems is in accordance with present regulations? (SOLAS II-2/63)
Fixed pressure water spraying system
Fixed high expansion foam system
Fixed CO2 fire-extinguisher system
Fixed powder fire-extinguishing system
How would you determine whether a particular cargo transfer hose was compatible with the chemical product to be transferred?
Refer to the product entry in the hose manufacturer's chemical resistance chart.
Check the product classification mark stamped on the flange collar of the hose.
Check the colour of the hose against the general classification code in the IBC Code.
There will be no need to check. If the hose has been supplied to a chemical tanker, it will have been certified for the transfer of all chemical products.
Most search patterns consists of:
Vertical tracks
Parallel track covering a rectangular area
Horizontal tracks
Vertical and horizontal tracks
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
Which of the following groups of chemical cargoes is particularly susceptible to polymerisation, especially through exposure to heat?
Aliphatic Amines.
Paraffins.
Aldehydes.
Monomers.
When documenting Crude Oil Washing operations in the Oil Record Book, which of the following must be included in the sequence of entries?
The ullage in the tank at the commencement of washing
The ship's speed during the washing operation
The method of establishing that the cargo tanks were dry
The average oil cargo temperature during the washing operation
A mixed cargo consisting of cartons of frozen meat and drums of frozen orange juice is being loaded into the same reefer space. From the options given, select the reason that best describes why the drums of orange juice must be handled carefully.
There may be contact damage to the cartons of meat from the steel drums of orange juice.
There is a risk that the meat could taint the orange juice.
There is a risk of spillage from the drums of orange juice which may taint the meat.
There may be contact damage to the steel drums of orange juice from the cartons of meat.
What is the main purpose of routine testing of cooling water?
To ensure that the proper residuals of treatment chemicals, as specified, are maintained at all times
To detect dissolved oxygen in the water
To measure the pH - value of the water
To detect presence of contaminants in the water
Which of the following detectors would you choose for measuring the torque of a steel shaft?
Pyrometer
Strain gauge
Ultrasonic gauge
Synchro
A conventional reefer vessel operating a Controlled Atmosphere (CA) is approaching the port of discharge in Northern Europe. Which is the most suitable action to take from the options given?
Turn off the CA plant just prior to the start of discharge operations.
Continue to apply CA throughout the discharge to maintain the condition of the cargo.
Continue to apply CA until the hatches are opened to maintain the condition of the cargo.
Turn off the CA plant and thoroughly ventilate the cargo spaces under CA with fresh air just prior to arrival.
Which of the following options would be a typical pressure setting for a main engine slow down in the event of jacket cooling water system low pressure?
0.2 to 0.5 bar
1to 2 bar.
10 Bar
5 Bar
A refrigerated container is loaded on deck. On inspection it is noted that the door seals are damaged. Select, from the options given, the main reason why it is unacceptable to have a refrigerated container in such a condition.
If the door seal is damaged the cargo packaging may become watermarked.
If the door seal is damaged the cargo may spoil due to ingress of warm air.
The refrigeration unit will run for more time than is normal.
The refrigeration unit will ice up to a greater extent than normal.
A cargo of steel swarf and borings (waste steel material from industrial processes) carried on a Bulk Carrier, is particularly liable to what?
Cargo sweat and reduced c carbon dioxide levels
A rise in methane gas levels
Production of carbon monoxide and oxygen
Oxygen depletion in the cargo space and self-heating of the cargo
What measures should be taken in order to avoid flammable gases forming on top of coal cargoes on a Bulk Carrier?
Ventilation to be continuous?
Ventilation to be carried out as indicated in the IMO solid Bulk Cargo Code
Cargo to be ventilated by opening hatch covers at sea?
Cargo not to be ventilated?
The seating surface of a superheater handhole door on a boiler has been damaged due to leakage of superheated steam leaving a cut across the surface. Which repair method, from the options given, would be the most effective?
Machine the surface until the cut has been removed and a new full seating area is formed.
Fit a more pliable gasket to take up the irregularities in the surface.
Build up the cut with weld and re-machine the seat.
Fill the cut with plastic metal and file smooth.
What does the acronym MARVS stand for in relation to liquefied gas carriers?
Maximum Allowed Relief Valve Setting.
Maximum Actual Relief Valve Setting.
Minimum Allowed Relief Valve Setting.
Maximum Automatic Relief Valve Setting.
What weakens a turnbuckle?
Pitting
A bent locking nut
A fully extended spindle
Lack of grease
Select the option which correctly completes the following statement. 'Prior to allowing work to proceed in an onboard space testing of the atmosphere should be carried out…
…for any space with limited access or non-continuous ventilation or is suspected of having a hazardous atmosphere.
…only if the space has been used to carry any cargo or contains any cargo related equipment.
..only if the space has contained liquid oil at some point.
…only if the space has a watertight door or watertight access opening.
You have been tank-cleaning at sea and are about to arrive in port and go alongside the terminal for loading several grades of chemicals. Many of the lines (headers) have been open for drying and inspection, but will not be required for this particular operation. What should you do with them?
Fit and secure a blank flange to every line that is not required.
Leave the blank flanges off, but hang a label over each line that will not be required, stating "not to be used this port".
Leave the lines open, but tie-off (or otherwise secure) the manifold valves so that they can not be operated by accident.
Leave the lines open to prevent condensation building up inside.
Perishable cargo is usually stowed on wooden pallets. The pallets are designed for either two-way or four-way fork lift entry. From the point of view of use on a refrigerated vessel, choose the option which highlights the most important difference between these two types of pallet.
The four-way pallet uses less material.
The two-way pallet is more robust.
The two way pallet is easier to construct.
It does not matter which way around the four-way pallet is stowed.
What does the Chief Mate want the OS to do?
He wants the OS to turn the switch to start, just to be sure
He wants the OS to show him the switch identical to the one the 2nd Mate showed him
He wants the OS to show him where the switch that changes between automatic, manual, and emergency steering is
He wants the OS to show him how to handle the wheel
What is the difference between methane and ethane?
Ethane has two more carbon atoms and two more hydrogen atoms.
Ethane has double bonding between the atoms.
Ethane has two more carbon atoms and one more hydrogen atoms.
Ethane has one more carbon atoms and two more hydrogen atoms.
Where shall you be able to activate the ship security alert system on board ro-ro passenger ships?
Navigation bridge
Captain's- and Chief Officer's office
Captain's office
From the navigation bridge and in at least one other location
With reference to using centrifuges for cleaning fuel and lubricating oil what is the difference between a purifier and a clarifier.
Clarifiers are used when water is present in the oil.
In a clarifier only solids are removed from the oil, whereas in a purifier both solids and water are removed from the oil
Purifiers are used when only solids are present in the oil.
There is no difference, both use centrifugal force
With reference to non-VIT diesel engine high pressure fuel pumps that have helix control, how is the timing of fuel injection normally adjusted?
By raising or lowering the pump plunger relative to the pump barrel.
By rotating the pump plunger relative to the pump barrel.
By changing the governor output signal.
By changing the opening pressure setting for the fuel injection valves.
Which electronic component is this graphical symbol illustrating:
Resistance, 3300 ohms
Capacitor, 3.3 F
Electric heater, 3.3 kilowatts
Inductive reactor, 3.3 kH
A positive displacement, rotary type, volumetric flow meter reads low with an error reading of 1% when used to measure flow of heavy oil and 2.5% when used to measure the flow of diesel oil. From the options given select the most likely cause of this difference in error?
The lower mass of diesel oil results in a lower reading.
The higher viscosity of the heavy oil is slowing down the rotary element in the meter.
The low lubricity of the diesel oil is increasing the friction in the rotating element and slowing the rotor down.
The meter is worn internally.
On oil tankers, what is generally used to control the safety of the atmosphere in the cargo tanks?
Inert Gas
Water
Nitrogen
Hydrogen Sulphide
The ship's crew are supervising the stevedores loading a non-palletized, break bulk cargo of fruit packed in cartons onto a conventional reefer vessel. Select the best type of stow to achieve good carriage conditions for the cargo from the options given.
A very loose stow leaving large gaps between the cartons for the cold air to circulate between them.
A loose stow leaving small gaps between the cartons for the cold air to circulate between them.
A very tight stow where the last few cartons are forced into existing rows to prevent any movement.
A tight stow leaving no space between the cartons so that the cold air is forced through the fruit in the cartons.
What is the main purpose of having a deaerator in a boiler feed water system?
To remove oxygen and other dissolved gases from the feed water.
To provide a dosage point for feed water treatment.
To reduce the total dissolved solids in the feed water.
Toact as the primary feed heater.
This graphical symbol is a logic gate with truth table. Which gate?
NOR
AND
NAND
OR
When can a vessel load concentrates whose moisture content exceeds the Transportable Moisture Limit?
When proved to an Administration that there is adequate stability
When the distance to the next port is less than 200nm
When proved to an Administration that there is adequate structural integrity
When proved to an Administration that there is adequate stability as well as structural integrity
What is the meaning of "make fast"
To secure a rope
To coil a rope
To avoid all meals
To act quickly
You are going to inspect a fresh water tank together with one of the Engineers. Is it safe enough to open the manhole and enter the tank (it is only fresh water) or do you have to take extra precautions before entering?
Make sure that the tank/ enclosed space is gas free, ventilated and the oxygen content is measured. O2 content shall be 21% before entering the tank/ enclosed space
Bring a flashlight and put on safety shoes
Use a breathing apparatus if the oxygen level is below 21%
Remember to have a colleague standing by to assist you if any problems
What is lateral drag with reference to operations on a General Cargo ship?
Heel caused by a ship being pushed onto or pulled off a berth
Hull resistance when a ship is being pushed onto or pulled off a berth
Movement of cargo longitudinally across a vessel
The sideways movement of a heavy load after its weight has been transferred to the ship's lifting gear
In the event of an accidental or other exceptional discharge into the sea of a Noxious Liquid Substance or mixture containing such a substance, an entry shall be made in the Cargo record Book. What details must be recorded?
Position at start of accidental discharge; Position at stop of accidental discharge; time at start of accidental discharge; time at stop of accidental discharge; reason for accidental discharge; name of Person in Charge of operation at time of accidental discharge.
Date of occurrence; position (latitute and longitude); estimated quantity; Category (ies); extract from Log Book detailing the incident.
Time of occurrence; Approximate quantity, substance(s) and Category(ies); Circumstances of discharge or escape and general remarks.
Date of occurrence; Time of Occurrence; Name of Responsible Person; Name of Master; Statement of Responsible Person; Statement of Master; Approximate quantity of product discharged; Category of product discharged; identity of nearest sovereign State and Authority of that State contacted with applicable report reference.
Why is the overboard discharge outlet on a chemical tanker located below the waterline?
To prevent damage to the hull paint by any chemicals that might be blown back against the ship's side.
So that personnel on board are protected from hazardous vapours by a layer of seawater.
So that tank cleaning can be carried out without anyone noticing.
To ensure that the cargo residues pumped out during tank washing are thoroughly dissolved and distributed in the ship's wake.
You are going to serve boiled potatoes with the evening meal at 18:00 hours. At what time should you have the potatoes ready?
17:30 hours
17:50 hours
17:00 hours
18:15 hours
With the exception of some citrus fruits and bananas, fruit is usually pre-cooled to the required carriage temperature prior to loading on a reefer vessel. In order to protect the cold chain, and to maintain the temperature of the fruit, a minimum exposure time to ambient conditions during loading is necessary. What action should the deck officers take during loading to achieve this minimum exposure time?
Close the hatches and apply cooling to the cargo already loaded during any break in cargo operations that exceed 30 minutes.
Request that the stevedores work faster to minimise loading time.
Close the hatches for any break in cargo operations that exceed 60 minutes.
Close the hatches and apply cooling to the cargo already loaded during any overnight break in cargo operations.
Which of the International Maritime Organisation (IMO) Codes contains information regarding the Construction and Equipment of Ships carrying Liquefied Gas in Bulk?
In the IBC Code.
In the IGC Code.
In the IMSBC Code.
In the IMDG Code.
The pressure control of a vessel's domestic water system, which includes a hydrophore tank pressurised by air, is achieved by stop/start of the fresh water pumps using pressure switches. How should the system be prepared for first use to give correct operation of the pressure control?
Fill the hydrophore tank to approximately 75% full with water and then pressurise with air up to the pump cut out point.
Fill the hydrophore tank up with freshwater allowing it to compress the air already in the tank and then adjust the pump cut out to match the pressure in the tank when it is almost full.
Pressurise the hydrophore tank with air to approximately 50% of the pump cut out pressure and then allow the pump to fill the tank until it cuts out.
Fill the hydrophore tank completely with water and then pressurise with air up to the pump cut out point.
Why is it dangerous to load wet Scrap Steel in containers?
Because of the huge increase in the weight of the cargo
Because the cargo will corrode the container
Because the cargo can spontaneously ignite
Because the cargo will not dry out en route
The recommended distance between parallel tracks (track spacing) in a search for a casualty by a surface vessel varies (amongst other factors) according to visibility and the nature of the target in the IAMSAR Manual. These distances are then normally adjusted for prevailing weather conditions. If visibility was 5 nautical miles and you were looking for a six-person liferaft, what would the recommended uncorrected track spacing be?
2.5 nautical miles.
5.0 nautical miles.
3.6 nautical miles.
0.7 nautical miles.
During overhaul of a hydraulic pump a large number of small components are removed. Where should these components be kept so that they are not lost and are available when rebuilding the pump?
They should be kept in a boiler suit pocket.
They should be placed in the pump save all.
They should be placed in a clean box or tin and covered over.
They should be placed inside the pump casing.
How often shall liferafts be serviced?
Decided by the safety officer
At intervals not exceeding 12 months
At intervals not exceeding 18 months
Every second year
After discharge of a bulk cargo by grabs, tank tops and lower hopper side plating must be checked for ?
Rusting
Damage and possible leaks
Paint coating loss
Cargo residues
What is the primary hazard associated with the carriage of a bulk cargo of salt on a Bulk Carrier?
There are no special hazards associated with this cargo
The cargo may be liable to self heat.
The only possible hazard is associated with ingress of water into the hold and a loss of stability
This cargo maybe liable to spontaneous combustion
What is the most common way of handling the LNG boil off gas?
The boil off is let to the atmosphere.
It used as fuel for the main engine.
It used as fuel for the boiler.
It is liquefied and directed back to the cargo tank.
Why should all bulk cargoes be trimmed and levelled on completion of loading?
To assist in the discharge
To prevent flammable gasses being generated
To reduce the possibilities of the cargo shifting at sea
To reduce the risk of cargo damage on passage
Does OPA90 apply to vessels engaged in carrying liquefied gas?
OPA90 applies only to oil tankers.
OPA90 applies only to non-American flag vessels.
Only if the vessel carry HC-products.
OPA90 applies to all ships.
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 action should be taken, in addition to isolating the leak, if the boiler water has become contaminated with a small amount of fuel oil due to a leaking heating coil?
Do nothing, a small amount of oil in the boiler is harmless..
Dose with coagulant and give the boiler a bottom blowdown.
Dose with coagulant and continue to operate the boiler as normal.
Dose with coagulant and surface blow the boiler.
Inspection of the LP turbine rotor reveals some erosion damage to the blading on the final stage. Which of the given options is most likely to be the cause of this condition?
Steam inlet to the turbine superheat temperature low.
Steam inlet to the turbine pressure too low.
Excess LP bleed steam take off.
Total dissolved solids in the boiler too high.
What name is given to the fine layer of peel on citrus fruits, often scraped off and added to other dishes to add flavour?
Cest.
Xest.
Zest.
Sest.
A plate type heat exchanger in a central cooling system has seawater leaking around the edges of some of the titanium plates. After inspection and reassembly following the manufacturer's instructions the problem still exists. What action, from the options given, should be taken to rectify the problem?
Fit new gaskets to the each of the plates.
Keep tightening the plate stack until the leakage stops.
Reduce the pressure of the sea water.
Scrap the plates and replace with a new plate stack.
The bottom end bolts employed in 4 stroke diesel engines are usually given a finite life and must be replaced periodically. What would be the normal failure mode that would affect these bolts if they were not replaced as required?
Failure due to torsional stresses
Failure due to bending stresses
Failure due to fatigue stresses
Failure due to tensile stresses
After discharge of a cargo of bananas there are a lot of cartons of condemned fruit on the deck. The vessel is not in a special area and is more than 100 miles from land. Select from the given options the best way to dispose of the condemned fruit.
Remove and retain all of the packaging including any inner plastic bags and dispose of the condemned fruit overboard.
Keep the cargo onboard until the vessel enters a port with suitable disposal facilities.
Dispose of the complete cartons of condemned fruit overboard and make an entry into the Garbage Disposal Log.
Keep the fruit for crew consumption and dispose of the packaging.
On modern chemical tankers, nitrogen is often used to achieve a super-dry atmosphere within a cargo tank prior to loading. Sometimes however, equipment delivering a special air supply is fitted and available for this same purpose. What does this equipment do?
It injects nitrogen into the air.
It supplies super-cooled air.
It filters carbon-dioxide out of the air.
It supplies de-humidified air.
After main power is restored, a timed sequential restart of motor-driven auxiliaries is necessary to avoid:
Overvoltage due to current surges
Generator overload due to many motors starting at simultaneously
Overloading creating earth faults
Over-frequency due to overspeed of generator
Why should containers containing scrap metal be stowed under deck or in high on-deck stowage positions?
Because of separation requirements under the IMDG Code
To avoid contact with seawater
Because of shippers’ requirements
Because of segregation requirements under the IMDG Code
A delta connected 3-phase A.C. induction motor is running normally at its rated current of 150 A when a single phasing fault (open circuit) occurs in one line. The likely outcome will be:
Line currents: 0 A, 180 A, 180 A. Trip condition: trip on overload.
Line currents: 150 A,150 A,150 A. Trip condition: fuses blow on short circuit.
Line currents: 75 A, 75 A, 75 A. Trip condition: no trip but speed falls.
Line currents: 0 A, 150 A, 300 A. Trip condition: trip on overload.
What would be considered as an acceptable range for the p-alkalinity in a low pressure auxiliary boiler?
0- 100 ppm CaCO3.
300 - 600 ppm CaCO3.
600 - 1000 ppm CaCO3.
100 - 300 ppm CaCO3.
Passenger ships shall either carry automatically self-righting liferafts or canopied reversible liferafts. What does it mean that a liferaft is automatically self-righting?
The liferaft will automatically turn back into an upright position when it is fully loaded with people
One person can manage to turn the liferaft back into an upright position
It means the same as self-righting lifeboats
The liferaft will automatically turn back into an upright position when it is empty of people
Ce test en ligne se compose de 90 questions aléatoires issues des tests CES 5.1 sur un sujet de votre choix.