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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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Le test consiste en des questions aléatoires sur un sujet sélectionné.
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What is the MARPOL definition of a "solidifying substance"?
A noxious liquid substance which, in the case of a substance with a melting point of less than 20°C which is at a temperature of less than 10°C above its melting point at the time of unloading, or in the case of a substance with a melting point equal to or greater than 20°C, is at a temperature of less than 15°C above its melting point at the time of unloading.
A noxious liquid which will crystallise and eventually bond into solid form at ambient, or less than ambient temperatures unless an external heat source is applied.
A noxious liquid substance which, in the case of a substance with a melting point of less than 15°C which is at a temperature of less than 5°C above its melting point at the time of unloading, or in the case of a substance with a melting point equal to or greater than 15°C which is at a temperature of less than 10°C above its melting point at the time of unloading.
A noxious liquid substance which will cystallise and eventually bond into solid form if exposed to an external heat source.
You are Sen.Off.Deck on vessel "A" and your cargo is iron ore. The vessel is in narrow waters and you have been in a collision with vessel "B" causing your vessel to take in water. How will you act to save the vessel and the cargo?
Call main office for help
Navigate the vessel on ground as soon as possible
Call tug boats for help
Try to discharge the incoming water
Which of the following duties shall be included in the "muster list" as being assigned to crewmembers in relation to passengers ?
ensuring that extra food and water is taken to the survival craft
clearing the escape routes
assembling passengers at muster station
ensuring that every passenger is provided with an immersion suit or a thermal protective aid
If a seaman has to walk across a stow of cartons containing perishable foodstuffs what should he do to minimise the risk of damage to the contents? Select the most appropriate option from those given.
He should step on the middle of the cartons.
All parts of the carton are of equal strength and therefore it doesn't matter which part he steps on.
He should step on the edges of the cartons.
He should step on the corners of the cartons.
What is the correct initial firing procedure to be adopted when bringing a main steam boiler up to pressure from cold condition?
Start the firing on maximum rate and raise the pressure in as short a period as possible, to save energy.
Start the firing on minimum rate and alternate with maximum rate continuously firing until the boiler is up to pressure.
Start the firing on minimum rate and continuously fire until boiler is up to pressure.
Start with intermittent firing, using small firing periods and long intervals gradually building up to longer firing periods and shorter intervals until steam pressure starts to rise.
What is the main responsibility of a bridge lookout at night?
Inform the bridge of any new lights when they appear over the horizon or any other items observed which may affect the ship
Inform bridge of changing weather patterns
Inform bridge of any lights when they appear over the horizon
Inform bridge of any other ships observed, which appear to be getting closer to your own ship
On a Container vessel, where should a mid-bay guide be positioned?
On the tank top at the ends of 40' container bays
On the tank top mid-way in 40' guides to prevent transverse movement of 20' containers.
At the base of cell guides
Between 20' container bays on deck
What are we seeing here?
A sailing vessel, at anchor.
A sailing vessel of less than 10 metres in length, displaying the mandatory combined lantern inlieu of sailing lights, seen head-on.
A sailing vessel less than 20 metres in length, displaying the optional combined lantern in lieu of standard sailing lights, seen head-on.
A sailing vessel, seen from astern, where the edges of her sidelights are both visible.
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
Many LPG carriers are designed to carry the cargo in a fully refrigerated condition. What is the normal maximum cargo tank pressure on a fully refrigerated LPG carrier?
10 bar gauge pressure.
18 bar gauge pressure.
0.7 bar gauge pressure.
7 bar gauge pressure.
Choose the option which is most likely to result in erosion of the tubes in a heat exchanger.
Cooling water velocity too high.
Cooling water temperature too high.
Cooling water pressure too high.
Rate of heat transfer too high.
A chlorine carrier must be equipped with a chlorine absorption plant connected to the cargo tanks and cargo lines. What is the gas detectors alarm setting?
10 ppm.
20 ppm.
5 ppm.
15 ppm.
On the figure 4 possible definitions of the term "QUAY" are given. Which one is the correct one?
Quay is given by C on the figure
Quay is given by A on the figure
Quay is given by D on the figure
Quay is given by B on the figure
What should not be done when a container of liquid ammonia is on fire?
Restrict ventilation
Cool the container with water
Use a dry chemical fire extinguisher or carbon dioxide gas
Use self-contained breathing apparatus
A pump cover is sealed using a paper gasket which is damaged during overhaul. There are no spare gaskets available. How should the casing be sealed when reassembling the pump?
Re-use the old gasket.
Run a bead of silicon around the outside of the joint after fitting the cover.
Put a thick layer of jointing compound on the face of the cover and tighten the cover until the compound squeezes out.
Make a new gasket from old chart paper or other similar material of the same thickness as the original gasket.
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
Why do rolled joints of meat carry a higher risk of bacterial infection?
Because rolled joints are normally purchased already prepared and the quality control of a shore supplier can not be guaranteed.
Because meat of a poorer quality is generally used in rolled joints.
Because any bacteria that were present on the outside surface of the meat will be transferred to the inside when the joint is rolled.
Because the temperature necessary to kill bacteria can never be reached in the middle of a rolled joint.
Why should only dry powder known to be “foam compatible” be used in conjunction with foam to extinguish gas fires?
Because certain types of dry powder has a negligible cooling effect
Because certain types of dry powder can cause breakdown of a foam blanket
Because certain types of dry powder is a flame inhibitor
Because certain types of dry powder not give protection against re-ignition
Telephones are being used to communicate between personnel onboard and ashore during a bunkering operation. What instruction would you give to ship personnel regarding action to take in the event of failure of the telephone communication during the operation?
Use a crewmember as a messenger between personnel involved in the operation.
Slow down the bunkering rate until alternative reliable communications are established.
Stop the bunkering until alternative reliable communications are established
Call the electrician, and get him to repair the telephone while the bunkering operation continues.
What should you do if you are in the engine room and the alarm for "CO2 release into the engine room" sounds?
Leave the engine room immediately.
Start the fire pump.
Wait to make sure that the CO2-system is discharging into the engine room before leaving.
Immediately go for the nearest fire extinguisher.
What is the correct procedure when transferring (internal trimming) of oil cargo is necessary?
Obtain permission from charters and note procedures in oil record book and deck log
Ensure the vessel is even keel on arrival port
Only 5% cargo permitted to transfer.
Ensure safe ballast condition
When a large motor load suddenly is disconnected from the switchboard and the generator is AVR controlled, what will the ouutput voltage do ?
Remain approximately constant, due to governor action.
Initially rise, then reset to the set value.
Remain approximately constant, due to AVR action.
Initially fall, then reset to the set value.
What is the IMSBC Code?
A Code of Practice for Security of the vessel
The Bulk Carrier Code
Code of practice for dangerous packaged goods
The International Maritime Solid Bulk Cargo Code published by IMO which must be carried by all bulk carriers
Which herb, native to the Mediterranean region, has green spiky leaves and is often used in the preparation of lamb dishes?
Thyme
Parsley
Rosemary
Sage
What do you understand by: Hydrographic vessel in position…….wide berth requested?
This means: the hydrographic vessel is providing a wide berth
This means: the hydrographic vessel wishes to go alongside a wide berth
This means: the hydrographic vessel is very wide
This means: keep well clear of the hydrographic vessel in position………
You are to load a cargo ofIsocyanate to tank 4 centre port and the cargo hose from shore is to be connected to a flange directly adjacent to the cargo pump, so that the manifold cross-over and deck cargo line are not used. What must you place underneath the connection?
A portable drip-tray.
A label stating "portable connection".
A red flag.
Some sawdust or other absorbant material.
What has the cadet been ordered to do?
The Cadet has been ordered to to dismantle the evaporator
The Cadet has been ordered to test the steering gear
The Cadet has been ordered to help the Bo's'un sandblast the poop deck
The Cadet has been ordered to paint the evaporator using a paint brush
What is the correct name of the part highlighted in the sketch?
The correct name of the part highlighted in the sketch is: Push rod
The correct name of the part highlighted in the sketch is: Camshaft
The correct name of the part highlighted in the sketch is: Crankshaft
The correct name of the part highlighted in the sketch is: Crankcase relief valve
What is the requirement to number of portable gas detection apparatus?
At least two sets.
One set.
Sufficient number of apparatus.
There is no requirement to numbers of apparatus.
Which of the following is a summary of the tank cleaning requirements for a category "X" substance on a chemical tanker constructed after 1st January 2007?
Strip to 75 litres / 12 miles from land / 25 metres of water / minimum 7 knots, proceeding en route.
Prewash for solidifying or high viscosity substances / strip to 75 litres / 12 miles from land / 25 metres of water / minimum 7 knots, proceeding en route.
Prewash / strip to 75 litres / 12 miles from land / 25 metres of water / minimum 7 knots, proceeding en route.
Prewash / strip to 100 litres / 12 miles from land / 25 metres of water / minimum 7 knots, proceeding en route.
Which characteristic of chlorine makes it different to most of the other liquefied gas cargoes carried at sea?
Chlorine is lighter than air so the vapours will rise.
Chlorine is non-toxic.
Chlorine cannot be transported under pressure.
Chlorine is non-flammable.
Recording the pulp temperature of fruit at all stages of the transport chain provides a valuable record of the status of the product. Which of the procedures given in the options should be adopted by a deck officer when dealing with the fruit?
After taking the pulp temperature the individual piece of fruit should be retained in the space with other specimens that have been used
After taking the pulp temperature the individual piece of fruit should be discarded as the specimen used will usually spoil rapidly.
It does not matter whether or not the specimen is left in the cargo space as the carriage temperature will preserve it.
After taking the pulp temperature the individual piece of fruit should be returned to the carton of fruit from which it was sampled
Polymerisation may be a problem with some liquefied gas cargoes such as vinyl chloride and ethylene oxide. What is the definition of polymerisation?
Polymerisation is when liquids cool down and become more viscous.
Polymerisation is when single molecules of the same compound join together to form a new compound usually with a higher viscosity.
Polymerisation is when the molecules of a compound split and form a new compound.
Polymerisation is when molecules of two or more different compounds join together to form a new compound.
What is the output shown on the "Rate of Turn" display fitted on the bridge?
The Rate of Turn indicator shows the rudder angle applied by the helmsman to turn the ship.
The Rate of Turn display shows the turning speed the vessel is swinging in degrees per second
The Rate of Turn indicator shows the changing angle of the vessel from the meridian
The Rate of Turn indicator displays the rate the ship is swinging in degrees per minute
When are power-operated watertight sliding doors (class 3 doors) compulsory for all watertight doors aboard passenger ships?
Where the ship is fitted with through-going car decks
Where one or more doors are situated below deepest load line
When the ship is certified for more than 150 passengers
Where the ship has passenger spaces below the bulkhead deck
When small amounts of cleaning additives (detergent products) are added to water in order to facilitate the washing of tanks which previously contained liquid chemicals, what conditions apply?
No conditions apply provided not more than 200 litres per 1000 cubic metres of tank volume is used in any one washing operation.
The discharge shall be governed by the provisions of Annex I or II, which would apply to the additive had it been carried as cargo. Tank washing procedures involving the use of such additives shall be set out in the Procedures and Arrangements Manual and approved by the vessel's Flag State Administration.
If the additive contains Pollution category "X" products and more than 200 litres is used in the washing operation for a single cargo tank, then a prewash to shore must be carried out.
No additives containing Pollution Category "X" components shall be used, except those components that are readily biodegradable and present in a total concentration of of less than 10% of the cleaning additive. No restrictions additional to those applicable to the tank due to the previous cargo shall apply.
What is the meaning of "stand by"?
That you shall stand very close to the engineer officer.
That you shall keep on with your work.
That the watch keeping personnel shall be ready for starting or manoeuvring the main engine.
That you are properly relieved from your duties.
Which factor influences the pumping capacity (flow) of a centrifugal pump the most?
Total pressure head
Liquid density
Suction pressure
Liquid temperature
Where do you load dangerous goods?
Dangerous goods shall only be loaded in designated ares on the ro-ro deck
The driver of a tank lorry can decide where to park the vehicle
The officer in charge of loading can decide where to load dangerous goods if the number of vehicles and passengers are limited
As long as the ship is certified to carry dangerous goods there are no restrictions
What is the master's position if he is asked to load a container that is incorrectly manifested, but which is believed to contain dangerous goods, about which insufficient information is supplied?
If it it approved by the operations department, he can assume all safety checks have been carried out and should load it.
He has the authority to refuse it.
He must load it, but ensure it is placed in a safe loaction, to which there is immediate access in the event of an emergency.
He must load it, but immediately advise his operations department and request full information.
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
Where are cargo residues usually concealed?
In the bilges
In the upper sections of the ship’s frames
In bulkhead corrugations
In recesses below manhole covers
Which of the 4 alternatives shows the symbol for a PNP transistor?
Figure 4.
Figure 3.
Figure 2.
Figure 1.
If conditions permit, which is the best way to board a liferaft which is floating close to the ship?
Wearing a lifejacket, jump into the water close to the raft and then swim to it
Jump onto the raft itself
Jump into the water close to the raft, without a lifejacket, as this will make it easier to swim and board the liferaft
Use a rope ladder close to the raft to climb down and board
Which of the following is the minimum acceptable value of insulation resistance for High Voltage equipment?
100 k Ohms
1M Ohms
1G Ohms
100 M Ohms
Too high exhaust temperature in one cylinder becomes because of:
Nozzle ring of turbocharger fouled or partially choked.
Scavenge ports dirty.
Compression pressure too low.
Speed governor defective.
When you are calibrating an instrument what is the most common first step in the procedure (consult the manual)
Adjustment of Zero-point and span
Adjustment of span
Adjustment of range
Adjustment of linearity
What is the name of the simplest hydrocarbon composed of one carbon atom and four hydrogen atoms?
Methane.
Propane.
Ethane.
Pentane.
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
A motor is protected by a thermal overcurrent relay. After tripping on overload it will not be possible to reset the overcurrent relay immediately because the:
Oil dash-pot has to be reset.
Bimetallic strips need time to cool down
Starter isolator automatically applies an interlock.
Line contactor spring has to be reset
Which preparations and precautions are necessary before "hot work" commences onboard ship?
Just inform the Chief Engineer that the work is going to be carried out
Sound the general alarm before commencing work.
Notify all persons onboard at least 24 hours in advance of the work commencing.
Follow all ISM procedures relating to hot work including permit to work and hotwork permit requirements.
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.
Cross flooding arrangement
Separate trim tanks
Ballast trimming system
Self acting ballast trimming arrangement
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
What do you understand by: Bitter end?
Bitter end means: a foul taste at the end of a meal
Bitter end means: to the very last moment
Bitter end means: the toggled end of a lifeboat painter
Bitter end means: the end link of an anchor cable that is secured within the chain locker
Where should a sample for boiler water test purposes be taken from?
From the boiler feed system.
From the boiler steam space.
From the boiler water space.
From the blowdown line.
What are the dangers associated with operating a heavy lift derrick close to the horizontal on a General Cargo vessel?
Because the cargo operations at other hatches may have to be suspended
Because the stability of the vessel may become critical
Because there is danger of excessive stresses acting on parts of the derrick system
Because the driver will have a restricted view of the lifting operation
Which statement about the garbage record book is true?
Each entry is to be written in the language of the ship's flag state
It is required by all ships on International voyage
Each entry is to be signed by the Master
It is used to record all operational and accidental garbage discharges
A situation exists where a cargo of palletised fruit is being loaded to capacity on a conventional reefer vessel. In order to load all of the available cargo it is proposed to break down some of the pallets and place the loose cartons on top of the pallets; there is just enough space to accommodate this below the deckhead. From the options given which is the most suitable action to take?
Reject the plan as the extra handling will incur greater stevedoring costs.
Reject the plan as the charter is to carry only palletised cargo.
Reject the plan as the reduced gap at the top of the stow will restrict the return air flow.
Accept the plan in order to carry all of the cargo.
What is "DRAUGHT", in the figure?
Draught is D, in the figure
Draught is A, in the figure
Draught is C, in the figure
Draught is B, in the figure
xxz
a
c
b
d
Before entering the cargo tank of an LNG carrier it will be necessary to inert and then aerate and gas free the tank. What is the atmospheric content of oxygen that is required before tank entry is allowed?
21%.
17%.
19%.
20%.
Prior to removing the access doors to a pressure vessel for internal maintenance it should be ensured that all pressure has been relieved. As well as a zero indication on a pressure gauge which other measure, from the options given should be taken to confirm this prior to commencing the work?
Open the drain valve when the gauge reads zero to check that there is no outflow.
Open the drain valve and when the outflow stops slacken off the drain valve flange bolts and 'crack' open the flange in case the drain is blocked.
Open the drain valve while pressure still shows on the gauge and to check it is clear. Outflow should cease as the pressure gauge reaches zero.
Back of the tensioning device for the relief valve to vent the pressure to atmosphere.
You have prepared a tray of cream eclairs, using fresh cream filling. At what temperature must they be stored until required for service?
Between 5 and 7 degrees Celsius.
At least 10 degrees Celsius.
0degrees Celsius.
-5 degrees Celsius.
What arrangement may be installed in passenger ships to reduce unsymmetrical flooding in damaged condition?
Ballast trimming system
Cross flooding arrangement
Separate trim tanks
Self acting ballast trimming arrangement
How often shall drills for the operation of watertight doors, side scuttles, valves and closing mechanism of scuppers, ash-chutes and rubbish chutes take place in passenger ships?
Every month
Weekly
Every two weeks
Daily
What must be checked before deck cargo is loaded on top of hatch covers on a General Cargo vessel?
The ship must be on an even keel
The ventilators should be opened
The hatch covers must be fully secured to a sea going condition
The deck cranes must always be stowed into sea going position
A water heating system with automatic temperature control uses steam as the heating medium and the temperature is controlled by a pneumatically operated valve? What would be an acceptable start up procedure of the system from cold state?
Start with the control valve in manual and use the hand jack to gradually increase the temperature by throttling the steam flow before changing to pneumatic control.
Start the system up in manual mode and gradually increase the controller output signal until the temperature reaches the required value before changing over to automatic control.
Start the system up in automatic mode with normal set point but with the steam supply to the control valve manually throttled in.
Start the system up in automatic mode with normal set point so that the required temperature is achieved as quickly as possible.
A pallet of chilled cargo is made up by placing cartons on top of each other in tiers. Banding straps are then placed tightly around the cartons in way of robust, vertical cardboard corner pieces. Which of the given options is the main purpose of having these corner pieces?
The colour of the corner pieces indicates the carriage temperature of the cargo on the pallet.
The corner pieces reduce chafing against adjacent pallets.
The corner pieces add rigidity and strength to the stow of cartons on the pallet.
The length of the corner pieces acts as a guide for the height of the pallet.
Due to the safety of the ship its crew and passengers it is only permitted to ……… in designated areas onboard
ead magazines and newspapers
Use mobile telephones
Drink
Smoke
What is this?
The identification stamp placed in the passport of a stowaway by an Immigration Officer to indicate that his or her nationality is "unknown".
The "Unitary Nomenclature" symbol placed alongside the name of a dangerous cargo in shipping documents to indicate that it appears on the list of approved international shipping names.
The United Nations stamp used for endorsing international shipping certificates.
The United Nations Packaging symbol used for Dangerous Goods.
What prevents hatch cover panels from lifting in a seaway on a General Cargo vessel?
The hatch compression bars
The hatch cover hydraulic system
The hatch cover cleats and cross-wedges
The hatch cleats
What is the normal name of the special wire/rope on board the ship used to make a tug fast?
Mooring wire
Tugs rope
Towing spring
Tugs wire
Why should heavy-duty footwear, with non-slip soles and re-inforced toecaps, that fully cover the foot, be worn when working in the galley and storerooms?
To avoid the possibility of injury if a sharp or heavy object is dropped, or a hot liquid is spilled, or the floor becomes slippery.
Because footwaer of this type will support the wearer better and avoid aches and pains developing in the feet and lower legs.
Because you never know when you may have to go out on deck.
Because footwear of this type eliminates the possibility of fungal foot infections through exposure to moist and humid conditions as may be experienced when working around a galley range for prolonged periods.
A seawater pipe is holed due to corrosion causing frequent bilge alarms. Which of the given temporary repair methods would be the preferred option to remedy the problem until the pipe can be replaced?
Cover all of the affected area with fibre glass tape and resin/fibre glass mixture.
Drive a steel taper pin into the hole to seal it.
Cover the hole with rubber insertion held in place with a jubilee clip.
Wrap duct tape around the pipe in way of the hole.
Very roughly, the gas mixture from Crude Oil can be represented by the hydrocarbon gas Propane. What is the approximate upper flammable limit(UFL) of crude oil vapours by volume in air?
8 to 9%
12 to 15%
10 to 11%
5 to 6%
What is the definition of sludge control?
The cargo tanks are to be washed that often so recidues do not accumulate in large quantities.
The sludge is controlled by use of special instruments.
This is done in port by a special sludge control squad.
Visual control of the sludge.
What is the name given to the mixture in which meat or fish can be laid for a few hours to add flavour right through the dish?
Macedoine.
Mignonade.
Marmalade.
Marinade.
According to the IAMSAR Manual, what is the expected survival time for a person in water of 4-10 degrees Celsius, without special protective clothing?
Less than 12 hours.
Less than 3 hours.
Less than 1 hour.
Less than 6 hours.
Due to the relative low resistance of a Pt 100 sensor we might have to compensate for the cable-resistance to ensure a correct reading. Which of the 4 alternatives given is correct for the connection of this compensation resistance.
Figure 4.
Figure 1.
Figure 2.
Figure 3.
What is common between a clover leaf and crinkle bar?
They are items of portable lashing equipment
They are parts of a loading ramp
They are tools used for tightening ro-ro lashings
They are items of fixed lashing equipment
You are alongside, port side to, about to commence loading several grades of chemicals. The Duty Officer instructs you over the walkie-talkie to proceed to the port manifold and open the valve to 4 port line. When you get there, there is no hose connected to that line. What will you do?
Open the valve to 4 port line as instructed.
Report the situation back to the Duty Officer. Request clarification and confirmation of the instruction.
Take a look at the starboard manifold. There is a hose loop between 4 port and 4 starboard lines. Assume the Duty officer must have meant this side and open 4 port line on this manifold.
Although there is no hose connected to 4 port line, there is one connected to 3 port line. Assume the Duty Officer must have meant this line and open this valve instead.
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.
How should dunnage be laid, prior to loading a Caterpillar Tractor?
Only at the extreme ends of the tractor’s wheels
Athwartship under the tractor’s wheels
Athwartship at the ends of the tractor’s wheels
Fore and aft under the tractor’s wheels
As part of a survey of a main steam boiler it is necessary to check the condition of the steam drum. What would be the preferred method for checking drum shell thickness in such a situation?
Drill a test hole in the shell to accurately measure the thickness.
Use magnetic particle inspection equipment.
Use dye penetrant tester.
Use ultrasound equipment.
What alternative is there to direct (heating coils or heat exchanger) or ducted heating on a parcel chemical tanker?
Recirculation.
There is no alternative. These are the only acceptable methods of heating for such a vessel.
Venting the tank with heated, de-humidified air prior to loading.
Stowage such that heat transfer may be delivered from a cargo of higher temperature in an adjacent tank.
What is the main reason for sometimes having a separate forced lubrication system for the camshaft on large cross head engines?
To prevent the camshaft system being contaminated with any water leaking into the main lubrication system from faulty cylinder liner seals.
Because the camshaft lubrication system has a lower pressure than the main lubrication system.
To prevent any fuel leakage from the high pressure fuel pumps contaminating the oil in the main lubrication system.
Because the camshaft system uses a different grade oil from that used in the main lubrication system.
The space between the cargo tank liquid dome and dome cover for an LNG carrier is maintained inerted, usually using nitrogen. What is the maximum allowable O2 content of the nitrogen used for this purpose?
1% O2.
3% O2.
4% O2.
5% O2.
When it is midsummer in northern Europe, what time of the year is it in South Africa?
Midsummer
Autumn
Midwinter
Early spring
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
Ce test en ligne se compose de 90 questions aléatoires issues des tests CES 5.1 sur un sujet de votre choix.