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Online-Test: Test online CES 5.1 for Engine department, Support level
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What is meant in mariphone traffic with a coast-station by a ”personal call”:
a telephone conversation, stating name and address for account of the shore subscriber
a telephone conversation with a person whose name is known, department or extension on the telephone number given
a phone-call, stating name and address, with a person who has no telephone himself
Don't know
A ship is equipped with a right-handed fixed pitch propeller, which when going from Full Ahead to Full Astern will make the ship sheer to starboard. Can anything be done to reduce this change in heading?
The rudder should be kept amidships when going astern and there is little that can be done to reduce the swing to starboard
The rudder can be put from side to side in a "Rudder Cycling" movement.
The rudder can be put to Hard to Port to reduce the water flow to the right side of the propeller
The rudder should be put Hard to Port to reduce the water flow to the left side of the propeller
Please name correctly the most common rudders as shown below? UNBALANCED, BALANCED, SEMI-BALANCED, UNDERHUNG BALANCED
NO. 3,2,1 and 4
NO. 1,3,2 and 4
NO. 2,3,1 and 4
NO. 1,2,3 and 4
Which of the following has not to be noted in the radio log-book
Duration of public correspondence communications
Name of person responsible for distress communications
Discontinuance and resumption of watchkeeping on entering and leaving port
Summary of distress, urgency and safety communications
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
You are the Sen.Off.Deck of a vessel involved in a collision. All necessary actions to ensure safety of crew and vessel has been taken. What shall you then tell the Sen.Off.Deck on the other vessel?
Don-t talk to the Sen.Off.Deck on the other vessel at all.
Name and Port of registry of your vessel.
That you are sorry for the collision.
Check with the pilot, or any witnesses, about their consideration of whom to blame for the collision.
A triac is used to provide temperature control of an oven. The galley complain that the oven only reaches approximately 50% of demanded temperature. Which of the following is a likely cause?
The voltage supply to the oven controller is reduced by about 50%
Connection between the demand knob and the triac gate terminal has gone open circuit.
One of the main switching elements in the triac has failed.
The triac has completely failed.
In a large, 2 stroke, main diesel engine cylinder lubricating oil is supplied directly through lubrication points cut into the cylinder liner. At what point during the cycle should the supply normally occur.
At mid-stroke of the piston.
As the piston rings pass the lubrication points.
At Bottom Dead Centre.
At Top Dead Centre.
How many sub-classes are there for IMDG Class 4 (Flammable solids) cargoes?
2
4
5
3
To control bleeding, a tourniquet should be applied:
Only when all other means have failed
Whenever it is possible to stop bleeding
Only on Radio medical advice
Whenever you have to transport the casualty
Where is the acceptable location to smoke while on duty, or working in a cargo deck stowed with containers?
The designated smoking area inside the accommodation or on deck?
Smoke close to an entrance to the cargo deck?
Carefully smoke outside the container stowage area?
There is no smoking allowed while on duty?
What could result from carrying coal with a high sulphur content on a Bulk Carrier?
Evolution of methane gases
Spontaneous combustion
A possible shift of cargo
Corrosion of steelwork in the cargo holds if the cargo becomes wet
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 English name is given to all the plates, cups, saucers, serving dishes, etc?
Cuttlery.
Servery.
Crockery.
Stockery.
Why is nitrogen used for the inerting of hold spaces and interbarrier spaces on LNG carriers?
Because of the high oxygen content of combustion generated inert gas.
Because the carbon dioxide in combustion generated inert gas would freeze when in close proximity to the cargo.
Because of the high humidity in combustion generated inert gas.
Because of the high temperature of combustion generated inert gas.
There has been an accident at the manifold and one of the crew has swallowed a quantity of unidentified chemical. What is the correct medical term for this?
Inhalation.
Infusion.
Absorption.
Ingestion.
What would you suspect has happened if the lubricating oil for an air compressor has a milky white appearance?
Water contamination of the oil.
Wrong grade of oil has been used.
Oil temperature has been too high.
Air contamination of the oil.
On a General Cargo ship, what must completed before a cargo hoist wire is replaced on a deck crane ?
Permit received from Port Authorities
A full risk assessment carried out and a permit to work issued
Check list completed and work plan agreed
Risk assessments would not be required for this type of work
On a Container vessel, what are the limitations of Cargo Securing Manuals?
They are not always approved by a classification society
They are drafted whilst the ship is still under construction and need to be checked against the ship's 'as completed' condition in order to be fully reliable.
Some Cargo Securing Manuals cover a full range of sister ships
Cargo securing arrangements in the manuals may be unsuitable for heavy weather conditions
The purpose of the surface blow valve is to
Remove any oil or scum on water surface
Remove air from feed-water
All alternatives
Remove sludge and scale from boiler tubes
According to SOLAS Regulation all dedicated seawater ballast tanks on oil tankers shall have an efficient corrosion prevention system such as hard protective coatings or equivalent. With regard to coatings do SOLAS set any requirement to colour?
Preferably dark colour.
No requirement.
Preferably light colour.
Preferably light red colour.
What name is given to the rotating jet water outlets on a tank-cleaning machine that is used on an oil tanker?
Distributors.
Nozzles.
Turbines.
Ejectors.
Some gas carriers are designed to carry both LPG and LEG. What is the design temperature on the cargo containment system on a LPG/LEG carrier?
Design temperature of the cargo containment system for an LPG/LEG carrier is minus 103 degrees C
Design temperature of the cargo containment system for an LPG/LEG carrier is minus 48 degrees C
Design temperature of the cargo containment system for an LPG/LEG carrier is minus 89 degrees C
Design temperature of the cargo containment system for an LPG/LEG carrier is minus 162 degrees C.
Which of the following hazard risks generally apply to the carriage and handling of LNG and its vapours?
Flammable, Toxic and Frostbite
Flammable, Toxic and Corrosive.
Flammable, Corrosive and Frostbite.
Flammable, Asphyxia and Frostbite
Why are hypochlorite based treatments used on some sea water cooling systems?
To prevent biological growth in the system.
To reduce sediment build up in the system.
To prevent corrosion of the system
To increase the heat transfer capacity of the system.
Which types of compressors are used as cargo compressors onboard gas carriers?
One, two and three stage piston compressors.
One, two and three stage screw compressors.
Oil free screw and piston compressors.
Piston, screw and centrifugal type compressors.
The decision to abort a proposed or ongoing ship to ship mooring or cargo transfer operation rests solely with:
The Sen.Off.Deck of the constant direction or anchored vessel which is to discharge the cargo.
The Pilot, if one is present on either ship.
Either of the Sen.Off.Deck if he feels the situation is heading out of control due to bad weather, bad manoeuvring, or for any other reason.
The Sen.Off.Deck of the manoeuvring or offtake vessel.
The lights here show those that must be exhibited by a vessel engaged in towing, as per rule 24 of the International Collision Regulations. But how long is the tow behind this vessel?
It is more than 50 metres but less than 200 metres.
It is less than 200 metres.
At least 100 metres.
It exceeds 200 metres.
You are in charge of a night bunkering operation. The delivery rate from the supplier is high and you are filling six tanks simultaneously. You loose track of the progress of the operation and feel that you are loosing control of the situation. What action should you take?
Stop bunkering, and establish facts, before bunkering is resumed
Request a reduction in the delivery rate to try and gain some time.
Prepare yourself and the crew for an overflow.
Open more tanks to slow down the filling rate of individual tanks.
What name is given to the flat, flexible, round-tipped knife, used to remove baked food from trays and for spreading fillings?
Pancake knife.
Palming knife.
Palette knife.
Paring knife.
Which is the "FORWARD SPRING", in the figure?
The Forward Spring is indicated by C, in the figure
The Forward Spring is indicated by D, in the figure
The Forward Spring is indicated by A, in the figure
The Forward Spring is indicated by B, in the figure
What is the main quencher for an oil tanker?
Powder.
Foam.
Water.
Carbonic acid.
During the anchoring procedure, what would the Chief Officer understand by the following request from the bridge, "Which way is it leading"?
The Master is requesting the Chief Officer to inform the bridge of whether he can determine which way the ship is moving in the water.
The Master is asking the Chief Officer whether the ship needs to be moved forward and take the weight off the anchor cable.
The bridge would like to know the direction of the anchor cable from the hawse pipe.
The Master is asking the Chief Officer whether the vessel is dragging anchor
What is the minimum number of ”Firemen’s outfit” on gas tanker, above 5,000 m3, carrying flammable products?
2 sets of Firemen’s outfits
4 sets of Firemen’s outfits
3 sets of Firemen’s outfits
5 sets of Firemen’s outfits
What are the requirements for the number of portable gas measurement instrument(s) on tankers?
At least one instrument for measuring %LEL and one instrument for measuring volume %
Sufficient number of instruments.
At least 2 portable instruments for measuring flammable vapours.
At least 1 portable instrument for measuring flammable vapours.
What collective culinary term is given to the internal organs of a butchered animal, such as the heart, kidneys, liver, tripe, etc?
Glands.
Offal.
Intestines.
Oval.
On a Container vessel, what will attending surveyors inspect when containers have been lost overboard?
The vessel's Safety Construction certificate
The on-board cargo lashing inventory
Certificates of approval related to lashing equipment used to secure those containers
The vessel's Class certificate
A rating on boiler watch notices water coming from the safety valve chest drain while the boiler is in operation. What action should be taken by the rating?
Contact the engineer officer of the watch and inform him immediately.
Put a bucket under the drain to prevent the deck becoming wet and slippery.
Hit the safety valve with a hammer to try and get it to reseat tightly.
Operate the safety valve using the release gear to try and get it to reseat tightly.
According to ISGOTT, when in-service testing a hose used for cargo transfer on an oil tanker (and for which the elongation of the hose assembly when new was greater than 2.5%), what is the maximum permitted elongation before the hose must be withdrawn from service?
Not more than 1.5 times the temporary elongation measured when the hose assembly was new, as documented in the manufacturer's certificate.
Not more than 1.25 times the temporary elongation measured when the hose assembly was last tested, as documented in the appropriate certificate.
Not less than 1.5 times the temporary elongation measured when the hose assembly was new, as documented in the manufacurer's certificate.
Not more than 1.5 times the temporary elongation measured at the previous in-service test, as documented in the ship's annual test record.
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.?
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.
Locate them in large cabins to ease their stay.
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.
The operation of a diesel engine is controlled by a mechanical-hydraulic, compensated speed sensing governor. How will the governor control be affected if the compensation needle valve is closed in and the engine load changes?
The governor will hunt resulting in erratic engine speed control.
Engine speed control will be sluggish.
A change in load will not affect a speed sensing governor.
Altering the compensation needle valve has no effect on speed control.
What is the purpose of fixed stacking cones?
To prevent the horizontal movement of 20’containers at tank top level
To prevent the horizontal movement of 40’containers at tank top level
To lock 20’containers in 40’ cell guides
To prevent movement of 20’and 40’ containers at deck level
What name is given to the "energy" that a person "burns" during the day and which is replaced in the amount and type of food he eats?
Cellulose.
Callibres.
Canapes.
Calories.
Which of the following substance is ozone-depleting?
Ammonia
CO2
Halons
Neon
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.
Where should a container containing Calcium Hypochlorite be stowed?
Away from sources of heat
Away from cargo transport units containing class 6 IMDG cargoes
Under deck
Away from the centreline of the ship
You are in charge of discharging and crude oil washing a crude oil carrier.What is the maximum allowed oxygen level measured one meter below deck in a tank during crude oil washing? (IMO Reg)
5%
10%
8%
3%
Which of the given options is the approximate value of the flammable range for Methane measured as a percentage volume in air?
5.3 - 14.0% by volume.
2.6 - 12.4% by volume.
3.5 - 13.0% by volume
1.4 - 10.8% by volume
What should be done with the data logger printouts after completing the discharge of a refrigerated cargo?
They should be retained onboard for a minimum of 2 years.
They should be handed over to the cargo receiver.
They should be retained onboard indefinitely.
They can be discarded once the discharge is completed.
To what Proof Load is a 30T SWL derrick tested?
38T
35T
40T
33T
How should chemicals and harmful substances be stored on board?
In a gas-tight locker close to the bridge
In the central store or in the engine room
In a separate locker. The locker shall be clearly marked, locked and ventilated.
In a locker preferably on boat deck. The locker shall be clearly marked.
The physical size of a resistor is an indicator of its
Power dissipation capability
Tolerance
Total resistance
Resistivity
Cross flooding arrangement
Separate trim tanks
Ballast trimming system
Self acting ballast trimming arrangement
Which of these procedures should crew follow when conducting a search?
Search the perimeter of the space up to a height of 5 feet.
Wait in the area they’ve finished searching until they’re contacted for a status update.
"Stand quietly in various spots around the space, listening for unusual sounds like the tick tock of a clock mechanism."
Conduct random or spot checks of logical threat areas.
How often shall watertight doors in main transverse bulkheads which is in use at sea be operated (tested)?
Every two weeks
Every month
Daily
Weekly
Where shall you be able to activate the ship security alert system on board ro-ro passenger ships?
Navigation bridge
From the navigation bridge and in at least one other location
Captain's office
Captain's- and Chief Officer's office
What is understood by the term "a Combination Carrier"?
A general cargo ship
A ship designed to carry either oil or solid bulk cargoes
A ship designed to carry bulk cargoes in alternate holds
A ship designed to carry all types of cargoes
Liquefied gas is, by IMO, divided into different groups. What is the criterion for this division?
The boiling point, chemical bindings, toxicity and flammability.
The gas pressure.
The hydrocarbon and nitrogen content.
The hydrate formation.
What must duty crew members ensure so that ro-ro units are not damaged on board?
Units must be driven at a safe speed
Units must not be driven in poor lighting conditions
Units must not be driven over ‘D’ rings
All on-board safety signs must be intact
Due to the safety of the ship its crew and passengers it is only permitted to ……… in designated areas onboard
Use mobile telephones
Smoke
Read magazines and newspapers
Drink
Compressors for handling vapour from liquefied gas cargoes are fitted as part of the cargo handling plant on liquefied gas carriers. How is liquid prevented from entering the compressor suction?
By checking the temperature in the vapour line between the cargo tank and compressor.
A liquid separator is fitted in the vapour line between the cargo tank and the compressor.
A liquid condenser is fitted in the vapour line between the cargo tank and the compressor.
By checking the pressure in the vapour line between the cargo tank and compressor.
A bulk cargo of steel coils is loaded and a number of the coils are noted by the Chief Officer to be rusted; what must the Master ensure?
Steel coils to be discharged
Clause the Bill of Lading with the reference numbers of the rusty coils and so make the Bill of Lading a "dirty" Bill.
No action needs to be taken.
Cargo temperatures measured on voyage
Medium and high speed diesel engines used for electrical generation duties on board ship have overspeed protection devices fitted to protect the engine in case the electrical generator trips while carrying high loads. Why are these devices necessary?
To stop the engine before any serious damage occurs due to excess inertial loads.
To stop the engine before any serious damage occurs to the electrical components due to excess voltage and frequency.
To stop the engine before any serious damage occurs due to rapidly changing thermal loads.
To stop the engine before any serious damage occurs due to rapidly changing cylinder pressures.
All passenger ships are divided into vertical ’zones’. What is the purpose of this?
This is firezones which can be divided from eachother with firedoors. If a fire start in one zone, all firedoors in front and aft of the fire will be closed from the bridge to stop the smoke and fire from spreading.
Vertical zones are separated with firedoors which will be closed automatically when the firealarm start.
There is one fireteam in each zone
All vertical zones are separated with waterthight doors, which will be closed in the case of a grounding, etc.
What is the meaning of the term purification?
Separation of solid contaminants from a liquid.
Cleaning a liquid.
Separation of two insoluble liquids with different densities, and at the same time removing of solids.
Operation as the 2.nd separator in a serial system.
What is the purpose of an evacuation analysis?
To provide port state control inspectors with reports
To provide the passengers with written results of the analysis
To identify and eliminate, as far as practicable, congestion which may develop during an abandonment
To ensure the ship can be evacuated in less than 30 minutes
How do we control the cargo tank pressure whilst we are at sea?
Whilst at sea we control the cargo tank pressure by use of inert gas system.
Whilst at sea we control the cargo tank pressure with the cargo cooling plant.
Whilst at sea we control the cargo tank pressure by use of cargo pumps and cargo heater.
Whilst at sea there is no way to control the cargo tank pressure.
Which of the following is associated with staphyloccocal food posining?
Uncooked fish that has been defrosted overnight in a refrigerator.
Food that is not kept properly hot (or cold) as required.
Raw salad leaves.
Unwaxed citrus fruit.
A conventional reefer vessel is loading a cargo of hard frozen palletised meat with a required carriage temperature of minus 18 degree Celsius. A thermistor at the centre of the pallets indicates the temperature to be approximately minus 10 degrees Celsius during loading. What action, from the options given, should be taken under these circumstances?
Continue loading onboard and deliver air at the lowest possible temperature to cool the cargo down to the correct carriage temperature.
Continue loading onboard at minus 10 degrees Celsius and then gradually reduce the air delivery temperature to minus 18 degree Celsius.
Return the cargo ashore for pre-cooling to minus 18 degrees Celsius.
Continue loading onboard and maintain the air delivery temperature at minus 18 degrees Celsius.
For a search to be effective it must be:
Centrally controlled.
Conducted by personnel with limited knowledge of the ship’s layout.
Inclusive of all personnel.
Organized haphazardly.
The most effective way to combat the threat of drug smuggling is to?
Organize crew into pairs and conduct weekly searches of the ship.
"Combining routine, but irregular searches of the ship with spontaneous targeted searches."
"Perform routine, but irregular searches using teams of two or more personnel from the same department."
Perform spontaneous targeted searches using teams of two or more personnel from the same department.
What is the SOLAS definition of deadweight?
Deadweight is the difference in tonnes between the displacement of a ship in water of specific gravity 1.025 and the load waterline corresponding to the assigned winter freeboard and the lightweight of the ship
Deadweight is the difference in tonnes between the displacement of a ship in water of specific gravity 1.000 and the load waterline corresponding to the assigned summer freeboard and the lightweight of the ship
Deadweight is the difference, in tonnes, between the displacement of a ship in water of specific gravity 1.025 and the load waterline corresponding to the assigned summer freeboard and the lightweight of the ship
Deadweight is the difference in tonnes between the displacement of a ship at its light and sea-going freeboards
When does a bulk carrier experience extreme tension in bottom structure during fast rate loading?
During ballasting in port
During loading of heavy cargo in midship hold
During correct loading pattern but with heavy cargo
During ballasting at sea
The pressure inlet to a pressure gauge is varied from zero to full scale and back to zero again. The output (indicating pressure) versus true pressure is shown in the diagr.The non - coincidence(mis - match) of loading and unloading curve is due to internal friction in the instrument. What do we call this phenomenon?
Dead band
Threshold
Hysteresis
Resolution
A compressed air supply system has two automatically controlled air compressors. When demand is high both compressors are needed to meet the delivery requirements. What is the best method for controlling the compressors to meet a varying, but intermittent demand?
Start and stop of the compressors controlled by timer switches.
Continuous running of both compressors and the use of unloading devices.
One compressor running continuously with the other on standby.
Sequential start initiated by pressure switches set at different switching pressures.
On a conventional reefer vessel is possible to ventilate the cargo spaces with fresh air using fans and trunkings. One of the reasons for using fresh air ventilation is to control the relative humidity within the cargo space. Select the option which best completes the following statement. "It is beneficial to be able to control the relative humidity within the cargo space because fruit cargoes should be kept…
…relatively moist to avoid the cargo dehydrating during the passage."
… relatively dry to avoid the formation of fungus in the vent trunkings during the passage."
…relatively dry to avoid deterioration of the packaging during the passage."
... as dry as possible to avoid build up of mould during the passage."
How would a ship drifting onto a rocky shore, be communicated?
"My ship is drifting into danger"
"My ship requires tug assistance"
"My ship is not under command"
"My ship is drifting"
A wire rope lashing is connected to an eye plate by means of a shackle. What is the Maximum Securing Load (MSL) for this lashing?
The Minimum Securing Load of the shackle
The Minimum Securing Load of the eyeplate
The Minimum Securing Load of the wire rope
The Minimum Securing Load of either the wire rope or shackle or eye plate
What factors do you consider as important before mooring a vessel?
Use of proper Personal Protective Equipment, Mooring stations should have effective hazard markings/ hazard highlighting, Stay clear of mooring ropes/wires, Be aware of Snap-back Zone, Proper procedures
Use of proper Personal Protective Equipment
Use of proper Personal Protective Equipment and be aware of Snap-back Zone
Use of proper Personal Protective Equipment, Well maintained mooring equipment, Make sure the area is tidy and clean, Mooring stations should have effective hazard markings/ hazard highlighting, Stay clear of mooring ropes/wires, Be aware of Snap-back Zone, Proper procedures, Effective communication
You are on a power-driven vessel underway in open water. This vessel is sighted wide on the port bow. It's bearing is opening, but its distance is closing rapidly. Which of the following is a correct assessment of the situation and the action to be taken?
Risk of collision is deemed not to to exist. However, to be sure of a safe passing distance, I will reduce my speed to allow the other vessel to pass ahead.
Risk of collision is deemed not to exist and I will maintain my course and speed. I will continue to monitor the situation.
Risk of collision is deemed to exist and I will make a broad alteration of course to starboard, sounding one short blast. I will re-assess the situation when the alteration is carried out.
Risk of collision is a possibility. I will maintain my course and speed for now, but be prepared for an alteration of course to port if the CPA seems to be less than 0.2nm as we draw closer.
During restricted visibility you are posted, as lookout, on the bridge and you hear 1 prolonged blast at intervals of no more than 2 minutes on your port bow. What will you report to the OOW (officer on watch)?
Power-driven vessel making no way on port bow
A vessel at anchor on port bow
A vessel aground on port bow
Power-driven vessel making way on port bow
What is the main reason that passenger baggage creates problems for crowd control?
If passengers are already in muster stations, you will have to allow them to return to cabins to retrieve baggage.
Muster stations are crowded, and passenger baggage takes up space.
There isn't room in the life rafts, and crewmembers will have to tell passengers to leave baggage behind.
Passenger baggage clutters escape routes, and embarkation stations, and slows down an evacuation.
With regard to radar, what would be a correct form of response to the question: What range scale are you using?
The correct form of response would be: "I am using the 12 mile range scale"
The correct form of response would be: "I am using the 3 cm radar"
The correct form of response would be: "I am using the largest range scale"
The correct form of response would be: "I am using the 10 cm radar"
Read the text in the diagram and answer this question: What should be given to prospective seafarers?
Approved training in survival techniques
Passport and visa
Recommendations
Survival and protective clothing
For what could a ro-ro vessel be held responsible by a port authority?
Vehicle emissions
Stevedore damages to vehicles
Ramp damage to the jetty
Visitors not wearing appropriate identification
What would you do if you saw a person falling overboard?
If I saw a person falling overboard I would shout once, "Man overboard"
If I saw a person falling overboard I would run to the Bridge
If I saw a person falling overboard I would inform the Bosun
If I saw a person falling overboard I would shout repeatedly, "Man overboard"
What is the meaning of this symbol ?
Immersion suit
Muster station
Direction indicator
Embarkation station
How many pyrotechnic signals to be in each lifeboat?
8 Rocket parachute flares / 2 hand flares / 6 buoyant smoke signals
6 Rocket parachute flares / 6 hand Flares / 6 buoyant smoke signals
4 Rocket parachute flares / 6 hand flares / 2 buoyant smoke signals
10 Rocket parachute flares / 12 hand flares / 5 buoyant smoke signals
How many rocket parachute flares are carried in each lifeboat?
4
12
6
Nil
An excessive pressure drop across a lube oil strainer could indicate:
Any of the above.
That the relief valve is stuck open.
That the strainer is ok.
That the strainer needs cleaning.
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