Тест состоит из случайных вопросов по выбранной теме.
With an increase in temperature the volume of flammable and combustible liquids :
Remains constant if pressure remains constant
You are at the mainfold with the cargo surveyor, drawing samples at the start-up of cargo. A sample of 2-Ethyl Hexanol is off colour. The surveyor instructs you to open the manifold valve and start loading. What will you do?
Tip the sample into the drip tray and draw more samples until it clears. A maximum of ten litres may be drawn and dumped before it is considered a problem.
Open the manifold valve as requested but make a note in the log-book regarding the off-colour sample.
Keep the manifoild closed, report the situation to the Chief Officer.
Open the necessary tank loading valves and then open the manifold valve. With this product, the colour will soon clear.
Who should be informed first when receiving a distress signal from another ship/vessel?
The nearest coastal radio station
What would be the correct definition of the term "Squat"?
Squat is the reduction of underkeel clearance due to increase of water flow under the keel and an increase in the water pressure
Squat is the reduction of underkeel clearance of a ship when it moves through shallow water due to a reduction in water pressure.
Squat is the loss of effectiveness of the rudder and propeller as a ship moves through shallow water due to the reduction of water pressure.
Squat is the reduction of underkeel clearance and the possible change of trim of a ship when it moves through shallow water due to a reduction in water pressure.
Your ship is drifting in open sea with temporary engine malfunction. You are equipped with precise navigation equipment. What should you do in this situation?
Go to bed and wait for the engine to be ready
Use the opportunity to plot direction and rate of drift for later use
Call the company immediately
Ask the Chief Engineer when the engine will be ready
Can RNC charts be used for voyage planning?
Only in conjunction with paper charts
Only if approved by the flag state
The manually controlled inside lamp must be capable of working at minimum for a period of:
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:
What is the weather associated with being in the centre of an Anticyclone (a region of High Pressure)?
Persistent rain and very humid weather
Strong winds and heavy rain
Strong winds but with very little rain
Light winds and fair weather, sometimes fog.
According to 33 CFR 156, oil tankers trading in US waters are required to test and document the testing of cargo transfer hoses and transfer pipe system. What is the minimum requirement when testing these components?
That no leakage occurs under static liquid pressure of at least 1.25 times the maximum allowable working pressure.
That no leakage occurs at the nominal anticipated working pressure.
That no leakage occurs under dynamic fluid pressure of less than 1.5 times the maximum allowable working pressure.
That no leakage occurs under static liquid pressure of at least 1.5 times the maximum allowable working pressure.
Most fruit cargoes carried under refrigeration require introduction of fresh air into the cargo space to remove any excess carbon dioxide and ethylene produced by respiration of the cargo and sensors are fitted to detect these gases. Shipper's instructions will often indicate 'constant air change' as a requirement for a cargo. Why, even though this is a crude method for controlling the cargo space atmosphere, is this type of instruction given?
Some cargoes are very sensitive to ethylene levels and it may be difficult to accurately measure the low levels that would affect a cargo.
It is the standard method and it is always done that way for simplicity.
Fresh air helps to acclimatise the cargo to the prevailing ambient conditions.
As much fresh air as possible should always be introduced into the cargo space throughout the voyage to maintain cargo quality.
Why do we use stabilisers on passenger ships?
To decrease the rolling angle of the vessel
To adjust the trim of the vessel
To increase the intact stability
To decrease the dynamic stability
LNG carriers are fitted with a deck water spray system? In addition to providing protection against fire and protection for the crew and cooling in the event of a fire in the cargo area, what is the other main purpose of having this system?
To heat the cargo area in case of a cargo spill incident.
To make it easier for the crew to keep the decks clean.
To extinguish fires inside the cargo tanks.
To flush cargo spill overboard and protect crew in case of a cargo spill incident.
What should be clearly marked on the cowl ventilators of a General Cargo Vessel?
The date when last painted
The Open and Closed positions with the last date of testing
The last internal inspection date
For which duties are gear and screw pumps normally employed?
Main sea water circulation systems.
Fuel and lubricating oil services.
Jacket cooling water circulation for diesel engines.
Why should wet cloths not be used for carrying hot cooking pans?
Because Health and Safety regulations prohibit the use of a wet cloth within 2.5 metres of a galley range.
Because they conduct heat quickly and may cause scalding.
Because a cloud of steam will be generated and the person carrying the pans may find it difficult to see where he is going.
Because the mositure will transfer to the pan and cool the contents.
What should be observed concerning a ship's water tight integrity?
That all water tight ramps and doors are locked and secured at sea
The ramp is in stowed position
That all emergency exit doors are locked and secured
Where do you find detailed information and specific technical requirements for life-saving appliances?
Life-Saving Apliance Code (LSA Code)
On a Container vessel, what is the function of a lashing plate?
As tie down point for turnbuckles on deck or hatch cover
A means of securing buttresses under-deck
A means of securing the hatch covers
A means of securing lashing chains
A bulk carrier is to carry a full deck cargo of packaged timber; to what regulations must the vessel comply?
International Code for the carriage of Dangerous Goods
IMO Code of Practice for the carriage of Timber Deck cargoes
Marine Pollution Regulations
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.
Following replacement of a diesel alternator governor the machine is test run on load. It is found that as the load is gradually increased the voltage and the frequency gradually fall to an unacceptable level. The governor is a mechanical hydraulic type. Select from the options given the correct adjustment to make to correct the situation.
The governor load limit should be increased.
The governor droop should be increased.
The governor droop should be reduced.
The governor load limit should be reduced.
What is a Continuous Synopsis Record?
A plan including all security measures onboard
A record of the vessels history
A record of all security incidents
A plan for continuous maintenance of security equipment
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.
Wait to make sure that the CO2-system is discharging into the engine room before leaving.
Immediately go for the nearest fire extinguisher.
This is a typical emitter follower. What is the main benefit obtained by use of an emitter follower?
The collector can be connected to as high voltage as 10 V DC
The V out is always equivalent to the V in
The input impedance is made much larger than the output impedance
The input impedance is made much smaller than the output impedance
What might safely be used to prevent a load swinging when lifted by a crane?
Personnel underneath the load, holding onto it and restricting its movement.
Guide or tag lines, tended from a safe location.
Short, jerky movements on the ship's controls.
A positive temperature coefficient thermistor will typically have
Relatively linear characteristic
Relatively non linear characteristic
A heavy piece of machinery is loaded on deck of a container vessel, stowed across several flatrack containers. Select the most appropriate lashing method.
All lashings to be taken to the hatch top.
Some lashings direct to the flat rack and some to the hatch top, coaming and pillars.
All lashings to be taken to the flatrack lashing points.
All lashings to be taken to the hatch coamings, pillars and lashing bridges.
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………
On a RoRo vessel, with regard to the characteristics of a mafi trailer, what must be ensured prior to disconnecting from the tug on board?
That after unfastening it will not move
That there is sufficient room for it to be driven away
That cargo on the trailer is not damaged
Which of the following could be the possible cause of too high cargo condenser pressure?
Incondensible vapour in the cargo and shortage of refrigeration.
Incondensible vapour in the cargo.
Broken discharge valve plate.
Shortage of refrigeration.
What type of discharge pumps are normally in use on gas carriers
It is screw pumps that is normally used on gas carriers
It is centrifugal pumps that is normally used on gas carriers
It is piston pumps that is normally used on gas carriers
It is submerged pumps that is normally used on gas carriers
The figure shows a cross section through a ship floating in water, with the hull in red and the seabed below the ship shaded. On the figure there are four (4) possible definitions of the term "FREEBOARD" given. Which one is the correct one?
Freeboard is given by B on the figure
Freeboard is given by C on the figure
Freeboard is given by A on the figure
Freeboard is given by D on the figure
Every oil tanker of 5,000 tonnes deadweight and above delivered on or after 1 February 2002 shall comply with intact stability. What is the minimum GM (metacentric height) when the vessel is in port?
You are an assistant cook, working on a large passenger ferry. You have a boil on your left wrist, which has become infected. What must you do?
Take two paracetamol and cover the boil with a small flesh-coloured band-aid.
Don't tell anyone about it, wear a long sleeved jacket and carry on working.
Report the condition to your superior, obtain medical assistance, avoid handling foodstuffs until the skin has healed.
Wear a cotton glove on your left hand when carrying any raw or fresh foodstuffs.
What is the most likely cause of the boiler exhaust gas being white in colour leaving the funnel?
Insufficient combustion air.
A faulty or dirty burner tip
Low water level in the boiler.
As part of the routine duties a rating on boiler watch is requested to assist with the daily chemical treatment for the boiler and feed water systems. Where will the rating find the information relating to the hazards associated with the chemicals involved in this task?
The engine room log book.
The Code of Safe Working Practices for Merchant Seamen.
The Chief Engineer's standing orders.
The material safety data sheets supplied with the chemicals.
How would you ventilate your cargo holds when sailing from cold climate to hot climate?
No ventilation should be done?
Ventilate at intervals during the night?
Ventilate at intervals during the day?
Gas tankers are often fitted with fixed water spray system for fire protection purposes for deck areas, deck tanks, deck manifolds and pipelines. What is the minimum required flow rate of water per minute for horizontal and vertical surfaces to ensure adequate, uniform coverage of these areas?
100 litre/m2 per minute for horizontal surfaces and 50 litre/m2 per minute for vertical surfaces.
20 litre/m2 per minute for horizontal surfaces and 10 litre/m2 per minute for vertical surfaces.
10 litre/m2 per minute for horizontal surfaces and 4 litre/m2 per minute for vertical surfaces.
50 litre/m2 per minute for horizontal surfaces and 25 litre/m2 per minute for vertical surfaces.
Zener barriers are sometimes used to supply power to electronic equipment in hazardous areas. Which statement is correct with regards to power supply for equipment supplied through Zener-barriers?
The 0-volts line must always be grounded.
The +24V must always be grounded.
The 0-voltage must never be grounded.
The - 24V must never be grounded.
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.
High level and high-high level alarms in cargo tanks on chemical tankers are normally set to activate at which of the following percentage filling levels?
How many lifejackets are required in a passenger cabin?
Twice the number of beds in the cabin
Same number as beds in the cabin
Non, they will be handed out at the muster station
How does a chemical detector tube work?
A sample of the atmosphere inside the compartment is drawn through a chemical reagent in a glass tube. The surface of the reagent becomes progressively discoloured as more contaminant vapour is detected in the sample. When this is read off the scale marked on the tube, the concentration of the vapour can be determined.
A sample of the gas from inside the compartment is sucked through a glass tube containing white cotton. As it does so, the gas becomes discoloured. The cotton will gradually dissolve and be replaced by the coloured gas, according to the concentration level. This may be read off a scale on the tube at the edge of the remaining cotton.
A sample of the air inside the compartment is pumped into a glass tube. As the pressure builds up inside the tube, a coloured stain can be observed, corresponding to the vapour pressure of the contaminant gas. The length of the stain corresponds to the percentage concentration of the gas.
The mositure in a sample of the atmosphere inside the compartment is allowed to soak into a strip of foam in a glass tube. This foam is impregnated with a reagent chemical. If it turns red, then the compartment is unsafe for entry; if it turns green, then entry is permitted.
You are on a sailing vessel, underway in open water. This vessel is sighted on the starboard bow, on a steady bearing and the distance is closing. By the International Regulations for the Preventing Collisions at Sea, what action will you follow?
This vessel is clearly a power-driven vessel and I anticipate that the bearing will therefore close and she will pass ahead at a safe distance.
Risk of collision is deemed to exist and, as the other vessel is on a steady bearing on my starboard side, I am required to keep out of the way. I will make a broad alteration of course to starboard.
Risk of collision is deemed to exist and, as the other vessel is on a steady bearing on my starboard side, I will maintain my course and speed.
By Rule 18, a power-driven vessel underway shall keep out of the way of a sailing vessel. I will maintain my course and speed, but will continue to monitor situation to ensure the other vessel takes avoiding action.
Which plan shows the position of the vertical and longitudinal centres of gravity for each cargo compartment of a Bulk Carrier?
What is the benefit of using prismatic Type "B" tanks?
The benefit of maximising ship hull volumetric and having the entire cargo tank placed beneath the main deck.
The tank is completely self-supported and do not form part of the ship's hull structure.
The hold space can be filled with dry air.
The secondary barrier form part of the ship's hull.
The sign on the image indicates:
Location of lifebuoy with self-igniting light and self-activated smoke signal
This is the location where you should operate pyrotechnic equipment (Buoyant smoke signal, hand flares and rocket parachute flares) In case of an emergency
Location where you should throw lifebuoys in case a man- over-board situation occurs.
Hydrogen Sulphide in crude oil and certain other oil products is most obviously associated with problems of vapour inhalation, but which of the following is also a serious problem associated with this component, particularly in high concentrations?
When is it necessary to seal a CO2 injection line into the designated ballast hold?
When testing the CO2 system
Prior to ballasting the hold
When carrying non-inflammable cargoes
When handling cargoes that emit dust
What would be the likely cause if the shaft of a centrifugal pump shows excessive wear in way of the stuffing box?
The discharge pressure of the pump is too high.
Wrong direction of rotation of the pump.
Over tightening of the gland packing.
Incorrect material used in construction of the shaft.
Vapour Leakage. A small leakage of vapour through the membrane may not be readily obvious. However, indications are likely to be:
A sudden rise in the percentage of methane vapour in one primary insulation space.
Temperature change will be obvious.
Water building up in the insulation space.
Your ship is loading at a Single Point Mooring. You are the rating on duty. Which of the following areas will you monitor continuously throughout your watch?
Forcastle head / manifolds / maindeck
Pump room / engine room / Cargo Control Room
Accommodation ladder / Radio Station / Poopdeck
Bridge / Cargo Control Room / Poopdeck
What is important to prepare prior to a helicopter operation?
To stop the vessel completely
To increase the speed of the vessel
To light up the area for pick-up
Make sure all loose deck equipment at helicopter deck is stowed away and secured.
A General Cargo vessel develops an angle of loll while loading a heavy item of deck cargo alongside; what is the action to be taken ?
Stop cargo, increase FSE in tanks, lower weights within vessel and fill small ballast tank on high side of vessel
Stop cargo, reduce FSE in tanks, lower weights within vessel and fill small ballast tank on high side of vessel
Stop cargo, increase FSE in tanks, lower weights within vessel and empty small ballast tank on low side of vessel
Stop cargo, reduce FSE in tanks, lower weights within vessel and fill small ballast tank on low side of vessel
Which of the tools given in the options is the best one to select for cutting a new external thread on the end of a steel pipe?
Fluid flow is measured using a pneumatic differential pressure transmitter and is indicated on a direct reading instrument. The indicator is reading zero even though fluid is flowing through the system. When the flow rate changes the indicator initially registers a reading but then gradually returns to zero. From the options given select the probable cause of this condition.
The connection to the differential pressure transmitter low pressure bellows is blocked.
Diaphragm in the differential pressure transmitter is perforated.
The I/P converter is faulted.
The connection to the differential pressure transmitter high pressure bellows is blocked.
The picture shows a liquid filled thermometer. Liquid filled thermometers and manometers are often installed onboard ships. What is the main purpose for the liquid filling of such pointer instruments?
Keep the rear side of the front glass clean
Avoid water penetration from outside
Reduce mechanical wear on the internal parts caused by vibration
Compensating for changes in ambient temperature
What is the maximum pressure that the safety valve on a steam boiler should be set to lift?
3% above the normal working pressure.
10% above the normal working pressure.
At the maximum design or maximum permitted working pressure of the boiler.
3% above the maximum design pressure..
Why should elevators not be used in an emergency?
Too few people can be moved in an elevator.
The elevator is reserved for people with special needs.
Power could fail and passengers could be trapped inside.
Engineering will shut down the ship's power and the elevator will be useless.
What criteria are used to assess a bulk carrier’s Fatigue Strength?
The option of alternate hold loading
The ship’s deadweight at the summer loadline
Midship section scantlings
A consequence of operating a centrifugal pump with the discharge valve closed would be:
In which part of the oceans and in what season is Parametric Rolling likely to be experienced?
Around South Africa at any time of year
On a conventional reefer vessel carrying palletised cargo, dunnage bags (air bags) are used to prevent the pallets from moving during bad weather. Assuming that the air bags are correctly positioned and inflated, select, from the options given, the other important function provided by these bags
They will help to achieve a good stowage factor.
They will prevent short circuiting of the cold air.
They will prevent chafing between the pallets
They will protect the ships structure.
The meaning of lapping a valve and valve seat is:
Machining the valve in a lathe machine.
Grind the valve against the valve seat to obtain a uniform sealing surface
Adjust the overlapping of the inlet and exhaust valves
For a search to be effective it must be:
Conducted by personnel with limited knowledge of the ship’s layout.
Inclusive of all personnel.
The circuit diagrams illustrate four different methods of wiring between a Pt 100 temperature sensor and its signal processing electronics. Which of the wiring methods gives the best measuring accuracy?
Refrigerated cargoes are generally easy to secure for a sea passage when compared to some bulk, timber and project type cargoes. The cargo must be stowed so that it will not shift during the voyage and so that a good air flow can be maintained through the cargo. Which one of the given options is most likely to result in this required outcome and a successful carriage?
A tight uniform stow but with vertical gaps in the cargo for air flow.
The stow is unimportant as it is only the temperature in the hold which determines whether or not the cargo is carried successfully.
A tight uniform stow which forces air through the cargo.
Many chemical tankers are fitted with deepwell centrifugal cargo pumps. What is the process by which any leakage of cargo or hydraulic oil into the pump cofferdam is detected?
When securing a non-standardized portable tank what is a favourable securing angle that will prevent it from transverse sliding?
Where can the information be found as to what actual cargoes a liquefied gas carrier can carry?
Safety Construction Certificate.
Safety Equipment Certificate.
What is class "A" division
Bulkhead constructed of steel, suitably stiffened and insulated so as to be able to meet a prescribed fire test of one hour duration
Bulkheads used to divide a vessel in different parts
Bulkhead used to divide a ship horizontally
Bulkhead to divide accommodation from the cargo spaces
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 ingredient, made from durum wheat, is commonly used as an alternative to rice with north-African dishes?
The best way to ensure you get the equipment you need is to:
Buy what everyone else is buying.
Determine your needs and do some research.
Buy the most expensive equipment on the market.
What English name is given to a kind of heavy-duty, wide-bladed knife, used for dividing joints of meat or poultry and which is much favoured by cooks of far-eastern nationalities for a wider range of cutting tasks?
When disconnecting the cargo hose after discharging, some oil is drained into the drip-tray under the manifold which already contains a small amount of dirty water. What is the correct way to dispose of this oil?
Drain it to a cargo tank.
Mix in an appropriate quanoity of dispersant chemicals and drain it overboard when in open water.
Drain it overboard when the vessel is 50 nautical miles off the coast.
Transfer it to the sloptank and later discharge it to a reception facility.
Which of the following is false when a casualty is bleeding?
Encourage patient to lie quite and re-assure
Cover the wound with a cloth
What is the letter ‘P’ under the IMDG Code?
Most perishable cargoes are presented for shipment pre-cooled to the correct carriage temperature. If the cargo is not pre-cooled or has warmed up due to the cold chain being broken it can result in increased metabolic rates. Which of the given options would be the most difficult to deal with if such a situation occurred during a sea passage?
The water produced by the cargo.
The heat produced by the cargo.
The carbon dioxide produced by the cargo.
The trace gases produced by the cargo.
During bunker transfer operations, deck scuppers should be:
Plugged to prevent spilled oil flowing overboard
Only fitted to the side of the vessel that bunkers are being loaded
Attended by crew to collect any spilled oil that approaches
On a Container vessel, to what would a fibreglass yacht be secured after lifting onboard?
Two reference points for pressure exist, absolute zero and atmospheric pressure. What do you call pressures measured relative to absolute zero?
This circuit consists of a current source I, a change-over switch S, a resistor R and a capacitor C. The current/time figures 1 to 4 show possible changes in the current I in case the switch S is suddenly shifted from position 1 to 2 at time t= 0. Only one of the diagrams is correct. Which?
On the figure 4 possible definitions of the term "AFT" are shown. Which one is the correct one?
Aft is defined as B on the figure
Aft is defined as C on the figure
Aft is defined as A on the figure
Aft is defined as D on the figure
If something is broken or missing, what should the First Mate do?
He is to notify the Chief Officer
The First Mate is to get rid of the lifeboat
He is to replace or repair whatever is wrong
What shall you do if you see a person falling into the sea?
Throw a lifebuoy over board and report to the bridge immediately.
One of the checks during the annual Class survey of the UMS functions is focusing on cleanliness of the engine room. What is the reason for such a check ?
To avoid frequent alarms.
To prevent risk of pollution.
To reduce the general risk of fire in an unmanned engine room.
To have the engine room looking tidy.
How many 'thermal protective aids' are required to be carried on vessels with open lifeboats?
Each lifeboat should carry the same number of thermal protective aids as the number of persons it is designed to carry
One for each person on board who is not provided with an immersion suit
They are not required, providing the boat has a canvas canopy which can be rigged in cold weather
How much food per person is supplied in a lifeboat?
None - only barley sugar sweets supplied