Home Online tests CES Oil tanker 2nd-Off / 3rd-Off Test online CES 5.1 for 2nd-Off / 3rd-Off, Oil tanker vessel

Online testing: Test online CES 5.1 for 2nd-Off / 3rd-Off, Oil tanker vessel

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Question 1 from 90

Hydrocarbon gas encountered in oil tankers cannot burn in an atmosphere containing less than approximately what percentage of oxygen (by volume)?

15%

11%

17%

13%

The necessary elements to create fire are

heat and chain reaction

combustible, air, flames and gas

combustible, comburent, flames and chain reaction

combustible, comburent, heat and chain reaction

*Which of the following instructions will generally be given by a port authority to allow welding or hot work in a tank having contained flammable liquids ?

When the tank has been satisfactory cleaned there shall be a 12 hour quarantine

If the mechanical ventilation is stopped, the tank shall be left within 5 minutes

All answers are good

During work in tanks, the gas concentration shall be checked every second hour

*What is the signal actuated by a fire detection system?

An audible and visual signal consisting in 7 short signals followed by a long one

An audible signal at the control panel

A visual and audible alarm signal at the control panel

A visual signal at the control panel

Fuel oil from a leaking fuel pipe has been collected in a drip tray under the boiler furnace.The oil is suddenly ignited by a backflash from the boiler burner.The boiler room is manned and the person present has the choice of various extinguishers. The fire is purely a surface fire. What would be the preferable extinguisher?

Powder

CO2

Water

Any of the mentioned alternatives

What is the minimum number of "international shore connections" that should be provided on vessels of 500 gross tonnage and upwards?

0: such connections only have to be provided on vessels over 1000 gross tonnage

What is the gas releasing device allowed for a CO2 fixed fire-extinguishing installation?

A manually operated release system only

An automatic release system activated by the ship's fire alarm

An automatic release system incorporating alarm system for manned compartments

An automatic release system activated by fire detectors

*For how long does the fixed system of foam guarantee the application of foam on the deck of an oil tanker?

40 minutes in any case

20 minutes if there is inert gas; 30 minutes if there is not

1hour 20 minutes if there is inert gas; 1 hour 30 minutes if there is not

30 minutes in any case

What is the requirement as regards stopping arrangements for power ventilation of accommodation spaces, cargo compartments, machinery spaces, service spaces and control stations?

Only a manually operated stopping arrangement is allowed

Ventilation must be remotely controlled from a central fire control panel

Ventilation must stop automatically whenever the ship's fixed fire detection and alarm system is activated

Ventilation must be capable of being stopped from an easily accessible position outside the space being served

In a smoke filled alleyway, where will the cleanest air be found, and how should you proceed out?

Near to the upper part, stand as tall as possible and walk out

Near to the lower part, therefore sit down and wait for the rescue party

It will be the same in all the parts, therefore you should just leave as quickly as possible

Near to the deck, crawl out keeping your face as near to the deck as possible

A wire aerial for an MF/HF –transmitter must be suspended between isolators:

to prevent contact with earth

to make the ………way for aerial currents as long as possible

to prevent burns when touching the aerial

Don't know

Who is responsible for keeping the required official publications onboard?

The radio officer.

The owner.

The authorities.

The master.

Due to exposure to heat fatigue, heat stroke and dehydration, what is the maximum recommended effective temperature (ET) for full work load in enclosed spaces?

27.5°C ET?

29.0°C ET?

30.5°C ET?

35.0°C ET?

Why are you only allowed to load maximum 98% of the tank capacity?

It is company policy.

Danger to vessel stability and strength.

Due to temperature expansion.

Danger of overloading.

Give the meaning of the following symbol

Emergency station

Powder handgun

Locker with protective clothing

Flame detector

Give the meaning of the following symbol

Fire main with fire valves

Foam valve

Fuel lubricating oil valves

Section valves drenching system

Norwegian merchant- and fishing vessels have to participate in the AMVER system. What is the purpose of AMVER?

Automatic system for plotting vessels with the purpose of rescue.

Weather routing.

World wide telecommunication system.

A NATO reporting system in case of joining a war-convoy.

You are Sen.Off.Deck on a vessel and you have collided with another vessel which is on fire. What would you do?

Check own vessel for any loss of life, danger of explosion and offer your assistance to the other vessel

Leave the other vessel because the other vessel was to blame for the collision

Stay close to the other vessel and commence fire fighting procedures

Commence arguing with the other Sen.Off.Deck about the reason for the collision

You are towing a vessel. The total length of the tow is 190 meters. What daylight signals are to be used?

No need of any signal.

Two black balls.

Diamond shape.

One black ball.

Two lines sent out and pretensioned equally have the same length, same breaking strength and same directional load. However, one is made of wire (which has a full load elastic elongation of about 1.5 % of its length) and the other made of nylon (which has a full load elongation of about 30 % of its length). If a sudden gust of wind increases the load on the lines, this increased load will be shared as follows:

Wire takes 55 % of the extra load. Rope takes 45 % of the extra load

By the wire and rope equally

Wire takes 45 % of the extra load. Rope takes 55 % of the extra load

Wire takes 95 % of the extra load. Rope takes 5 % of the extra load

Once a ship (equipped with self-stowing auto-tension winches) is moored alongside a loading or discharging berth, it is recommended that:

All winches to be left with the manual brake on and out of gear.

All mooring winches be left in 'auto-tension' mode

The 'spring' winches be left in the auto-tension mode and all other winches with the manual brake on

The 'breastline' and 'headline' winches be left in the auto-tension mode and spring winches with manual brake on

You are going to leave a crowded anchorage and make a 180 degrees turn. Your ship has a right-handed propeller and you can turn either way. How can you make the turn using as little space as possible?

Full ahead, rudder hard to starboard

Rudder hard to stb. , full ahead. Rudder hard to port, full astern. Repeating this manoeuvre until you have made the turn

Rudder hard to port, full astern. After you gain some sternway, rudder hard to starboard and full ahead

Full ahead, rudder hard to port

If you are called upon to reeve a new wire onto a selfstowing winch drum you would, after looking at brake arrangement, reeve it to pay out as follows:

Direction B.

Direction A.

Doesn-t matter which direction.

Depends on the lay of the wire strands.

Your vessel is at anchor. It is dense fog and visibility about 2 cables. On your radar screen you can see a vessel approaching the anchorage and the vessel is heading at your position. What will you do?

Wait and see how the situation is developing.

Try to get in touch by using the VHF.

Sound 5 short signals.

Sound three blasts in succession, namely one short, one prolonged and one short blast.

Who is responsible for the voyage plan?

The Master

The person who has done the planning

The owner

The navigation officer

Give the meaning of this symbol:

lifebuoy with light

lifebuoy

lifebuoy with light and smoke

lifebuoy with line

Give the meaning of the following symbol:

davit launched liferaft

liferaft

muster station to davit launched liferaft

muster station to liferaft

A lifebuoy is constructed to withstand a drop into the water from a height of:

30 m

4,50 m

18 m

10 m

The buoyancy and the stability of a lifejacket is sufficient to turn the body of an unconscious person in the water from any position to one where his mouth is clear of the water in not more than:

5 sec

1sec

30 sec

10 sec

Which among the following list is particularly required for a totally enclosed lifeboat ?

handrails inside for persons moving to their seats

above water escape for its occupants after automatically positioned in damaged condition

self-bailing arrangements

windows on both sides can be closed watertight and opened for ventilation

Which item among those below is included in the normal equipment of every liferaft ?

two painters of a length equal to not less than the distance from the stowage position of the liferaft to the waterline

one boat-hook

one searchlight which can work continuously for not less than 3 hours

one (two for a 13 person accommodation) buoyant bailer

How should the hook be released from a davit lowered liferaft?

Cut the weak link on the wire with the axe provided

Wait until the raft is waterborne, then pull the lanyard

Just prior to reaching the water, the lanyard should be pulled. This sets the hook which will automatically release once the raft is waterborne

Unscrew the shackle pin

The training manual shall contain instructions and information in easily understood terms and illustrated wherever possible. Which of the following objects do not have to be explained in detail in the manual according to present regulations?

Means of escape - escape routes

Illumination in launching areas

The use of all survival equipment

The use of all detection equipment

What would be the main effect on a refrigeration system of insufficient cooling water flow through the condenser?

Reduced delivery pressure

reduced suction pressure

Increased delivery pressure

Increased icing up of the compressor suction line.

On what design temperature do we need full secondarry barrier

When the design temperature is below –55oC

Only if the cargo tanks are loaded

When the design temperature is below –55oC and the tank is not independent type B or C, we must have full secondary barrier

When we are carrying cargo on less than –10oC

Which statement about the use of profiling onboard a ship is true?

A random selection process must be established.

Detection equipment can be used in place of profiling.

Profilers need at least half an hour to gather the information they need.

Only visitors can be profiled.

In a series installation of a purifier and a clarifier, what is the purpose of the clarifier

As a safety net, for improved cleaning of the fuel oil

You will probably have less alarms

In case the gravity disc is too small

To get round the problem of fluctuating temperature

When discharging dirty ballast from an oil tanker at a high flow rate with main cargo pumps, the limiting factor on permitted overboard discharge is the instantaneous rate of discharge of oil. Which of the following formulae is used to calculate this rate?

Instantaneous rate of discharge (l/nm) = oil content (ppm) x flow rate (m3/h) / speed (knots) x 1,000

Instantaneous rate of discharge (l/nm) = oil content (ppm) x 1,000 / flow rate (l/h) x speed (knots)

Instantaneous rate of discharge (l/h) = oil content (ppm) x flow rate (l/h) / speed (knots) x 10,000

Instantaneous rate of discharge (ml/nm) = oil content (ml/nm) x flow rate (l/m) / speed (knots) x 100

The Company should ensure that the ship's personnel are able to communicate effectively in the execution of their duties related to the Safety Managment System. What does it really mean?

English language should be the working language on board the ship

All personnel on board shall be familiar with the Safety Management System. The individual seafarer shall know procedures specifically related to their rank and duties onboard.

The officers and crew should read the entire Safety Management System and memorize the content.

Everyone should know the name of the Designated Person in the Company

What is the typical composition of liquified natural gas, LNG?

Mainly Butane, but with small percentages of heavier hydrocarbons such as ethane, propane, methane and pentane.

Mainly Pentane, but with small percentages of heavier hydrocarbons such as ethane, propane, butane and methane.

Mainly Methane, but with small percentages of heavier hydrocarbons such as ethane, propane, butane and pentane.

Mainly Ethane, but with small percentages of heavier hydrocarbons such as methane, propane, butane and pentane.

What is the maximum allowed oxygen content in inert gas in accordance to IMO IGC code?

Maximum allowed Oxygen content in the inert gas on gas carriers is 7% by volume.

There are no oxygen requirement on the inert gas on gas carriers

Maximum allowed Oxygen content in the inert gas on gas carriers is 5% by volume.

Maximum allowed Oxygen content in the inert gas on gas carriers is less than 10% by volume.

Which of these is not considered a method of ascertaining the watertight integrity of hatch covers?

Hose test

Chalk test

Ultrasonic test

Visual inspection

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.

What is the normally accepted maximum allowable filling limit for the cargo tanks on an LNG carrier?

100%.

90%.

95%.

98%.

What weakens a twistlock?

Lack of grease

Pitting

An oversized cone

A bent handle

What is meant by the term "keeping a proper lookout" as applied to the bridge lookout?

Keeping a visual lookout all round the vessel

Continually visually scanning the horizon all round the ship

Keeping a visual lookout all round the ship and also actively listening out for audio signals

Keeping a very visual lookout ahead and abeam of the ship

What would you do if you saw a container being damaged during loading operations?

Note the date and time of occurrence, container number and if possible take photographs

Call the duty officer

Inform the relieveing watchkeeper

Inform the master

What is the purpose of an automatic trip system onboard, and how does this function?

Automatic trip is to avoid tanks being cooled too much, the trip function is often initialised by a float switch or a temperature switch.

Automatic trip is to avoid vacuum to be generated in cargo tanks.

Automatic trip is to avoid over pressurising in cargo tanks and other pressurised vessels, the trip function is often initialised by a float switch.

Automatic trip is to avoid tanks and pressurised vessels becoming overloaded, the trip function is often initialised by a float switch.

What is the meaning of organic chemistry?

Organic chemistry is substances that contain hydrocarbons and oxygen.

Organic chemistry is substances that do not contain of hydrocarbons.

Organic chemistry is substances that contain hydrocarbons.

Organic chemistry is substances that contain of hydrocarbons, nitrogen and oxygen.

Which of the following foods will increase the cholesterol levels in the blood if eaten in excessive quantities?

Pork

Chicken

Vegetables

Fish

What roll amplitude is generally used by classification societies in calculating rolling forces?

24 - 30 degrees

18 - 24 degrees

37 - 42 degrees

30 - 36 degrees

What determines the size of the "sump" in a chemical tanker's cargo tank?

It must be below 1/3000th of the total volume of the tank.

The foot of the pump must fit inside it with a minimum of 20 cm clearance all round from the pump casing.

When combined with the estimated residues on the bulkheads and in the associated pipelines, the quantity of residues remaining in the sump must be below the maximum quantity remaining after discharge as permitted by law.

The flow of residues into the sump must be greater than or equal to the pumping capacity of the pump when operated at stripping speed (calculated as 12% of nominal speed against 3 bar head pressure), with not more than 1.5 degrees adverse list or 0.1 degree trim.

When discharging a liquefied gas carrier it is normal to leave a small amount of liquid cargo in the tanks. This is then used to help keep the cargo tanks cold on the ballast voyage. What is the normal term used for this small quantity of cargo that is left in the tanks?

The foot

The toe

The heel

The shoe

If a recipe requires that a dish be "poached", what does this mean?

Wrapped in foil and baked.

Cooked gently in a simmering liquid.

Lightly pan fried.

Turned frequently under a grill oven.

Following overhaul of the cylinder units of a 4-stroke diesel engine and a suitable running in period it is noted that the lubricating oil consumption of the engine has increased considerably and unexpectedly. The engine is otherwise running normally. Select, from the options given, the most likely cause of this problem.

A piston crown has burnt through

The oil control ring has been fitted incorrectly.

The piston rings have worn rapidly.

The cylinder liner has worn rapidly.

Some specialised vessels, mainly those involved in the carriage of fish, are capable of carriage temperatures as low as minus 60 degree Celsius. From the options given select the one that best describes why such low temperatures are used.

At minus 62 degrees Celsius the eutectic point is reached and all water in the cells is frozen.

Longer transport times are possible and hence less powerful vessels are required.

Higher charter rates can be achieved.

Quick temperature reduction is possible.

A very sensitive and valuable commodity is loaded into refrigerated container which is more than 12 years old. The container has been 'pre-tripped' with all routine maintenance having been carried out to the refrigeration plant and sensors with parts being replaced as necessary and all functions appear normal. Which aspect of using this container is most likely to cause problems during the voyage?

Degradation of the insulation due to the age of the container leading to excess heat transfer through the walls.

The accuracy of the control system of the refrigeration plant.

The age of the refrigeration plant.

The type of gas used in the refrigeration plant.

On a RoRo vessel, why should chipping and painting not be done on a loaded car deck

because there is not enough space to work with the cargo in the way

To avoid damage to the cars or their paint work

because you cant run the ventilation and the fumes will overcome the crew

Found in a commonly-used piece of equipment aboard an oil tanker, what does a "pellistor" do?

It is the common term applied to the metal, ceramic or other heat-resisting material which can cool even an intense flame below the temperature required for ignition, as utilised in a flame arrester

It is the reactive element in an oil / water interface detector

It is an electrical sensor unit fitted in a flammable gas detector for measuring hydrocarbon vapours and air mixtures to determine whether the mixture is within the flammable range

It is the electrical sensor which detects low pressure in an Inert Gas generating control system

A piston ring set for a trunk piston engine often includes a slotted ring tensioned by an internal spring. What is the purpose of this type of piston ring?

It is an oil control ring.

It is a ring to seal the crankcase from the combustion chamber.

It is the firing ring.

It is the lowest compression ring.

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 it important in a RoRo vessel to ensure that cargo is loaded in a uniform way

because it looks better and image is important

because it makes it harder to lash the cargo correctly if you don't

To prevent high sheer forces and bending moments on the vessel during the loading / discharge operations

How is positive stability maintained when loading heavy lift cargoes?

By completely filling the ship’s double bottom tanks and monitoring the loading operation

By monitoring the vessel’s stability during the loading operation

By completely filling those double bottom tanks associated with the cargo hold concerned

By listing the vessel to the opposite side to which the load is being lifted

A cable carries a current of 1500A at 660 Volts and has a voltage drop along it's length of 30volts. Assuming the cable insulation is good enough to work at High Voltage, what would be the voltage drop when supplying the same amount of power at 6600 Volts.

0.3 Volts

300 Volts

3 Volts

30 Volts

A refrigerated container is loaded onto the deck of a conventional reefer vessel and landed on flat dunnage. Select, from the options given, the most appropriate and quickest method of securing the container onto the deck.

Heavy rope lashings.

Patented chain and tension bars.

Wire rope, wire clamps and turnbuckles.

5 tonne spanset strops.

A steel spear thermometer is to be used to check the pulp temperatures of a cargo of chilled beef which is vacuum wrapped in plastic and packed in cardboard cartons. Which of the given options is the most appropriate method of using the thermometer to get the pulp temperatures of this high value commodity?

Remove the carton lid and drive the thermometer directly into one of the pieces of beef through the plastic wrapping.

Drive the thermometer directly through the carton and the plastic wrapping into the beef.

Remove the lid of the carton and place the thermometer so that it is completely covered between two of the plastic wrapped pieces of beef.

Drive the thermometer through the cardboard but avoid piercing the plastic wrappings.

TBN - total base number from a lube oil test, indicates the:

Amount of organic acids in the oil.

Amount of contaminants in the lubricating oil.

Alkalinity of the lubricating oil.

Flash point.

A palletised fruit cargo is being loaded into a cargo space which will be partly empty at the completion of loading. In order to secure the cargo which of the options given is the best way to complete the stow?

With the face of the stow athwart ships (side to side across the compartment.

With the face of the stow stepped down using cartons after breaking down the last pallets.

With the face of the stow stepped across the compartment.

With the face of the stow fore and aft along the length of the compartment.

What kind of safety protection is to be weared during a mooring operation?

Safety shoes and boiler suit.

No particular.

Gloves and helmet.

Helmet, safety shoes, gloves and protecting cloths.

What is the recommended maximum salt intake per person per day?

2,300 milligrams (0.08 ounce).

635 milligrams (0.02 ounce)

1gram (0.04 ounce)

4,600 milligrams (0.16 ounces)

Indicate the correct name for the part marked on the sketch:

Air cooler

Cylinder head

Crankshaft

Turbocharger

The pair of instruments necessary for generator synchronising are:

Voltmeter and synchroscope

kW meter and frequency meter

Amp-meter and volt-meter

Synchroscope and kVar-meter

What is dunnage considered as under MARPOL 73/78?

Waste

Cargo residue

Marine Pollutant

Garbage

With reference to the text in the frame: what is stated as a threat to lives at sea and the marine environment?

There is no immediate threat to the crew or environment

All old or new ships which are badly managed ships.

All ships aged between twenty and thirty years old.

Bad management and poorly maintained older ships.

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.

Which is the "AFT BREAST LINE", in the figure?

The aft breast line is indicated by C, in the figure

The aft breast line is indicated by B, in the figure

The aft breast line is indicated by D, in the figure

The aft breast line is indicated by A, in the figure

What do we mean to gas free a cargo tank?

To gas free a cargo tank means that we remove flammable-, neutral- or toxic atmosphere from the cargo tank

That means that we are discharging the cargo tank

To gas free a cargo tank means that we remove gas from the cargo tank

To gas free a cargo tank means that we are pumping liquid into the tank

Some liquefied gas carriers are fitted with nitrogen generating equipment, often of the membrane module design. What would be the expected purity of the nitrogen produced by such equipment?

87 to 89% pure nitrogen.

90 to 92% pure nitrogen.

100% pure nitrogen.

95 to 97% pure nitrogen.

Which of the listed sensors is suitable for physial displacement?

Pt 500

Thermocouple

Thermistor

Strain gauge

While on boiler watch in the engine room a rating is requested to assist with taking on stores. The task will take about half an hour. What should the rating do?

Just ignore the request to assist with the stores.

Go and help with the stores but go back and check the boiler every 10 minutes.

Raise the boiler water level above normal to make sure there is sufficient water while he is busy with the stores.

Contact the engineering officer of the watch for permission to assist and to arrange a relief for the duration of the store taking.

Some new maintenance routines are being planned and a risk assessment is necessary so that the required procedures can be entered into the ship's Safety Management manual. Which of the following should be the first step in this risk assessment process?

Identify the safety precautions that may be necessary to prevent injury or harm to personnel carrying out the routines.

Identify who may be harmed or injured in carrying out the maintenance routines.

Identify the hazards that may exist which may affect personnel involved with the maintenance routines.

Identify how much it will cost to implement the necessary precautions to prevent injury to personnel.

What is typical for a continuous control system

The output signal is equal to the input signal

The control valve will always be changing positionv

It is possible to predict the control mathematicallyIt is possible to predict the control mathematically

It is not possible to have a stable process

Tank top in engine room has a high quantity of oil residues floating around. When discovered, what action should be taken?

Start the fire pump.

Apply foam to the tank top to minimise the risk of fire.

Notify Ch.Eng., find cause of leakage, remedy the leakage and then immediately start cleaning of the tank top.

Open the overboard valve and start the bilge pump.

With the set point at the actual desired value, a temperature control system is giving an unacceptably large offset (difference between set point and measured value) on high load resulting in a low system temperature. Which of the actions given in the options should be taken to reduce this effect and therefore achieve closer control of the temperature?

Increase the set point to a value above the actual desired value

Crack open the manual bypass valve for the control valve.

Increase the width of the proportional band for the controller.

Reduce the width of the proportional band for the controller.

A mixed cargo of hard frozen products is to be loaded in layers into one deep cargo space on a conventional reefer vessel. The products are steel drums of frozen orange juice, frozen meat in cartons and frozen beef hocks in muslin. What would be the best position for loading the drums of orange juice?

In the middle layer.

In the bottom layer.

Since all the cargo is hard frozen it doesn't matter which layer the orange juice is loaded.

In the top layer.

Some fuel oil and lubricating oil separators have a facility to control the back pressure of the clean oil outlet. What is the purpose of this control function?

To help to maintain the oil/water interface at the correct position.

To control the amount of fuel passing through the separator.

To reduce the amount of sealing water required during operation.

To assist in discharging the bowl contents during the sludge cycle.

What is the purpose of introducing inert gas into cargo tanks?

To make the tank safe for entry.

To reduce the static electricity potential in the tank.

To create a non-explosive atmosphere in the tank.

To prevent evaporation of the cargo.

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?