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Tests en ligne : Test online CES 5.1 for Ch-Eng / 2nd-Eng
Test en ligne
Description
Le test consiste en des questions aléatoires sur un sujet sélectionné.
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Falls used in launching shall be turned end for end at an interval of not more than X months and to be renewed not later than every Y years, where the intervals are:
6 months / 2 years
30 months / 5 years
12 months / 4 years
20 months / 3 years
How many emergency power supply sources are required for fire-detection and fire-alarm systems? (SOLAS II-2/13.1.3)
Three
One
None
Two
How is the activation of any detector or manually operated call point of fixed fire- detection and fire-alarm systems to be indicated? (SOLAS II-2/13.1.4)
By all the indication methods listed
By visual and audible signal at the control panel and indicating units
By sounding the ship-s fire alarm signal in crew accommodation and service spaces
By alarm signals at the bridge and engine room control panels
*In a ship that is not fitted with a main fire control room, where is the control panel of a fixed fire detection system located?
Répondre
Fixed pressure water-spraying fire-extinguishing systems are widely employed in all kinds of vessels, mainly passenger ships and ro-ro ships, with a high degree of success. The aim of these systems is to put out a fire but they may also be very useful even if they only ensure
the control of temperatures of surrounding areas
the structural protection of the vessel
all the answers are good
the confinement of a fire
What is the main criterion generally taken into account to classify portable extinguishers:
The extinguishing agent
Their pressurisation system
The way they can be moved
Their capacity of charge
How often shall crew members participate in fire drills?
Once every year
Once every 6 months
Once every week
Once every month
In what language/languages shall the fire control plans/folders (or copies of plans and folders) be? (SOLAS II-2/20.1)
The Flag State language
The English language
The Flag State language with copies in English or French
The Flag State language with copies in English
The Urgency Message from a ship is used to notify other traffic of a situation where the ship is not in imminent danger, but where the development of the situation is uncertain and may need assistance in the near future. What is the telephony urgency message like?
RESCUE-RESCUE
SECURITE
PAN-PAN
MAYDAY
In addition to personal equipment a fireman's outfit also comprise breathing apparatus and a fireproof lifeline. How many complete sets of fireman's outfit is to be carried by all ships? (SOLAS II-2/17.3)
At least four sets
At least three sets
At least one set
At least two sets
*What is the only reliable way of checking that the CO2 cartridge in a dry powder extinguisher is full?
Remove the cartridge and weigh it to check that it has the full weight stamped on it
Check if the seal on the extinguisher release handle is intact
All of the alternatives are reliable methods
Weigh the extinguisher and check that it complies with the weight marked on it
What is the minimum number of fire control plans that should be permanently stored in a prominently marked weathertight enclosure outside the deckhouse for the assistance of shore side fire fighting personnel?
At least three
At least one
Not required providing one set is available inside the accommodation spaces
At least two
Your vessel is to turn in a narrow canal by use of one tug (turn to port with the bow). In which position and how would you use the tug? (Vessels engine will also be used).
Make the tug fast aft for pulling
Make the tug fast on port shoulder to pull
Make the tug fast in centre bow fairlead for pulling
Make the tug fast on starboard shoulder to push
Sea area A4 is in maritime radio traffic a sea area:
Don't know
with the exception of sea areas A1,A2 and A3, within the range of Inmarsat-satellites, where continuous alarm is available
within VHF-radiotelephony-range of a coast station or coastguard station, where continuous DSC-alarm is available
outside the sea areas A1, A2 and A3
Give the meaning of the following symbol:
davit launched liferaft
lower liferaft to water
liferaft
inflate liferaft
What is one of the dangerous states a survivor may suffer from?
Broken limb
Cold
Influenza
Hypothermia
What is the general emergency alarm signal as specified in SOLAS?
One long blast followed by six short blasts
Continuous ringing of the alarm bells
Seven or more short blasts followed by one long blast
Six or more short blasts followed by one long blast
How would you know how many people a lifeboat is supposed to hold ?
ask one of the deck officers
the number of persons should be clearly stated on the outside of the boats bow
no fixed number as it depends on the people's size
fill the boat up until no more space is left
Which item among those below is included in the normal equipment of every rescue boat ?
one set of fishing tackle
watertight receptacles containing water for each person
two tin-openers
one whistle or equivalent
Which item among those below is included in the normal equipment of every lifeboat ?
one immersion suit for each person
sea-charts and navigating equipment
a VHF transceiver
one whistle or equivalent
Which one of the listed requirements regarding rescue boat equipment do not correspond to present regulations? The normal equipment of every rescue boat shall include:
a first-aid outfit in a watertight case
an efficient radar reflector
immersion suits for the number of persons the boat is permitted to accommodate
two buoyant rescue quoits attached to not less than 30m of line
*How much water per person is provided in a liferaft not equipped with a desalting apparatus?
3 litres
1litre
5 litres
1.5 litre
Which one of the listed requirements regarding abandon ship drills do not correspond to present regulations? (SOLAS III/18.3.5 - 18.3.7)
on ships on short international voyages, each lifeboat shall be launched and manouvered in the water at least every six months
Different lifeboats shall, as far as practicable, be lowered at successive drills
Each lifeboat shall be launched with its assigned crew, and manouvered in the water at least once every three months during an abandon ship drill
Drills shall, as far as practicable, be conducted as there were an actual emergency
Identify this symbol:
Inertgas installation?
Emergency generator?
Escape gate?
Fire glass door?
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?
Muster of assigned stations
Donning of lifejackets and immersion suits
Boarding, launching and clearing of the survival crafts and rescue boats
Donning of fire protection clothing
Your vessel have been in collision and you are not sure if your vessel is sinking or not. How will you handle this situation?
Leave the vessel and stay not closer than 5 nautical miles.
Search for missing persons. Continue to monitor situation and prepare for abandonment in case it become necessary.
Wait and see how the situation is developing.
Make sure that the life boat has as much bunker as possible and make you course for nearest land.
How many rescue boats should be provided on passenger ships of 500 gross tons and above?
None
Two, and at least one of the rescue boats shall be a Fast Rescue Boat
One Fast Rescue Boat
Two, one on each side of the ship
Basic manual dew point measurement devices are commonly used by surveyors when monitoring the dryness of a cargo tank prior to loading a liquid chemical product. Which of the descriptions below is a summary of how the measurement is carried out?
A small quantity of Methanol is placed into the device and dry-ice is progressively added to it to steadily reduce the temperature. A sample of the atmosphere in the tank is continuously drawn through the device, passing over the surface of the Methanol. When the first signs of evaporation are observed (smoke rising from the surface), the temperature of the Methanol is noted. Reference may be required to tables to correct the reading for calculation purposes.
A quantity of Acetone is placed into the device and dry-ice is progressively added to it to steadily reduce the temperature. A sample of the atmosphere in the tank is continuously pumped through the liquid. Bubbles will be seen to reach the surface of the bath until the dew point is reached. When the flow of bubbles ceases, the temperature of the Acetone is noted. Reference may be required to tables to correct the reading for desired parameters.
A small quantity of Acetone is placed into the device and dry-ice is progressively added to it to steadily reduce the temperature. A sample of the atmosphere in the tank is continuously drawn through the device, passing over the polished or mirrored surface of the container. When the first drop of mositure (dew) is observed to form on the polished surface, the temperature of the Acetone bath is noted. Reference may be required to tables to correct the reading for desired parameters.
A small quantity of dry-ice is placed into the device, submerged in deionized water. A sample of the atmosphere in the tank is continuously drawn through the device, passing across a reagent filter. When the dew point is reached, this reagent filter will change colour from white to green, indicating saturation. The temperature of the deionized water is noted at this time and corresponds to the dew point. Reference to correction tables is required to correct the reading for barometric pressure.
What is a digital signal?
A signal indicating Revolutions per minute (RPM)
A signal used by multimeters to measure resistance.
The reading of a multimeter when indicating voltage, current or resistance.
A signal with discrete levels such as 0 = "low" and 1 = "High"
To minimise the risk of damage what type of tools should be used to clean boiler burner tips?
Brass tools.
Steel tools.
Wooden tools
Any kind of tools that are available.
Some fresh shrimps have been peeled ready for serving; some salad leaves have been washed ready for the same meal. The meal will not be served for another four hours. What will you do with these ingredients in the meantime?
The shrimps and the salad will be placed in separate containers, covered and placed in the refrigerator until required.
The shrimps will be placed in the refrigerator and the sald placed in cold water, to keep it fresh.
The shrimps and the salad will be placed in separate containers, covered in foil and left on the bench until required.
The ingredients will be combined, seasoned and dressed, transferred to open serving dishes, then placed in the refrigerator until required.
When starting a flue gas plant on an oil tanker and after all intial checks have proved satisfactory, which of the following steps will be the first in the operation sequence?
Open air vent valve
Open the flue gas isolating valve
Open blower discharge valve
Start blower
What is the usual validity of 2T SWL lashing belts?
10 years
2 years
8 years
6 years
When measuring the liquid level in the cargo tank of a liquefied gas carrier a number of different corrections may be necessary to get a true reading. Why do readings obtained from a float type ullage tape sometimes require a 'tape correction'?
The vessel may not be on an even keel when the readings are taken.
The length of tape in contact with very cold cargo vapours may contract.
The vessel may have a list when the readings are taken.
The float may become heavier and partly sink due to liquid cargo absorption.
When we are measuring viscosity with a restricted flow viscometer, the preerred sensing device is:
Capillary tube
Bourdon tube
Capacitance probe
Rotating cylinder
What is the meaning of the abbreviation "SWL" as stamped on lifting gear around the ship?
Single Winch Load.
Safe Working Load.
Single Working Load.
Safe Winch Load.
Read the text in the picture before answering the question. What is the fundamental requirement relating to the older ships, which are still in service?
The older ships should be scrapped to make way for the new builds.
The older ships must be in good condition.
The older ship must be cheaper to run than the new builds.
As a result of the new building activities, older ships are no longer required.
Which of the following certificates would always be required on a general cargo ship?
Certificate of Fitness for Dangerous Chemicals in Bulk
Noxious Liquid Substances Certificate
Safety Equipment Certificate
Passenger Ship Safety Certificate
When checking the cylinder pressures of a 6 cylinder medium speed diesel engine it is found that one of the cylinders has a high maximum pressure. What is the most likely cause of this?
Fuel pressure to the engine is too high.
Exhaust valve on the cylinder with the high pressure is leaking.
Fuel timing to that cylinder too far advanced.
Fuel timing to that cylinder too far retarded.
What is the potential effect on a steam boiler of having calcium based compounds present in boiler water and proper water treatment is not carried out?
It will cause corrosion and scale deposits in the boiler..
It will form passive layers on the metal surfaces in the boiler..
It will reduce the TDS in the boiler..
No negative effects are likely.
The piston rod of a large two stroke diesel engine has been damaged and is heavily scored in way of the piston rod gland (stuffing box). It has been decided that it is economically viable to recondition the rod at a shoreside facility. Select, from the options given, the most suitable repair method that should be used?
Recondition the rod by build up using electric arc welding and surface grinding.
Recondition the rod by machining away the score marks and fit undersize rings to the stuffing box.
Recondition the rod by surface grinding and build up using plasma spraying with metal similar to the original.
Recondition the rod by surface grinding and build up using chrome plating to give a harder running surface and avoid similar damage in the future.
Which symptoms would indicate piston blow-by when operating a 4 stroke trunk piston type engine ?
Increased pressure in the air inlet manifold.
Increased pressure in the crankcase and smoke at the crankcase vent.
Smoke and sparks from the scavenge manifold drains..
Increased temperature in the inlet air manifold on the engine.
The Chief Engineer tells you to carry out Hot work on deck. What kind of permit do you need?
Hot work permit
No permit is required as long as the work shall be carried out on open deck
Cold work permit because the work will be carried out on open deck
Work permit
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.
What is the requirement with regard to Familiarisation on board?
During the first tenure, seafarers are responsible for asking at least a 100 questions to the Safety Officer.
Seafarers, on being assigned to any ship, shall be familiarized with their specific duties and with all ship arrangements, installations, equipment, procedures and ship characteristics that are relevant to their routine or emergency duties.
Seafarers on board passenger vessels must as soon as possible learn the names of all persons working in the same department in order to ensure efficient daily operation.
Seafarers shall be familiarized with all life saving appliances and emergency exits in case any emergency situation occurs. It takes normally an hour to complete the Safety Familiarisation. The safety Officer is responsible.
In the context of oil tanker operations, what is "clingage"?
Oil residues remaining in the bottom of a cargo tank after tank-cleaning
The resistance to flow in a pipeline during the discharge of an oil cargo
Electrostatically charged bubbles of air and moisture suspended in an oil cargo after loading
Residues remaining on the inside of a pipeline, or on the internal structure of a cargo tank after an oil cargo has been discharged
On the figure 4 possible definitions of the term "AHEAD" are given. Which one is the correct one?
Ahead is given by C on the figure
Ahead is given by B on the figure
Ahead is given by A on the figure
Ahead is given by D on the figure
The 'Critical Temperature' is important when dealing with liquefied gas cargoes. What is the IMO Gas Codes' definition of the term 'Critical Temperature'?
It is the temperature at which vapours from a liquefied gas cargo will self-ignite.
It is the temperature above which a gas cannot be liquefied by pressure alone.
It is the temperature at which liquefied gas cargoes give off flammable vapours.
It is the temperature at which a cargo of liquefied gas must be carried.
The temperature control for the central cooling system low temperature circuit has failed and a new 3 term controller is to be fitted. Which of the given options would be the correct method of setting up the controller?
Set the derivative action first.
All three actions should be set simultaneously.
Set the proportional action first.
Set the integral action first.
A vessel’s forward draught reading is 8.50m with a correction factor of 0.0242m; draught marks are painted abaft the forward perpendicular. What is the corrected forward draught if the vessel is trimmed by the stern?
8.4758m
8.5242m
8.5484m
8.4516m
When loading a General Cargo ship, what do logs, fishmeal, scrap metal and bales of cotton have in common?
They are all capable of causing oxygen depletion in the cargo holds
They are all liable to spontaneous combustion
Fires caused by these cargoes cannot be extinguished using carbon dioxide gas
They contribute to ship's sweat
Why are pure RoRo car carriers considered as being high risk design vessels where their stability is concerned.
Because they have few internal bulkheads
Because of the relatively small clearance between waterline and stern ramp sill when fully loaded
Because they can easily capsize if there is ingress of water or ballast operations are not handled correctly
On the figure 4 possible definitions of the term "BREADTH" are given. Which one is the correct one?
Breadth is given by C on the figure
Breadth is given by A on the figure
Breadth is given by B on the figure
Breadth is given by D on the figure
Why do we use stabilisers on passenger ships?
To adjust the trim of the vessel
To decrease the rolling angle of the vessel
To increase the intact stability
To decrease the dynamic stability
What is the purpose of "Glycol Water Heating"?
The system heats glycol water which is pumped around cofferdam system to maintain the temperature inside those spaces, when loaded, at approximately - 5 C.
The system heats glycol water which is pumped around cofferdam system to maintain the temperature inside those spaces, when loaded, at approximately +25 C.
The system heats glycol water which is pumped around cofferdam system to maintain the temperature inside those spaces, when loaded, at approximately +15 C.
The system heats glycol water which is pumped around cofferdam system to maintain the temperature inside those spaces, when loaded, at approximately +5 C.
What dangers are associated with the carriage of empty tank containers?
They may not declared as being empty when in fact they are not
They could easily collapse due to being empty
They may contain flammable cargo residue
They could explode if their vents are closed
How is responsibility for the stowage and securing of containers determined on multi-purpose vessels?
By wording in the charter party
By advice from the Supercargo
Responsibility always lies with the charterer
Responsibility always lies with the attending surveyor
When people jump into the water from a ship, what should they do?
Keep their arms down at their sides.
Grab the lifejacket near the shoulder.
Take off their lifejackets.
Take off their shoes.
A cargo pumproom must be mechanically ventilated. What is the minimum number of atmosphere changes per hour that such a system must achieve?
10 changes per hour.
There is no specified minimum number of changes, provided it is running continuously throughout any cargo operation.
30 changes per hour.
20 changes per hour.
The auxiliary boiler for the supply of low pressure heating steam has an automatic combustion control which operates on a two step control principle. The boiler fails to attempt to start up during a period of normal operation even though the steam pressure has fallen below the set point. What is the most likely cause of this fault?
The photocell for detecting flame on is dirty.
The pressure switch for the combustion air supply is faulty and remains open.
The pressure switch for low steam pressure is faulty and fails to close.
The electrical supply for the control system is isolated.
On a Container vessel, why must duty crew members supervise the lashing of containers?
Because stevedores often apply container lashings haphazardly or place twistlocks incorrectly
Because of local port regulations
Because of time constraints on the vessel towards the end of cargo operations
Because it is an international requirement under the ISM Code
Where should fixed stacking cones be positioned?
On deck in non-cellular vessels
At the base of cell guides
Between containers in under-deck stowage locations
On the tank top in non-cellular vessels
The water cooling space on the turbocharger is damaged and you have no spares. The cooling water must be closed. Which steps would you take to ensure least possible damage?
Make no modifications, but tell the duty engineer to pay special attention for abnormalities
Run the engine at a lower speed
Cool the turbocharger by means of air.
Dismantle the rotor and assemble the sealing plate
Which of the following options is the most likely cause of high exhaust gas temperatures in all cylinders of a diesel engine?
Water in the fuel supply.
Partial blockage in the exhaust gas system.
Worn or broken piston rings.
Faulty high pressure fuel pump on one of the cylinders.
What is the correct procedure to adopt when a liquid gas fire occurs?
Inform OOW
Start to extinguish the fire
Check the emergency plan
Promptly locate the fire and raise the alarm
What name is applied to foods (in particular meat) that have been prepared according to the rules of Islam?
Kamal.
Hamal.
Tamal.
Halal.
During a routine check of one of the auxiliary engines in an UMS operated engine room, a minor leakage on a high pressure fuel pipe was observed. What would be an appropriate action and/or precaution to be taken? (Assume normal operation; 2 sets operating and 1 set standby)
Any of the mentioned alternatives will meet the requirement.
Have a motorman on watch for the rest of the night, especially instructed to watch the engine
Change the operation to the third generator set, leaving the original set as stand-by awaiting possibility to repair the failure.
Change operation to the third generator set, preparing the original set for repair of the failure and switching to manual mode until repair is carried out.
Prior to personnel being allowed to work inside cargo tanks on a liquefied gas carrier the tank atmosphere must be checked. What are the required readings for oxygen content and hydrocarbon gas content of the tank atmosphere before normal entry permits are issued and entry into cargo tanks is allowed according to the IMO Gas Codes?
21% oxygen by volume and 1% hydrocarbon by volume.
20% oxygen by volume and 1% of LEL for hydrocarbon
20% oxygen by volume and 0% hydrocarbon by volume.
21% oxygen by volume and 0% hydrocarbon by volume.
What can cause crewmembers to abdicate their safety roles?
Inadequate fire-fighting training
No lifeboat drills for passengers
Lack of leadership
Inadequate fire-fighting provisions
Where will you normally find the ship's documents including Crew Passports and CDC on board a vessel?
On the bridge
Ship's Office
Telly clerk room
Master's cabin
How should mild steel slabs be loaded in a bulk carrier?
Interlocked across the entire cargo hold with the longitudinal axes athwartships
Interlocked up to the hopper tank plating with the longitudinal axes athwartships
Interlocked across the entire cargo hold with the longitudinal axes fore and aft
Interlocked up to the hopper tank plating with the longitudinal axes fore and aft
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.
Where should grease be applied to a twistlock?
Over the entire outer surface
Under the handle
Between the twistlock cone and associated housing
At the base of the twistlock cone
What measures should be taken when handling mail?
Wear rubber gloves and protective clothing when opening suspicious looking mail.
Open any mail that looks suspicious.
Tear open letters with your hands.
X-ray or scan parcels before opening them.
On the figure 4 possible definitions of the term "BRIDGE" are given. Which one is the correct one?
Bridge is given by B on the figure
Bridge is given by C on the figure
Bridge is given by D on the figure
Bridge is given by A on the figure
The circuit shows a full-wave bridge rectifier. Which electronic component will you connect between 'a' and 'b' in order to obtain reduced ripple voltage to the load RL.
Zener diode
Capacitor
Inductive reactor
Resistance
The purpose of remotely controlled measuring of tank levels are to measure:
Height from bottom shell to top stringers in the tank
Height of liquid in the tank
Height from liquid surface to top stringers in the tank
Height of bottom girders in the tank
When starting three phase induction motors which of the following starting methods will immediately apply rated voltage to the machine?
Soft starter
Star Delta
Direct on Line
Auto - transformer
When loading a static accumulator oil, which of the following is a standard precaution applied to eliminate the risk of explosion through electrostatic charge in the tank?
No metallic sampling devices over 2 litres capacity should be permitted on the cargo deck at any time, unless thoroughly cleaned beforehand with soapy water
No metallic devices, such as those used for gauging and sampling, should be introduced into the tank during loading and for 30 minutes after completion of loading
No rubber containers over 1 litre capacity, such as those used for sampling, should be introduced into the tank between completion of loading and for 10 minutes after that time
No plastic, or plastic coated devices, such as those used for sampling or gauging, should be introduced into the tank unless bonded, at any time
Which of the following cargoes can normally be loaded next to each other in the same space of a General Cargo vessel?
Drums of cement and bagged milk powder
Drums of cement and steel pipes
Pallets of pesticides and bagged grain
Rolls new carpets and drums lubricating oils
The diagram shows the direction that a rope runs during a mooring operation and a possible place where it may break. Where would be considered the safest position to stand?
Inside the blue coloured zone.
Behind the point of restraint, but inside the blue coloured zone.
Between the "point of break" and the "fairlead".
Outside the blue coloured zone.
What is the main purpose of bottom-blowing a boiler?
To check that we do not have any leak of smoke and gases in the combustion camber.
To control that water is present in the water chamber, when the boiler is in active operation.
To adjust steam pressure when the burner capacity is excessive.
To get rid of sludge in the water chamber.
On the air compressor's crankcase there is a small valve that lets off overpressure. What do we have to do if this valve is letting of pressure and oil moisture ?
Block the valve because it pollutes the engine room (block off the valve).
Increase the flow of cooling water.
Check the clearance in the bearings.
Overhaul the compressor unit.
The purpose of the wear ring for the illustrated pump is to -
Provide a replaceable wear surface for the shaft.
Absorb all impeller thrust.
Provide a replaceable wear surface for the pump housing/impeller.
Support the end of the impeller.
Tank (4) in the outlet piping is designed to:
Provide an air cushion
Take up the difference in water volume at changes of temperature
Maintain a constant head in the system
Prevent air accumulation in the cooling water system
What are the compartments to be regularly checked with regard to water and oil leakages?
All those listed in the other alternatives
Tank top in the engine room.
Bilge tank(s)
Bilge wells
You have a brine-system onboard with steam heating for defrosting. Which liquid will You circulate first through the heater to avoid damage on the heater?
Open carefully for the brine.
Raise the temperature on the brine.
Both at the same time.
Open for the steam first to avoid freezing of condensate inside the heater.
In a circuit diagram of a simple hydraulic system, what does the following symbol indicate?
Throttle valve.
Directional control valve.
Pressure relief valve.
Check valve.
The cooling water temperatures in and out of the engine become too high. What is the most probably reason for this?
The temperature in the engine room is too high.
The lubricating oil has too high temperature.
The control valve for the cooling water cooler is sticking.
Fouled cooling water system.
What is this kind of controller normally called?
A cascade controller.
A two point controller.
A double acting controller.
A two way controller.
Ce test en ligne se compose de 90 questions aléatoires issues des tests CES 5.1 sur un sujet de votre choix.