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Maison Tests en ligne CES Oil tanker MASTER / Ch-Officer Test online CES 5.1 for MASTER / Ch-Officer, Oil tanker vessel
Tests en ligne : Test online CES 5.1 for MASTER / Ch-Officer, Oil tanker vessel
Test en ligne
Description
Le test consiste en des questions aléatoires sur un sujet sélectionné.
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In a fixed gas fire-extinguishing system
An audible alarm must sound when the CO2 is being released
An audible alarm must sound when half of the initial amount of CO2 has been released
An audible alarm must sound for a suitable period before the CO2 is released
All the answers are good
"B" Class divisions in ships are constructed so that they are capable of preventing the passage of smoke and flame to the end of a standard fire test held for how many minutes?
45 minutes.
15 minutes
60 minutes.
30 minutes.
*Which of the following action must imperatively be carried out before the central gas extinguishing system is used on a fire in engine rooms, cargo holds or other confined spaces?
Make sure that all openings to the compartment must be closed
Close down boilers
Stop all engines except for the emergency source of electrical power
Make sure that the compartment has been evacuated
By a ‘geographical area call’ in the DSC system is meant:
Don't know
a DSC message for all vessels within a certain area from a position in the DSC message, and the degrees are given in northerly and westerly direction
a DSC message for all ships heading towards a certain geographical area
a DSC-message for all vessels within certain area marked by areference position, given in the DSC message and the degrees are given in southerly and easterly direction
What is false regarding the function :” Transmission and reception of signals for locating ”
On area A2 this function is based on the use of SART transponders
On all areas this function is based on the use of S band radars
On area A3 and A4 this function is based on the use of SARSAT COSPAS Epirb
On area A1 this function is based on the use of SART transponders
By the term “Stand by” the operator of a coast-station means that one should:
Don't know
Wait until the coast-station calls again
Switch back to the calling channel
Give the position of the ship
When stripping a tank, if excessive air is allowed to be drawn into the suction line, which of the following may occur?
Control of the operation will be lost and the tank will rapidly empty.
The pump will "race" and there will be a loss of suction.
The cargo pump impeller will stop rotating.
The back pressure will increase.
COTP can request (OPA-90)
Maximum one drill a year
Maximum two drills a year
Unannounced drills at any time
Participation in all announced drills
What is the first sign and symptom of a Cardiac Infarction?
Skin may be red and loss of movements in the right arm may occur.
Possible frothing at the mouth.
Strong and painful pulse.
Sudden crushing, vice-like pain in the centre of the chest.
What is the most probable place that any oil will flow over the ship's side in case of an overflow during loading/discharging?
Near the sounding pipe of the tank being loaded/discharged
Near the hatch of the tank being loaded/discharged
Near the cargo manifold
Aft part of the tank-deck
What would be the preferred colour to use when maintaining the paint on shell, plating, structure and bottom/tanktopp in the engine room?
Dark brown/red colour to camuflage any minor leakages and oil spills.
The same colour as machinery and equipment.
Whatever paint is available.
White or light grey to ensure all minor spills and leakages are noticed and dealt with.
Give the meaning of the following symbol
Foam installation
Sprinkler installation
Powder installation
Portable foam installation
It is important that the brake holding capacity of a self stowing winch drum should not exceed the breaking strength of the wire or rope wound onto it. A certain percentage of extra strength is therefore recommended for the wire or rope over the brake holding capacity of the winch. So, for a winch of brake holding capacity of 60 Tons you would order a wire of breaking strength:
75 Tons.
61 Tons.
80 Tons.
100 Tons.
You are on a power-driven vessel underway in open water. This vessel is sighted on the port bow on a steady bearing. What kind of vessel is it and what will your action be?
This is a sailing vessel not making way through the water. There is no risk of collision and I will maintain my course and speed.
This is a vessel engaged in fishing. It is my responsibility to keep clear under rule 18 and I will alter course to starboard, sounding one short blast.
This is a sailing vessel underway. I am the stand-on vessel and will maintain my course and speed under rule 17.
This is a sailing vessel underway, seen head-on. It is my responsibility to keep clear under rule 18 and I will take appropriate avoiding action.
When will we notice the effect of shallow water?
When Under Keel clearance is 15% or less
When Under Keel Clearance is 75% or less
When Under Keel Clearance is 50% or less
When Under Keel Clearance is 10% or less
Is piracy an increasing or decreasing problem?
Piracy is not a probably
Piracy is decreasing
Piracy has remained constant for the last 50 years
Piracy is increasing
Within territorial waters the use of transmitters is prohibited. In general this does not apply for:
Inmarsat-C equipment
Don't know
MF-equipment
HF-equipment
The MF/HF-transceiver on board is tuned to the assigned frequency of a station. To make this connection the following mode is used:
H3E
Don't know
J3E
J2B
What mode must be used on the MF/HF transmission when making a radiotelephone call:
H3E
J3E
Don't know
F1B/J2B
Which of the following is the correct minimum carriage requirement for a ship of more than 300 gross tons and operating in area A4:
1VHF RT + DSC+ DSC watch receiver – 1 NAVTEX or 1 EGC receiver– 2 or 3 VHF portable – 1 EPIRB – 1 MF RT + DSC+ DSC watch receiver – 1 INMARSAT A,B or C and 1 HF RT + DSC+ DSC watch receiver
1VHF RT + DSC+ DSC watch receiver – 1 or 2 SART – 1 NAVTEX and/or 1 EGC receiver and/or 1 HF NBDP watch receiver – 2 or 3 VHF portable – 1 EPIRB – 1 MF RT + DSC+ DSC watch receiver – 1 HF RT + DSC+ DSC watch receiver
1VHF RT + DSC+ DSC watch receiver – 1 or 2 SART – 1 NAVTEX or 1 EGC receiver– 2 or 3 VHF portable – 1 EPIRB – 1 MF RT + DSC+ DSC watch receiver – 1 INMARSAT A,B or C
1or 2 SART – 1 NAVTEX and/or 1 EGC receiver and/or 1 HF NBDP watch receiver – 2 or 3 VHF portable – 1 1 HF RT + DSC+ DSC watch receiver
The minimum number of lifebuoys required on passenger ships depends on:
the length of the ship
the tonnage of the ship
the sea area in which the ship is allowed to sail
the number of persons on board
*Which among the following list is particularly required for a totally enclosed lifeboat ?
windows on both sides can be closed watertight and opened for ventilation
self-bailing arrangemens
automatic self-righting abilities when every persons are held in their place
handrails inside for persons moving to their seats.
Which item among those below is included in the normal equipment of every liferaft ?
one searchlight which can work continuously for not less than 3 hours
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
a food ration for each person
Which one of the listed requirements regarding hydrostatic release unit for float free arrangements for liferafts does not correspond to present regulations? Hydrostatic release units shall:
be constructed of compatible material to prevent malfunction
be permanently marked with type and serial number
be constructed as to prevent release by seas washing over the unit
be provided with a painter system with a breaking strength of not more than 2.2 kN
How many 'thermal protective aids' are required to be carried on passenger vessels with open lifeboats?
One for each person on board who is not provided with an immersion suit
Each lifeboat should carry the same number of thermal protective aids as the number of persons it is designed to carry
They are not required, providing the boat has a canvas canopy which can be rigged in cold weather
10 in each lifeboat
*Give the meaning of the following symbol
Indicates manual starting direction of the engine
Start engine
Reverse engine
Start water spray
*How much food per person is supplied on a liferaft marked SOLAS A PACK?
Not less than 5000 kJ
None
Not less than 10000 kJ
Not less than 20000 kJ
The Muster List shall show the duties assigned to members of the crew. Which of the following duties shall be included according to present regulations?
Preparation of immersion suits for passengers.
Manning of fire parties assigned to deal with fires.
Operation of the vessel's propulsion system.
Special duties assigned with respect to the use of pyrotechnics
The Training Manual shall contain instructions and information on the life-saving appliances and the best method of survival. The training manual shall contain detailed explanations of crew duties in relation to emergency situations. Which of the following tasks or duties shall be included in the manual according to present regulations?
The method and use of sea-anchors (drogues).
The use of oars and other propulsion equipment for survival crafts.
The use of on-board communication equipment.
Correct donning of fire protective clothing.
Injuries resulting from slips and falls constitute the largest percentage of accidents that occur in the catering department. What shall be done to reduce this high accident rate?
Do not wash off all rubbish to prevent persons slipping.
Install thermostats to avoid water from freezing to ice.
Keep the floors and decks free from fat and grease.
Ensure that slippery substances are not left where several persons are expected to be around.
Which one of the statements given in the options is correct in relation to the maintenance and adjustment of 4-stroke, medium speed diesel engines?
The piston ring groove clearances for the oil control ring are unimportant as this ring does not form part of the gas seal.
Liner wear of up to 3% of the bore size is generally acceptable for continued service.
Both the top and bottom shells of a bottom end bearing should be inspected as they can wear due to load reversal during the engine operating cycle.
Timing of inlet and exhaust valves can be correctly set by varying the tappet clearance.
In which cases shall side scuttles in passenger ships be so constructed that they cannot be opened without the consent of the master of the ship?
Where the sills of the side scuttles are below the margin line
Where the sills are mounted below the bulkhead deck
Where the sills of the side scuttles are less than 500 mm above the deepest load line
Where the height of the side scuttles go through more than two decks
While on boiler watch on an automatically controlled steam boiler the rating notices that the burner has failed to light following a drop in steam pressure. What action should be taken?
Shut the steam stop valve to stop the steam pressure falling further.
Stop the feed water pump immediately in case the boiler overfills.
Try and light the boiler burner manually.
Call the duty engineer immediately using the engineers call alarm.
When the temperature of lubricating oil is lowered, an increase will occur in the:
Concentration of contaminants.
Viscosity.
Pour point.
Flash point.
During the 5-yearly overhaul and operational test of a lifeboat on-load release gear, to what level should the gear be load tested?
0.8 times the total mass of the lifeboat when loaded with its full complement of persons, equipment and stores.
1.25 times the total mass of the lifeboat when loaded with its full complement of persons and equipment.
1.1 times the total mass of the lifeboat when loaded with its full complement of persons and equipment.
The equivalent to the total mass of the lifeboat when loaded with its full complement of persons and equipment.
Why did they order another tug?
Because the bow thrust was useless in the strong wind.
Because they wanted to make sure that the ship could be safely turned.
Because the mates always receive their instructions prior to berthing and they all felt that another tug was needed.
Because the ship was going to berth with port side to the terminal.
Your vessel is equipped with fixed rotating tank-cleaning machines in every tank. You have just finished cleaning, in preparation for loading a cargo which is water-sensitive. What should you do with the machines?
It is not necessary to do anything. The amount of moisture remaining in a tank-cleaning machine could not affect the quality of the cargo in any way.
Ensure they are thoroughly drained down and blown through, using de-humidified air or nitrogen as applicable.
The nozzles and drain holes should be plugged.
They should be removed from the tank.
The purpose of profiling is to?
Categorize people based on their nationality and ethnicity.
Make judgements about people based on heir appearance.
Identify different personality types.
Get beneath the outer shell of an individual to obtain a more complete picture.
This circuit consists of two resistances, R1 = 6 ohm and R2 = 12 ohm , connected in series. Calculate the equivalent resistance R(S) .
R(S) =18 ohm
R(S) =1,5 ohm
R(S) = 72 ohm
R(S) = 4 ohm
When there is a need to interupt current flow in a high voltage system it may be very difficult to quench the electrical arc which is generated at the circuit breaker contacts. Which of the following arcing media is commonly found in high voltage marine switchgear?
Vacuum
Air
Water
Oil
On a Container vessel, how should the first tier of under-deck containers be loaded onto a non cellular vessel?
Onto dunnage laid athwartships over the tank top
Directly onto the tank top
Onto dunnage laid directly under the containers' bottom rails
Onto dunnage laid fore and aft over the tank top
A pump cover is sealed using a paper gasket which is damaged during overhaul. There are no spare gaskets available. How should the casing be sealed when reassembling the pump?
Re-use the old gasket.
Run a bead of silicon around the outside of the joint after fitting the cover.
Put a thick layer of jointing compound on the face of the cover and tighten the cover until the compound squeezes out.
Make a new gasket from old chart paper or other similar material of the same thickness as the original gasket.
The type of pump used for delivering the oily-water mixture to an oily-water separator governs considerably the degree of contamination in the effluent. What type of pump would be best suited not to churn the supply and produce small oil droplets (less than 200µm) dispersed throughout the water?
Screw.
Mixed flow (part axial, part centrifugal).
Axial Flow.
Centrifugal.
What is the purpose of a dovetail foundation?
To secure double stacking cones
To lock adjacent containers together
To secure base twistlocks
To secure a single stacking cone
Why should a container with a damaged corner post not be loaded?
Because during discharge the ship could be held responsible for the damage
Because its strength is weakened
Because it will not fit properly into a container stack
Because the cargo inside might be damaged
Who is responsible for the regular security inspections of the ship?
The Company Security Officer
The Classification Society.
The Ship Security Officer
The Port Facility Security Officer
This circuit is widely used for rectification of AC into DC. Which of the diagrams is correct for the out- put voltage when the input voltage is sine-shaped as shown?
Figure 3
Figure 1
Figure 2
Figure 4
According to the ISGOTT definition, what is "volatility"?
The tendency of a crude oil or petroleum product to produce gas.
The ability of a crude oil or petroleum product to resist ignition.
The measure of a crudre oil or petroleum product's vapour pressure.
The tendency of a crude oil or petroleum product to ignite.
Which of the suggested navigational systems is a "Hyperbolic" navigational system and has hyperbolae as position lines?
Loran C
Radio Direction Finder
All of the suggested systems
GPS
On a Container vessel, what problem is associated with the use of twistlocks?
Freedom to slide when the vessel is rolling an pitching
Susceptibility to wear and tear
Fracturing during rolling and pitching in high seas
Left hand and right hand types exist, causing uncertainty whether a fitting is locked or open
Signals used by aircraft engaged in search and rescue operations to direct ships towards an aircraft, ship or person in distress. What is the meaning of the signal?
Medical assistance required
Landing is highly dangerous
The assistance of the vessel is no longer required
The aircraft is directing a vessel towards an aircraft or vessel in distress
What is the result of a large metacentric height?
The center of gravity will move upwards.
The ship will have a long roll period.
Bending moment will increase.
The ship will roll violently.
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.
How will continuous low load operation influence the time between overhauls, tbo, for the cylinder covers and associated valves of a 4-stroke diesel engine?
Reduce the time between overhauls due to increased fouling.
Increase the time between overhauls since fuel injectors work better at low load so combustion will be improved and the maintenance will be reduced.
Increase the time between overhauls since the engine is not working as hard.
No influence at all, the required overhauls are unaffected by operating load.
With reference to non-VIT diesel engine high pressure fuel pumps that have helix control, how is the timing of fuel injection normally adjusted?
By raising or lowering the pump plunger relative to the pump barrel.
By rotating the pump plunger relative to the pump barrel.
By changing the governor output signal.
By changing the opening pressure setting for the fuel injection valves.
When is track line search normally used?
When the position of the search object is accurate
When a vessel or aircraft has disappeared without a trace
When the position of the search object is not accurate
When a direct communication between the search object and the search facility is available
On the figure 4 possible definitions of the term "ASTERN" are shown. Which one is the correct one?
Astern is defined as B on the figure
Astern is defined as D on the figure
Astern is defined as C on the figure
Astern is defined as A on the figure
What is the definition of "pour point"?
The lowest temperature at which petroleum oil will remain fluid.
The unrestricted fall of liquid into a tank.
The time it takes for tank contents to stop moving.
The highest temperature at which a petroleum oil will remain fluid.
The maximum current that a 15 Volt, 3 Watt Zenerdiode can handle without damage is
0.5 A
0.45 A
20 A
0.2 A
Give the meaning of this symbol:
lifebuoy with light and line throwing appliance
lifebuoy with light and smoke
lifebuoy with light and hand flare
lifebuoy with automatic sound signal
IMO publishes the IGC Code relating to LPG and other liquefied gas carriers. What does the IGC code primarily deal with?
Specifically, how gas carriers for hydrocarbon gases are designed
Specifically, the safety of personnel sailing on gas carriers.
How all liquefied gas carriers are constructed and equipped.
The most efficient way to operate any gas carrier.
The range of a transducer is 0-200 bar. The standard output signal is 4-20 mA. What is the output signal when the process value is 100 bar.
24 mA
4 mA
10 mA
12 mA
A non-reversing medium speed diesel engine is used to drive a controllable pitch propeller through a pneumatic clutch and reduction gearbox. The engine has been tested and brought up to operating temperatures on engine control. Which of the options given would be the preferred status of the engine and associated equipment when it is handed over to bridge control?
Engine stopped with clutch disengaged and propeller in zero thrust position.
Engine running, clutch disengaged, propeller at zero thrust.
Engine running with clutch engaged and propeller in ahead position.
Engine stopped with clutch disengaged and propeller at zero thrust.
"Part way through a profiling interview with a supplier, the package the individual is carrying arouses your suspicion. What do you do?"
Confront the individual and demand that he open the package.
Discreetly inform someone of your suspicions so he or she can get assistance.
Call for help on the radio.
Take the package and open it.
How do container ships without hatch covers comply with the International Convention on Load line Rules?
An International Load Line Exemption certificate will be issued in accordance to Article 6.
A special movable deck is provided to ensure watertight integrity
There will always be hatch covers on ships to comply with the International Load line Rules
This type of container ship does not need to comply with the Load line Rules
A walk-in refrigerator has been out of use for several weeks and needs cleaning. It has been closed for a long time because there is a suspicion that there may be a small gas leak from the cooling system. What should you do?
Hold your breath as you enter, locate the gas leak and stick a bit of tape over it.
Seek advice from ther ship's safety officer who will perform a risk assessment and advise on any precautions necessary.
Nothing special - it's only a refrigerator and everything will be OK.
Get someone to come inside the refrigerator with you.
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
Cargo density
What is the delivery pressure of a centrifugal pump dependent on?
The liquid-s density and delivery head.
The pipe resistance.
The net delivery heads.
The NPSH (Net positive suction head).
What would be the effect of a large GM on a ro-ro vessel?
The possibility of assuming an angle of loll
A stiff ship with a quick roll period
An adverse affect on seaworthiness
The possibility of capsizing
By what formula is the displacement calculated? W = Displacement; L = length; B = Breadth; D = depth of vessel; Cb = Block Coefficient; Cw = Coefficient of waterplane; RD = relative density;
W = L x B x d x Cb
W = L x B x d x Cw
W = L x B x d x RD
W = L x B x d x RD / Cb
xxz
a
c
b
d
Where would you find the document relating to the "Condition of Freeboard Assignment" onboard?
With the Loadline Certificate.
With the Structural Survey File.
With the Classification Records.
With the Safety Construction Certificate.
A new joint is needed for a steam condensate drain line. What is the most suitable jointing material to use?
Cork jointing
Cotton reinforced rubber insertion.
Plain fibre jointing
Wire reinforced fibre jointing.
The thermal conductance capability is expressed by a material's thermal conductance number and states the heat quantity. What is the denomination for heat quantity?
Enthalpy.
Joule.
Calorific value.
Watts.
A thermistor which provides feedback for a thermal control system is suspected to have failed. Assuming there is no available replacement, which of the following methods may be used to prove it has failed?
Connect a mV source in parallel with the thermocouple connections.
Connect a mA source in parallel with the thermocouple connections.
Disconnect the thermocouple lead from the conttroller and replace with a mA source.
Disconnect the thermocouple lead from the controller and replace with a mV source.
Is it permitted to load fully refrigerated propane directly onto a fully pressurised LPG carrier without additional conditioning of the cargo or cargo spaces?
Only if the loading rate is kept below 100m3/h.
Only if the cargo containment system is designed for temperatures of minus 48 degrees C or less.
Fully refrigerated propane can be loaded directly onto this type of vessel under any circumstances
Only if the vessel is equipped with cargo cooling plant
What is the name by which the regulations which prevent and control pollution from ships are known?
The International Shipping Pollution Laws.
SOLAS
MARPOL
The ISP Code.
On a RoRo vessel, what must be ensured so that vehicles are not damaged on the loading ramp?
The ramp angle must not exceed its safe working limit
The ramp surface must be free of oil
Safety signs must be posted at the ramp
One man must always stand-by the ramp
What is the approximate API gravity of Arabian Light Crude?
30 degrees.
40 degrees.
27 degrees.
33 degrees.
When loading coal on a Bulk Carrier, what should the ship be provided with?
Ramneck tape
Means for drawing cargo samples
A glass hydrometer
Means for measuring cargo temperatures
How will you find the Tipping Moment of a cargo item?
Transverse accelerations/10 x weight of cargo item x height of its centre of gravity above its base
Transverse accelerations/10 x weight of cargo item x height of its centre of gravity above the keel
Transverse accelerations/7 x weight of cargo item x height of its centre of gravity above its base
Transverse accelerations/7 x vessel's natural roll period
On a RoRo vessel, what must be ensured onboard the vessel prior to commencing cargo?
That all cargo is ready for loading
That the vessel has been cleared by immigration
Cargo hold ventilation systems are operational
What would you do before giving a boiler a “bottom blow”
drop the water level a couple of inches below normal
increase the oil pressure
raise the water level a couple of inches above normal
increase the oil temperature
Where should water level detectors be fitted on bulk carriers?
In the ballast hold
In each cargo hold
In alternate cargo holds
In the foremost cargo hold
Which of the following pump types is not considered to be self priming?
Gear pump.
Screw pump.
Centrifugal pump.
Reciprocating pump.
Chemical tankers of 20,000 tonnes DWT or above, with a keel laid on or after 1st July 1986, when carrying flammable products with a flashpoint not exceeding 60 degrees Celsius, such as those listed in chapters 17 and 18 of the International Bulk Chemical Code, are exempt from the requirement to be fitted with and use an inert gas plant provided certain conditions are met. Which of the following is a summary of those conditions?
The cargo tank does not exceed 1250 cubic metres capacity / each tank washing machine nozzle does not exceed 12.5 cubic metres per hour delivery rate / the total wash water input to the tank from all tank washing machines does not exceed 90 cubic metres per hour.
The cargo tank does not exceed 3000 cubic metres capacity / each tank washing machine nozzle does not exceed 17.5 cubic metres per hour delivery rate / the total wash water input to the tank from all tank washing machines does not exceed 110 cubic metres per hour.
The cargo tank is greater than 3000 cubic metres capacity / each tank washing machine nozzle is capable of delivering a minimum of 17.5 cubic metres per hour / the total wash water input to the tank from all tank washing machines must be at least 110 cubic metres per hour.
The cargo tank is greater than 1250 cubic metres capacity / the number of tank washing machines in use at any one time must be such that no more than 17.5 cubic metres per hour is delivered / the minimum quantity of wash water delivered in the washing operation must be greater than 110 cubic metres.
A delta connected 3-phase A.C. induction motor is running normally at its rated current of 150 A when a single phasing fault (open circuit) occurs in one line. The likely outcome will be:
Line currents: 0 A, 180 A, 180 A. Trip condition: trip on overload.
Line currents: 150 A,150 A,150 A. Trip condition: fuses blow on short circuit.
Line currents: 75 A, 75 A, 75 A. Trip condition: no trip but speed falls.
Line currents: 0 A, 150 A, 300 A. Trip condition: trip on overload.
How is cargo in a self-unloading bulk carrier fed to the vessel’s conveyor belts during discharge?
Via remote-controlled hopper gates at the bottom of each hold
Via hydraulically-operated hopper gates at the bottom of each hold
By gravity through mechanical hopper gates at the bottom of each hold
Via mechanically-operated hopper gates at the bottom of each hold
When must side scuttles in passenger ships where the sills are below the margin line be kept closed and watertight?
When unwatched
Always during night-time
When not necessary to be kept open due to work being carried out aboard
During navigation between ports
In most ports, tankers are required to discharge in enclosed atmosphere.What is the required capacity of the I.G.Blowers in relation to cargo pumps ?
50 pct?
225 pct?
125 pct?
100 pct.?
Ce test en ligne se compose de 90 questions aléatoires issues des tests CES 5.1 sur un sujet de votre choix.