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Maison Tests en ligne CES Tous types de navires MASTER / Ch-Officer Test Online and Answers for Marine Engineering and Navigation (CES v6.0)
Tests en ligne : Test Online and Answers for Marine Engineering and Navigation (CES v6.0)
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Le test comprend 80 questions aléatoires.
Total de questions sur ce sujet : 135
Total de questions sur ce sujet : 135
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Why is the maximum pressure in a plate heat exchanger usually limited to about 10 bar?
Pump capacity.
All the above alternatives.
Possibility of rupturing the plates.
Difficult to seal plates above this pressure.
You want to turn your vessel in a narrow canal by use of two tugs with same power. The wind varies in the range moderate/strong. Where/how will the tugs be used?
Pulling, made fast in the vessel.
One tug pushing, one tug pulling.
Pushing, made fast in the vessel.
What is initial stability?
It is the stability status of the ship, when first delivered to owners from the shipyard.
It is the vessel’s GM, after completion of loading.
It is the stability of the vessel in her initial position, and is expressed by metacentric height.
It is the vessel’s GM, before commencement of loading.
You are underway on a power driven vessel in open water, when you see another power driven vessel approximately five miles straight ahead on an opposite course. What action do you take?
Try and call him on the VHF to decide on what action to take.
Make a bold alternation to starboard and pass on his port side.
Make a bold alteration to port and pass on his starboard side.
Stand on with caution as he will alter course.
The diagram shows loadline marks. How is the distance between S and T calculated?
One sixtieth of the summer draft.
One forty eighth of the summer draft.
Nine tenths of the FWA.
Four fifths of the FWA.
Water hammer is a short lasting pressure peak traveling along the pipe. How can it be avoided in a cooling water system?
Operate valves quickly.
Operate valves gradually.
Start pump with closed valves.
Start the system with open valves and empty pipes.
How is shallow water effect felt in a vessel?
The vessel has a tendency to turn to port (right turning propeller).
The vessel has a tendency to turn to starboard (left turning propeller).
The vessel becomes sluggish in responding to the rudder.
The vessel responds very quickly to the rudder.
The watertight integrity of a vessel must be intact, when:
In open waters only.
Can be relaxed in inshore waters.
Can be relaxed during spells of fine weather.
When manoeuvring.
Which of the following is a rotary compressor?
Diesel engine charge air compressor.
Emergency air compressor.
Starting air compressor.
Control air compressor.
What is prismatic co-efficient?
cm / cb.
Volume of displacement / (midship area × LBP). Also = cb / cm.
A co-efficient for a box shaped vessel only.
The same as block co-efficient.
What is the main advantage of plate heat exchangers?
Cheaper to install.
Easier to clean.
More efficient and take up less space.
Requires less maintenance.
If mouth-to-mouth (M-T-M) ventilation by itself is unsuccessful and the casualty’s heart stops or has stopped beating, you must perform external chest compression (ECC) in conjunction with M-T-M. What is the complete rate when performing ECC?
Complete 25 compressions at the rate of 75 compressions per minute.
Complete 10 compressions at the rate of 40 compressions per minute.
Complete 15 compressions at the rate of 80 compressions per minute.
Complete 20 compressions at the rate of 60 compressions per minute.
The two main types of refrigeration system evaporators are called?
Finned and tube.
Wet and dry.
Short and extended.
Dry and flooded.
The Disc type oil separator can usually separate water from oil when processing oils between which density ranges?
0,87 to 0,95.
0,845 to 0,965.
0,78 to 0,98.
0,84 to 0,945.
When you join a new ship, how are you informed about safety rules, alarm instructions and your own duties in case of an emergency?
By muster lists exhibited in conspicuous places.
By oral instructions by the captain.
By folder distributed to each crew member.
By alarm instructions in all crew cabins.
The condenser in a steam plant is where:
Steam is turned back into water.
Water is turned into steam.
Electricity is supplied.
Low pressure steam is produced.
What is the result of a high metacentric height?
The vessel will roll violently.
The vessel will roll slowly or be unstable.
The vessel’s tween deck height is too high.
The vessel will have a great bending moment.
The indications of a faulty refrigeration compressor valve are:
Continuous running.
Gradual or sudden decrease in capacity.
Low head pressure, high suction pressure.
Any of the alternatives.
Name the two (2) different lubrication oil circuits of a steam turbine:
The thrust bearing and shaft circuit/the front and governor circuit.
The reduction gear oil/the turbine shaft bearing oil.
The bearing and gear oil circuit/the governor oil circuit.
The front bearing circuit/the rear bearing circuit.
How can you minimize the squat effect?
Maintain your course and speed.
Increase speed if the ship is not already on full ahead.
Do a zig-zag manoeuvre to reduce speed.
Decrease the speed as much as practicable.
How do you consider the indicated speed for berthing?
To be sufficient.
It is up to the pilot to decide.
Too fast.
Too slow.
How far from the coast is it permitted to use low-pressure evaporation to produce drinking water?
5 miles.
12 miles.
20 miles.
30 miles.
Which of the equipment listed is not included in the fireman’s personal equipment? (SOLAS II-2/17.1.1).
Protective clothing.
Leather safety boots and gloves.
An axe.
An electric safety lamp.
A water content greater than 2 % is detected in a lubricating oil system. What is the best action to do?
Segregate the oil in a separate tank for continuous purifying.
Boil out the water by increasing the temperature.
Continuous purifying the system with the oil pumps running.
It is no danger, until the water level reach 6-8 %.
How will the ship behave if you have a black out in the situation sketched below?
The wind will not affect your ship whatsoever.
She will continue on course and the speed will slowly drop.
She will turn to starboard and the speed will slowly drop.
She will turn to port and the speed will drop gradually.
What effects does freeboard have on a vessel’s dynamical stability?
As freeboard increases, the range of stability also increases, and this in turn leads to a greater dynamical stability.
If freeboard is greater, then dynamical stability is correspondingly reduced.
It does not have any effect on dynamical stability.
Freeboard and dynamical stability are not related in any way.
Regarding feed water, which of the following statements is NOT true?
Feed water in HP boilers is normally pumped with a single stage centrifugal pump.
It is fresh water.
It is turned into steam in the boiler.
Steam turns to feed water in the condenser.
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 be used as well.
Make the tug fast aft for pulling.
Make the tug fast on starboard shoulder to push.
Make the tug fast in centre now fairlead for pulling.
Make the tug fast on port shoulder to pull.
What part in this diagram is the low pressure turbine?
2.
3.
1.
4.
What do the intersecting horizontal lines signify in the diagram?
The change in the centre of floatation, after trimming.
They show the actual angle of trim.
They only serve as a base for the two vertical lines.
The change of draft after trimming.
In a distress situation, how many times or for how long should the emergency alarm signal be sounded?
Until all crew members and passengers have reported to their respect muster stations.
3 minutes.
Until the signal “risk is over” or the order abandon ship is given.
3 times.
What are “hydrostatic curves” used for in ship calculations?
For hydrostatic pressures on bulkheads.
Obtaining the shape of the body sections.
For pressure at various depths in oil fuel bunkers.
Mainly for trim calculations for predicting end draughts.
What is the general emergency alarm signal to be sounded by the ship’s whistle and alarm bells in case of an emergency situation?
Seven short blasts followed by one prolonged blast.
Series of long blasts.
Only one long blast.
Series of short blasts.
What kind of steam is feeding the astern turbine fitted on the same rotor as the LP turbine?
Reduced superheated steam via a pressure reducer.
Regenerated steam via resuperheater.
Steam from the main steam manifold via manoeuvring stand.
Exhaust steam from the high pressure turbine.
What is the purpose of the corrugations on a plate heat exchanger?
All of the above.
To increase the surface area.
To increase turbulence in the liquid.
Stiffening on the thin metal sheet.
Which one of the listed fire extinguishing medium is most effective against an open oil fire?
Powder.
Gas.
Water.
Foam.
What can be used to reduce the effect of the state of sea-waves?
Fuel oil.
Foam.
Crude oil.
Vegetable/fish oil.
In the shown situation, the bow of your ship is pushed away from the bank. How can you handle this?
Give hard port rudder to get the ship back in the middle of the channel.
Give starboard rudder in order to balance the force of the bank effect and rudder effect.
Do nothing as the ship will handle itself.
Put your engine full astern to stop your ship.
In a refrigeration system, a fluid that serves only as a heat carrier is called the:
Vaporizing refrigerant.
Condensing refrigerant.
Primary refrigerant.
Secondary refrigerant.
The ship’s training manual must contain instructions and information on the life saving appliances carried onboard. Which of these duties must be included?
Correct use of oars and sails for survival craft.
Correct donning of protective clothing.
Correct method of revival of casualties.
Correct launching, boarding and clearing of survival craft and rescue craft.
What is the minimum allowable value for GZ?
0,15 m.
0,2 m.
0,35 m.
0,42 m.
Where can you find out if you belong to the forward mooring gang or the aft mooring gang?
Posted on the notice board onboard.
Alarm instruction onboard.
Being distributed for each port.
Deck crew forward and engine crew aft.
What is the most dangerous overtaking situation shown on the sketches?
A large vessel overtaking a small vessel with big difference in speed between the two vessels.
A small vessel overtaking a large vessel with a little difference in speed between the two vessels.
A large vessel overtaking a small vessel with a little difference in speed between the two vessels.
A small vessel overtaking a large vessel with big difference in speed between the two vessels.
How often shall each member of the crew participate in an abandon ship drill?
Once every 6 months.
Once every week.
Once every month.
Once a year.
Superheated steam is steam:
That is mixed with water vapour.
That can be used for heating the accommodation.
That has been condensed.
That has been heated until it is “dry”.
In a two stage compressor, you will find pistons with different diameters (one is bigger than the other). Which one of the following statement is correct?
A big piston will deliver dryer air into stage one.
The biggest diameter piston is the stage two piston.
The smallest diameter piston is the stage two piston.
A big piston will give less oil content in the air.
Boiler feed water is water:
Used to cool steam back into water.
Taken from the condenser and fed back to the boiler.
Used to cool steam turbines.
Mixed with fuel oil and burnt as waste oil.
How is bank effect felt in a vessel?
The vessel’s stern is pushed away from the nearest bank.
The vessel’s bow is pushed away from the nearest bank.
The whole vessel is drawn in parallel to the nearest bank.
The whole vessel is pushed away parallel to the nearest bank.
What is the purpose of the sea water pump item No 13?
To cool the evaporator.
To drive the air ejector of the evaporator.
To supply sea water to the condenser.
To supply water to be evaporated.
The ship’s training manual must contain instructions and information on the life-saving appliances carried onboard. Which of these duties must be included?
Correct donning of life jackets.
Correct use of oars and sails for survival craft.
Correct donning of protective clothing.
Correct use of communication equipment.
What are “cross curves” of stability used for onboard a ship?
Giving the capacity of various holds or tanks.
Similar to a set of Bonjean curves.
Obtaining statical stability curves at known displacements.
Showing tank calibration values.
Which way does the steam pass through in the system?
From the low pressure turbine to the high pressure turbine.
From the supply valve to the high pressure turbine.
From the high pressure turbine to the low pressure turbine.
From the condenser to the low pressure turbine.
What is part number 1 called?
The drainage tank.
The service tank.
The setting tank.
The expansion tank.
What is the centre of pressure?
It is the point where the total thrust of pressure could be considered to act.
It is the pressure at the centre of flotation.
It is the pressure in the centre of a specific tank.
It is the part that is least likely to give way to external pressure.
Which of the following statements regarding main boilers is NOT true?
At least two safety valves will be fitted.
The feed water need not be very pure.
The burners could be at the top firing down.
The superheated steam pressure could be as much as 60 bar.
What is the reason for the effect we call squat?
The bow and stern wave make the ship sink lower in the water.
Increased effect of gravity due to closeness of the sea bed.
Increased velocity and decreased water pressure around the ship’s hull.
Decreased velocity and increased water pressure around the ship’s hull.
What does permeability mean?
To make a compartment water tight.
The process of making a compartment non-porus.
The relationship between the volume of a compartment and the volume available for water if bilged.
The flooding of the engine room compartment.
The vessel will anchor with pilot onboard. You are the duty officer on the bridge. What is your main duty?
Check the position only.
No duty when pilot is onboard.
Follow the master’s order.
Follow pilots order.
To get the best possible efficiency from refrigerator evaporators, the superheat should be regulated to:
5-10 °C.
0-1 °C.
40-50 °C.
25-30 °C.
Which part in this diagram is the high pressure turbine?
1.
6.
4.
2.
What liquid is present in the collecting point at the bottom of the evaporator?
Brine.
Freshwater.
Ejector water.
Sea water.
After obtaining permission from the duty deck officer, under what conditions would the process of soot blowing the boiler tubes be most beneficial?
When the boiler is firing on high rate.
When the boiler is standing idle.
When the boiler is firing on medium rate.
When the boiler is firing on low rate.
How would you increase the KG of a ship, loaded with a timber cargo, that has become unstable?
By completely emptying all partly filled double bottom tanks.
By filling all wing ballast tanks.
By filing the small divided double bottom tanks on the lower side, while jettisoning the deck cargo from the higher side.
By jettisoning the entire deck cargo of timber.
Self-igniting lights on lifebuoys must either burn continuously or flash at a specified rate for a period of at least:
2 hours.
30 minutes.
1 hour.
90 minutes.
Turbo alternators perform which of the following tasks?
Supplying electricity on a motorship.
Supplying electricity on steamships when the main boiler is shut down.
Supplying electricity on steamships when the main boiler is operating.
Supplying electricity from diesel engines.
What formula do you use to determine the GM from an inclining experiment?
GM = KM by d by 1/2 length of plumbline divided by W by length of plumbline.
There is no formula. You simply measure the deflection of the plumbline with a tape measure.
GM = w by distance by length of plumbline divided by W by deflection of the plumbline.
GM = w by length of plumbline divided by W by deflection of the plumbline.
What shall you do if you see a person falling into the sea?
Put on a lifejacket.
Launch a lifeboat.
Throw a lifebuoy overboard and report to the bridge immediately.
Run aft.
How do you ensure reliable results from an inclining experiment?
No specific preparations are necessary and it can be done even in very windy conditions.
Perform test in calm conditions, with slack moorings, with minimum number of personnel and minimise free surface effects of liquids.
Modern high pressure boilers produce which of the following?
Fresh water for drinking.
Superheated steam.
Feed water.
Saturated steam.
What is the absolutely main purpose of fighting a fire onboard?
Try to put out the fire.
To put out the fire.
Rescuing of life.
To limit the fire.
What is hypothermia and how is it cured?
Body temperature below 23 °C/Heat the body.
Heavy coughing/medication.
Body temperature below 39 °C/Heat the body.
Body temperature below 35 °C/Heat the body.
On the air compressor crankcase, there is a small valve that let’s off pressure. What should be done if oil is present with air?
Block off the valve.
Check the clearance in the bearing.
Overhaul the compressor unit.
Lower the sump oil level.
Which alarm and shut-down device is fitted on the thrust bearing assembly?
The cooling water alarm.
The axial clearance alarm.
The steam pressure reducing alarm.
The low lub oil flow alarm.
Which of these requirements regarding the launching and recovery arrangements for rescue boats corresponds to the SOLAS regulations?
The release mechanism shall be of an automatic type approved by the flag state administration.
Launching shall be possible with a headway speed of up to 5 knots in heavy weather.
Rapid recovery shall be possible with the boat’s full complement of persons and equipment.
What is the reason for too rising cooling water temperature at outlet of individual cylinders?
Compression pressure too low.
Cooling water spaces insufficiently vented.
Overload of the engine.
Fuel pressure of fuel booster pump too high.
What is the purpose of performing an inclining experiment or stability test?
To determine the maximum angle of heel, before a ship will capsize.
It is done to find out the GM of a vessel, place the ship’s lightweight and VCG and LCG at this lightweight.
There is no need for such an experiment, because the information it gives may be obtained in various other easy ways.
To test the safe working load of a derrick or crane.
A burn may occur when electricity of high current and voltage passes through the body. Most damage occurs at the points of entry and exit of electricity. What is the treatment for electrical burns?
Apply lotion and ointment to injured area and secure with a bandage.
Remove loose skin and apply oinment. Don’t secure with bandage.
Break blisters and secure with bandages.
Place sterile dressing over the burn and secure with a bandage.
What is the minimum allowable value for GM?
0,15 m.
0,25 m.
0,45 m.
0,35 m.
Does liquid turbulence improve the efficiency of a plate heat exchanger?
Makes no difference.
Turbulence is not possible in a plate heat exchanger.
No.
Yes.
Your ship is going astern right-handed propeller as sketched below. How is the ship most likely to react?
The stern will fall off to starboard.
The ship will go straight astern.
The stern will back into the wind.
The bow will go to port.
The current test includes Seagull CES questions on the topic of «Engineering and Navigation». These questions are intended to assess the competence of specialists in preventing accidents related to transport safety and can also be used for self-assessment.
- Version: 6.0.
- Test type: Detailed Test.
- Function area: Engine.
- Detailed subject: Emergency Equipment and Procedures (Engineering and Navigation), Auxillary Machinery (Engineering), Trim, Stability and Stress ( Navigation), Survival Craft, Rescue Craft (Engineering and Navigation), Main Propulsion, Turbine, Boilers (Engineering), Ship Manoeuvring, Handling (Navigation).
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19.03.2025
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