Welcome to the website where you can pass online the CES CBT CD-7055 test on the subject «TOTS 1C-Operation, Monitoring, Machinery». Practice like this will help you as a marine specialist improve your knowledge with the help of online studying and appraisal practice. CES based on practical information and marine specialists experience.
CES tests developed for evaluating seaman basic knowledge by Seagull Company (rebranded as «OTG»), is an evaluating online-tool, used for revealing any professional preparation needed in specific fields of knowledge, defined by STCW.
CES tests have proven themselves as good tools for the selection and recruitment process, as well as advancing the level of knowledge of the current officers and crew. Ocean Technologies Group use various subjects for question creation, which includes:
Crowd and Crisis Management;
Integrated Navigation System (INS);
Ballast water management;
Handling and Stowage;
Vessel operation management and safety;
Marine engineering;
Maintenance and repair, etc.
Current test contains Seagull CES questions on the subject «TOTS 1C-Operation, Monitoring, Machinery». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«TOTS 1C-Operation, Monitoring, Machinery» subject includes theoretical and practical information about advanced training for work on any type of vessel. It is a comprehensive training program designed to elevate the operational proficiency of machinery in the engine room. The course goes beyond basic knowledge, equipping participants with advanced understanding of engine systems and their complexities. Sailors gain in-depth knowledge of various engine types, including their operation, maintenance and troubleshooting. Practical exercises simulate real-world scenarios, allowing trainees to apply their theoretical knowledge in a safe and controlled environment. The curriculum emphasizes advanced troubleshooting techniques, including diagnostics and repair procedures for complex machinery. Participants learn to interpret complex engine room instrumentation and logs, enabling them to make informed decisions. The test covers advanced safety procedures, including emergency response protocols and the safe handling of hazardous materials. The course equips sailors with the skills to perform complex maintenance tasks, including engine component repair and overhaul. Participants develop a comprehensive understanding of engine room regulations and best practices, ensuring compliance with international standards. Such test is designed to prepare individuals for leadership roles in the engine room, fostering a culture of safety and efficiency.
On this site Crew Evaluation System Test on the subject «TOTS 1C-Operation, Monitoring, Machinery» contains 76 questions you need to answer with no possibility to go back to previous question. Therefore, we recommend carefully reading each question and making decision with no hurry. In case you have some difficulty answering, you have also possibility to request a hint.
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* Some questions may have more than 1 correct answer.
A general indication of good combustion in an operating engine is …
Clear exhaust gases.
Less fuel and lube oil consumption.
Less noise and less vibration.
Slightly sooty exhaust gases.
A heat exchanger where two liquids flow in opposite directions is called …
Horizontal flow.
Counter-flow.
Opposite flow.
Parallel flow.
A high vacuum reading on the suction side of a gear pump …
Is indicative of partially opened suction valves or blocked strainers.
Is indicative of damaged gears.
Means that the discharge valve is shut.
Shows normal condition.
A lub oil purifier fault alarm, if not attended to immediately …
May result in a breakdown.
May result in an overload condition.
May result in contamination of the oil.
May result in good lub oil discharging to the sludge tank.
A ship’s air conditioning system is normally designed to give …
Ten to twelve changes of air per hour.
Six to eight changes of air per hour.
Twelve to sixteen changes of air per hour.
Two to three changes of air per hour.
An electrical driven ballast pump will not start because one of the main fuses has blown. Which of the following would you check, prior to trying to restart the pump motor?
The control system fuses.
The electrical power supply.
The motor and pump rotation.
The insulation of the motor windings.
An incinerator is normally used …
To incinerate waste oil, sludge and other waste.
To burn galley waste.
To burn plastic materials.
To burn sewage.
An overcharge or excess refrigerant in the system will be seen as …
Frost formation.
High cooling effect.
High condenser pressure.
High lube oil pressure.
Any Oily Water Separation operation has to be recorded and noted in the Oily Record Book.
True.
False.
As the temperature of air is reduced, its capacity to carry water vapour …
Is reduced.
Is marginally increased.
Is rapidly increased.
Remains the same.
Cavitation is the result of …
A too high discharge pressure on the pump.
Impurities in the water impacting on the impeller.
Overloading of the impeller.
The formation and collapse of air bubbles.
Centrifugal pumps …
Are not self-priming.
Are effective for pumping high viscous fluid.
Are positive displacement pumps.
Are self priming.
Compressors must always be started in …
Auto mode.
Loaded condition.
Manually.
Unloaded condition.
Control air is normally supplied around …
1 bar.
7 bars.
30 bars.
40 bars.
During discharge, problems with the inert gas plant result in the production of clean inert gas being reduced by 50 %. What do you do?
Advise the Chief Officer so that he can reduce the discharge rate in line with the reduction of the gas supply.
Adjust the boiler controls to increase the fuel and reduce the air in an attempt to reduce the oxygen content of the gas.
Allow the discharge to continue as the oxygen content in the tanks may not rise significantly during the remaining discharge period.
Shut down the discharge until the inert gas system problem is resolved.
For any maintenance work, the sewage system should be considered as an enclosed space.
True.
False.
For better purification, the throughput of a purifier …
Has to be maintained at minimum.
Has no effect on purification.
Has to be maintained at maximum.
Should be changed depending upon fuel quality.
For the most efficient and practical separation of oil from water, what is required?
A three stage separation tank.
A two stage separation tank.
A very high temperature in the separation tank.
As long as possible dwell time in the separation tank.
How is the rudder travel stopped in the event of total telemotor failure?
It reaches the physical stop-limits of the steering gear.
No other means are provided.
The emergency diesel alternator will start and supply power.
The rudder cannot be stopped.
If one generator is on load and the other generator is to be taken on load (share), you need to …
Increase the speed of both generators.
Reduce the speed of both generators.
Start a third generator before load sharing.
Synchronise phase and frequency of the incoming generator.
If the auxiliary boiler feed water hotwell was found to be heavily contaminated with oil, what initial action would you take?
Overflow the hotwell until the water is clear then top scum the boiler.
Drain the hotwell and blow down the boiler, then refill with treated fresh water.
Drain the hotwell and refill with fresh water to the correct level.
Overflow the hotwell until clear water is seen in the sightglass.
If the safety valves fitted on an air reservoir can be isolated from the reservoir, then …
It can be used legally without any added safety measures.
The reservoir must be fitted with a fusible plug.
The compressor must be fitted with a fusible plug.
The safety valve must be fitted with a fusible plug.
In a boiler, the system is set so that when the boiler is switched on, the following sequence of operation takes place…
(1) heat up and circulate fuel; (2) purge the combustion chamber; (3) turn on the fuel and ignite the flame.
(1) heat and circulate the fuel(2) turn on the fuel and ignite the flame (3) purge the combustion chamber.
(1) purge the combustion chamber; (2) heat and circulate the fuel; (3) turn on the fuel and ignite the flame.
(1) purge the combustion chamber; (2) turn on the fuel and ignite the flame (3) heat and circulate the fuel.
In a cargo system fitted with a vertical submerged pump, the pumped fluid contained in the vertical column will fall down into the tank when the pump is stopped after discharge. The normal remedy for this is by …
Using the purge connection fitted to clear the discharge pipe.
Stripping.
The use of manually operated valves.
The use of non-return valves.
In a typical tubular heat exchanger, the expansion of the tubes are accommodated by …
Choosing the right material.
Leaving one end of the cooler free to move axially.
A floating header.
Using pre-expanded tubes.
In order to test a weld repair to a lubricating oil storage tank the tank is to be tested with compressed air to check for leakage. What is the maximum pressure that should be used?
0,02 Bar.
0,2 Bar.
1,0 Bar.
2,5 Bar.
In plate type coolers you would normally expect the plates to be made of …
Nickel brass.
Silver.
Stainless steel.
Titanium.
In ships other than those engaged in short voyages, the steering gear should be thoroughly checked and tested …
On standby.
When one hour’s notice is given.
Within 12 hours before departure.
Within 24 hours before departure.
In the event that the sludge generated on board exceeds the incinerator capacity the excess sludge should be …
Discharged only when vessel is 12 nautical miles or more from land.
Discharged via OWS before entering port.
Transferred to a shore facility.
Transferred to fuel oil bunker tank.
It is recommended that the Oil Content Monitor of an Oily Water Separator is calibrated at least …
Annually.
Once every five years.
Once every ten years.
Once weekly.
Moisture in a refrigeration system could lead to …
Excessive discharge pressure.
Ice formation and a drop in pressure on the evaporator side.
The dryer getting clogged.
The loss of refrigerant.
On a tanker with 3 centrifugal cargo pumps, but with discharge reduced to 2 pumps due to shore restrictions you note that the idle pump is running backwards. What would you suspect as being the main problem?
The idle cargo pump non-return valve is not closing properly.
The non-return valve on one of the running pumps is defective and causing it to drive the idle pump …
The Pumpman has not closed the idle pump suction and discharge valves.
The Pumpman has set the valve incorrectly allowing the running pumps to drive the idle pump.
On a tanker, when on voyage with a heated cargo, the hotwell is found to be overheating due to steam returning from the cargo heating coils. What should you do?
Check that the Cargo Officer has not opened up the heating coil valves too far.
Check the steam traps drains to see if the traps are functioning correctly.
Check the cargo heating log to see if the cargo tank temperatures are too high.
Check the heating coil steam trap drain filters to see if they are clean.
Plate type heat exchangers can effectively deal with …
High pressure fluids.
Large volumes.
Low pressure fluids.
Vapour and gases.
Sewage discharge regulation can be found in the …
MARPOL regulations.
Health & Safety regulations.
ISGOTT regulations.
SOLAS regulations.
The air bottle(s) drain should be regularly checked and drained …
Because it is part of the checklist.
Because it is recommended by the makers.
Or the valves will seize and cannot be operated.
To remove any water present.
The cause of an abnormally high condenser pressure within a refrigeration system would be …
A defective thermal expansion valve.
A low cooling water flow through the condenser.
An above normal level of refrigerant in the condenser.
Incondensable gases in the refrigerant.
The closed flashpoints of fuel for general use should not be less than …
60 degrees Celsius.
65 degrees Celsius.
70 degrees Celsius.
75 degrees Celsius.
The control of temperature in heat exchangers when the cooling medium is seawater is normally achieved by …
By-passing or limiting (controlling) the seawater flow.
By-passing a proportion or all of the hot fluid flow.
Recirculating seawater discharge back to suction.
Throttling the flow of hot liquid.
The easing gear fitted to boiler safety valves is there to …
Allow the valves to be opened to release pressure in the event of a boiler problem.
Allow testing of the valve travel during safety checks.
Allow testing to make sure that the valves are not stuck shut.
Allow the valve to be eased off the seat slightly when adjusting the relief pressure.
The exhaust temperature deviation between units should be maintained within …
0 %.
10 %.
40 %.
60 %.
The function of the inert gas scrubber is …
(1) to cool the gas; (2) to remove the sulphur dioxide; and (3) to remove the soot.
(1) to cool the gas; (2) to remove the soot.
(1) to cool the gas; (2) to remove the sulphur dioxide.
to remove toxic matter.
The inert gas blowers should automatically shut down in the event of …
A high motor load.
Deck seal failure.
High temperature.
High pressure.
The maximum permissible oxygen content of the inert gas going into the cargo tank should be …
5 % by volume.
6 % by volume.
8 % by volume.
9 % by volume.
The oil content of bilge water is normally reduced from 100 to 15 ppm and below by the use of …
Coalescent filters.
Centrifugal separation.
Chemical treatment.
Steam heating.
The water side of an intercooler is protected against overpressure by …
Bursting the disc on the cylinder jacket.
Pressure testing it with the required pressure.
The fusible plug on the cylinder jacket.
The relief valve on the outlet side.
To prevent damage of the compressor, the refrigerant return line …
Should be a mixture of gas and liquid.
Should be condensed to a liquid state.
Should not contain any liquid.
Should not go back to the compressor.
What are the three distinct sections of an inert gas system?
(1) production of the inert gas; (2) cleaning and cooling the gas; and (3) distribution of the gas.
(1) the boiler to produce the inert gas; (2) the scrubber to clean the gas; and (3) the deck seal.
(1) the boiler; (2) the inert gas generator; and (3) the scrubber.
(1) the inert gas fan; (2) the deck seal; and (3) the pressure vacuum valves.
What do you predict would be the cause, if all the auxiliary diesel engines/generators, when running in parallel operation, started shedding load and hunting?
It could be caused by a defective droop setting on one of the automatic voltage regulators.
It could be caused by a faulty governor speed adjustment motor on one auxiliary engine.
It could be caused by a loss of oil from the governor control circuit.
It could be caused by a reduction in the flow of fuel through the main filters.
What is considered to be the main value of using ammonia as a refrigerant gas?
It is non-corrosive and non-irritant.
It doesn’t deplete the ozone layer.
It is non-toxic and non-flammable.
It is readily available worldwide.
What is meant by hunting in a control system?
The system being controlled does not settle on the set point.
The system being controlled does not reach the set point and remains below the set point.
The system being controlled overshoots the set point and remains above the set point.
The system being controlled reaches the set point but then falls back and remains offset.
What is meant by the term «surge» in relation to the Main Engine turbo charger?
It is a constant loud whistling noise.
It is a stalling of the airflow across the compressor wheel.
It is a high frequency vibration of the turbo charger rotor.
It is a rapid increase in pressure and air flow at high velocity from the diffuser to the scavenge trunk.
What is the cause if, on a two stage main air compressor the discharge pressure is low and the 1st stage discharge temperature is higher than normal?
The 1st stage discharge valve is defective.
The 2nd stage suction valve is defective.
The 2nd stage discharge valve is defective.
The 2nd stage piston rings are damaged.
What is the correct sequence of events that take place in an engine cycle?
What is the discharge regulation if the sewage is not comminuted or disinfected?
The ship should be on voyage and more than 12 nautical miles from the nearest land.
The ship should be more than 12 nautical miles from the nearest land.
The ship should be on voyage and four nautical miles from the nearest land.
The ship should not be in special areas and should be proceeding at not less than three knots.
What is the first action you should take when there is no water in the boiler gauge glasses?
Blow down the gauge glass locally and check the water level.
Increase the feed water supply so that the boiler doesn’t run dry.
Shut the fuel off from the boiler.
Reduce the load on the boiler.
What is the most common cause of the lowering in performance of heat exchangers?
An air lock.
Fouling of the heat transfer surface.
Low water flow.
The division plate joint failure.
What is the primary function of the deck seal?
To prevent the backflow of cargo tank gases, even when the inert gas plant is shut down.
To isolate the cargo tanks from the pump room.
To prevent cargo and toxic gas from entering into the engine room while the inert gas generator is in operation.
To provide a non-return seal on gases from the pump room to the engine room.
What is the purpose of a refrigerant compressor shaft seal?
To lock the shaft when not in operation.
To prevent a crankcase explosion.
To prevent leakage of oil and refrigerant from the crankcase.
To prevent any moisture or air from entering into the compressor.
What is the purpose of boiler water treatment?
To prevent corrosion, scale and increase efficiency.
To keep the water clean.
To maintain the correct water temperature.
To reduce water consumption.
What would cause a medium speed main engine exhaust gas temperature to be higher and the scavenge air pressure to be lower than normal, at a fixed load?
A partly blocked air cooler.
Incorrect fuel pump timing.
Incorrect valve timing.
Poor fuel injection.
What would cause the reduction in viscosity and flash point in the lubricating oil of an auxiliary engine operated on marine gas oil?
A build up of combustion products in the lubricating oil.
Fuel leakage into the crankcase.
The lubricating oil is at an operating temperature that is too high.
The wrong grade of lubricant being added to the crankcase.
What would you expect the main source of inert gas to be in a VLCC?
A gas turbine plant with an after burner.
An independent inert gas generator.
The main and auxiliary boiler.
The main engine exhaust.
What would you expect to cause smoky exhaust?
A sticking air valve.
A sticking fuel pump.
Sticky fuel injector.
Unsuitable cylinder lubricating oil.
When charging the refrigeration system with more refrigerant gas …
Always inform the Chief Engineer.
It is essential to weigh the refrigerant cylinder before and after the operation.
The main liquid valve should be closed and the gas introduced before the regulating valve.
You may choose whether to introduce the gas in the suction or discharge side.
When cooling a piston by system oil rather than water, the return temperature of the oil must be lower than it would be if using water because …
It avoids carbon deposits on metal surfaces.
It reduces the danger of fire.
It reduces the danger of leaks.
The specific heat capacity of water is less than oil.
When do you expect to have to change from low to high SW suction?
When the ship is entering a canal.
When the ship is entering an area where there will be restricted under keel clearance.
When the ship is in heavy weather.
When the ship loads a full cargo and is at maximum draught.
When the bunker fuel needs more purification, you should normally …
Change the gravity disc.
Increase the purifier throughput.
Operate two purifiers in series.
Operate two purifiers in parallel.
When using a cargo stripping eductor …
Always open the cargo line after creating enough vacuum.
Always open the cargo line first, and then start to build up a vacuum using seawater.
It is always recommended to use remote operated valves.
You do not have to wait for the vacuum to build up.
Which of the following arrangements is normally provided to facilitate complete tank draining on vessels fitted with centrifugal discharge pumps?
A gravity drain.
A vacuum stripping system.
A tank pressurisation system.
Centrifugal pumps connected in a series.
Which of the following is most likely to make the engine run unevenly?
The fuel system not being primed.
Sticky fuel pump control racks or linkage.
Unsuitable fuel.
Water in the fuel.
Which of the following proportions make up good quality inert gas, from an inert gas generator plant?
nitrogen 75 % by volume, carbon dioxide 13 %, oxygen 12 %, some water content.
nitrogen 77 % by volume, carbon dioxide 13 %, oxygen 4 %, no water content.
nitrogen 80 % by volume, carbon dioxide 13 %, oxygen 6 %, some water and sulphur content.
nitrogen 90 % by volume, carbon dioxide 1,8 %, oxygen 8 %, no water content.
Which of the following safety components would you expect to find in the air starting system of a main engine?
Flame traps.
Non-return automatic valves.
Relief valves.
All three devices.
Why is it necessary to preheat the engine before attempting to start it?
To reduce thermal stresses.
To ensure that it starts first time.
To reduce start failure.
To reduce the temperature gradient.
Why would you turn over a two stroke engine with starting air before commencing manoeuvring?
To clear the combustion space of any accumulation of liquid, and to test for potential leaks.
To check the propeller is clear of obstructions.
To prime the fuel to the engine.
To test the start air system.
You would expect a deck seal to be …
of wet or dry types.
gland packings.
mechanical type seals.
normal non-return valves.
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