Welcome to the website where you can pass online the CES CBT CD-7023 test on the subject «TOTS 1B-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 1B-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 1B-Operation, Monitoring, Machinery» subject includes theoretical and practical information about advanced training for work on any type of vessel. The course provides comprehensive knowledge on vessel operation, including navigation, maneuvering and safety protocols applicable to diverse vessel types. A significant portion of the training focuses on effective monitoring techniques, encompassing the interpretation of instrument readings, alarm systems and performance data analysis. The curriculum delves into the intricacies of various machinery found on vessels, covering their function, maintenance procedures and basic troubleshooting. The exercises within the program allow sailors to apply their theoretical knowledge in real-world scenarios, enhancing their hands-on skills. Emphasis is placed on understanding the operational principles of different engine types, propulsion systems and auxiliary equipment commonly used across various vessels. Participants learn to identify potential malfunctions and implement preventative measures to ensure the continuous and safe operation of onboard machinery. The course covers essential aspects of regulatory compliance and industry best practices related to machinery operation and maintenance on all types of ships. The ultimate goal of the test is to equip seamen with the advanced competencies necessary to safely and efficiently operate and maintain machinery on any type of vessel.
On this site Crew Evaluation System Test on the subject «TOTS 1B-Operation, Monitoring, Machinery» contains 70 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 heat exchanger where two liquids flow in opposite directions is called …
Counter-flow.
Horizontal 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 good lub oil discharging to the sludge tank.
May result in an overload condition.
May result in contamination of the oil.
A ship’s air conditioning system is normally designed to give …
Six to eight changes of air per hour.
Ten to twelve 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 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 marginally increased.
Is rapidly increased.
Is reduced.
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.
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.
During normal operation the main engine speed reduces and the engine stops. The engine can only be restarted at local emergency control station. The fuel lever is difficult to move. What do you suspect is the problem?
A fuel pump has seized.
The pneumatic stop solenoid is defective.
There is a defective air start distributor.
There is low control air pressure.
For any maintenance work, the sewage system should be considered as an enclosed space.
True.
False.
For the most efficient and practical separation of oil from water, what is required?
A three stage separation tank.
A two stage separation tank.
As long as possible dwell time in the separation tank.
A very high temperature 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 the auxiliary boiler feed water hotwell was found to be heavily contaminated with oil, what initial action would you take?
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 the water is clear then top scum the boiler.
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 …
The reservoir must be fitted with a fusible plug.
It can be used legally without any added safety measures.
The compressor must be fitted with a fusible plug.
The safety valve must be fitted with a fusible plug.
In a SW cooling water system where the piping is made of yorcalbro the sacrificial anodes should be made of …
Soft iron.
Aluminium.
Cast iron.
Zinc.
In a boiler, the system is set so that when the boiler is switched on, the following sequence of operation takes place…
(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.
(1) heat up and circulate fuel; (2) purge the combustion chamber; (3) turn on the fuel and ignite the flame.
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 …
A floating header.
Choosing the right material.
Leaving one end of the cooler free to move axially.
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 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 …
Transferred to a shore facility.
Discharged only when vessel is 12 nautical miles or more from land.
Discharged via OWS before entering port.
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.
The dryer getting clogged.
Ice formation and a drop in pressure on the evaporator side.
The loss of refrigerant.
On a slow speed main engine diesel the main engine turbocharger revolutions per minute are higher than normal at a fixed load, with reduced engine performance. What is the cause of this speed increase?
Burnt out exhaust valve seats or valves not closing.
Poor fuel injection causing after burning in the cylinders.
The turbine blades require cleaning.
Reduction in the gas passage of the nozzle ring.
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 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 idle cargo pump non-return valve is not closing properly.
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 the steam traps drains to see if the traps are functioning correctly.
Check that the Cargo Officer has not opened up the heating coil valves too far.
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.
On a vessel with 2 auxiliary boilers where only one boiler is required on a voyage of approximately one month, is any action required to preserve the internals of the out of use boiler?
No action is required as the voyage time is sufficiently short.
The boiler should be put into wet lay-up – i. e. filled completely with water dosed with a raised level of oxygen scavenging chemical such as hydrazine.
The boiler should be fired periodically to keep it warm but not enough to raise steam.
The boiler should be put into dry lay-up – ie drained and opened up with ventilation provided to keep the internals dry.
On completion of a generator engine overhaul you find that the bottom end bolts have been over-tightened beyond their elastic limit. What should you do?
Refuse to run the engine until you obtain and fit new bolts and have them tightened to the correct torque.
Leave the bolts as they are and run the engine, as checking of the bottom end shows that it is free and the bearing is not binding on the pin.
Run the engine, as you know that the bolts are tight and will not work loose.
Slacken back the bolts and have them re-tightened to the correct torque before you run the engine.
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 cause of an abnormally high condenser pressure within a refrigeration system would be …
Incondensable gases in the refrigerant.
A defective thermal expansion valve.
A low cooling water flow through the condenser.
An above normal level of refrigerant in the condenser.
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 testing of the valve travel during safety checks.
Allow testing to make sure that the valves are not stuck shut.
Allow the valves to be opened to release pressure in the event of a boiler problem.
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 incinerator loading door is interlocked …
To stop the fan and the burner when opened.
To activate a shutdown on high temperature.
To prevent opening when the inside temperatures are very high.
To prevent operation in port.
The inert gas blowers should automatically shut down in the event of …
High temperature.
A high motor load.
Deck seal failure.
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 …
Pressure testing it with the required pressure.
Bursting the disc on the cylinder jacket.
The fusible plug on the cylinder jacket.
The relief valve on the outlet side.
There is a relief valve in a refrigerant compressor lubricating oil system which is set to about …
2,5 bar above the crankcase pressure.
10 % above the crankcase pressure.
110 % of normal working pressure.
3,5 bar above the crankcase pressure.
To prevent damage of the compressor, the refrigerant return line …
Should not contain any liquid.
Should be a mixture of gas and liquid.
Should be condensed to a liquid state.
Should not go back to the compressor.
What do you believe is most important to ensure trouble free function of pneumatic controls?
Checking operation of the solenoid valves.
Maintaining the correct air pressure.
The supply of clean dry air.
Regular checking/testing of the controls.
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 doesn’t deplete the ozone layer.
It is non-corrosive and non-irritant.
It is non-toxic and non-flammable.
It is readily available world wide.
What is meant by hunting in a control system?
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.
The system being controlled does not settle on the set point.
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 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?
Fouling of the heat transfer surface.
An air lock.
Low water flow.
The division plate joint failure.
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?
Incorrect fuel pump timing.
Incorrect valve timing.
A partly blocked air cooler.
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.
The lubricating oil is at an operating temperature that is too high.
The wrong grade of lubricant being added to the crankcase.
Fuel leakage into the crankcase.
What would you expect the main source of inert gas to be in a VLCC?
The main and auxiliary boiler.
A gas turbine plant with an after burner.
An independent inert gas generator.
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 carrying out a generator engine overhaul, why is it important to check the bottom end bearings for ovality?
Because if the ovality of the bottom end bore is over the allowable tolerance, the new bearing shell may bind on the bottom end pin and cause overheating.
Because the ovality of the rod bore may allow the bearing to knock and cause early failure.
Because the ovality of the rod bore may cause misalignment of the but serrations and overloading of the bottom end bolts.
Because the ovality of the rod bore will allow increased clearance of the bearing and loss of oil pressure.
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 in heavy weather.
When the ship loads a full cargo and is at maximum draught.
When the ship is entering an area where there will be restricted under keel clearance.
When the bunker fuel needs more purification, you should normally …
Operate two purifiers in parallel.
Change the gravity disc.
Increase the purifier throughput.
Operate two purifiers in series.
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.
Where the main steering gear comprises two or more identical power units, then …
There must be two identical control systems, both controlled from the bridge.
Both should be powered from the emergency supply.
They should be interlocked to prevent simultaneous operation.
Two steering wheels are required.
Which of the following is most likely to make the engine run unevenly?
The fuel system not being primed.
Unsuitable fuel.
Sticky fuel pump control racks or linkage.
Water in the fuel.
Which of the following proportions make up good quality inert gas, from an inert gas generator plant?
Nitrogen 77 % by volume, carbon dioxide 13 %, oxygen 4 %, no water content.
Nitrogen 75 % by volume, carbon dioxide 13 %, oxygen 12 %, some 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 refrigerants do not contain CFC?
R11.
R12.
R134a.
R22.
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 critical that all cargo instrumentation is maintained in good order at all times?
For safe operations, safety of personnel, the vessel and the environment as applicable to each type of vessel.
Because all items are covered under the vessel’s planned maintenance and should be completed in accordance to the overhaul schedules.
To ensure that the correct quantities of cargo are being loaded/discharged.
To prevent defects being raised by Port State Control or Vetting inspectors.
Why is it necessary to preheat the engine before attempting to start it?
To ensure that it starts first time.
To reduce start failure.
To reduce thermal stresses.
To reduce the temperature gradient.
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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