Welcome to the website where you can pass online the CES CBT CD-0266 test on the subject «Exhaust Gas Scrubbers, Safe Operations». 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 «Exhaust Gas Scrubbers, Safe Operations». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«Exhaust Gas Scrubbers, Safe Operations» subject includes theoretical and practical information about advanced training for work on any type of vessel.
On this site Crew Evaluation System Test on the subject «Exhaust Gas Scrubbers, Safe Operations» contains 15 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.
For a ship not using an approved scrubber, what is the IMO maximum limit on the amount of sulphur in fuel outside an Emission Control Area, ECA?
0,5 % by mass.
0,5 % by volume.
0,1 % by mass.
3,5 % by volume.
Why is sulphur present in marine fuel oils?
It is added to improve combustion efficiency.
It is added during the refining process.
It is added to reduce engine wear.
It is an impurity which comes from crude oil.
Why can the performance of open loop scrubbers be affected by the location of the ship? Select the ONE best answer.
Because the local air and water temperatures can be very high.
Because the local air and water temperatures can be very low.
Because they rely on the wash water being alkaline, and this alkalinity varies depending on where the ship is operating.
Because the local water can already be very turbid, which makes it difficult to keep outlet turbidity low.
When might the use of open loop scrubbers not be allowed?
When the ship is not en-route.
Inside any IMO Emission Control Area (ECA).
When alongside in any port.
When local regulations have forbidden their use.
What should be done with the waste products from a closed loop scrubber?
They must be landed at a shore reception facility for safe disposal.
They can be back-flushed into the sea when more than 12 miles from land and outside an ECA.
They can be back-flushed into the sea once an ECA.
They can be burned in an incinerator.
What fluid is normally used in a closed loop scrubber?
Fresh water, with the addition of a corrosion inhibitor.
Sea water, with some chemicals added.
Untreated seawater.
Fresh water, with the addition of an alkaline.
Which TWO of these chemicals are commonly used in closed loop scrubbers?
Sodium chloride.
Sodium hydroxide (Caustic soda).
Magnesium oxide.
Magnesium chloride.
What Is the IMO “emission ratio” of a scrubber?
The ratio, by volume, of sulphur dioxide to air in the exhaust gas.
The percentage, by volume, of sulphur dioxide In the exhaust gas.
The ratio, by volume, of sulphur dioxide to carbon dioxide in the exhaust gas.
The ratio, by mass, of sulphur dioxide to carbon dioxide in the exhaust gas.
Scrubbers must have an Exhaust gas cleaning system Technical manual (ETM), and there are two ways by which they are certified. When they are certified by the manufacturer, what is the name of the scheme?
ETM B, which only requires wash water monitoring.
ETM A, which only requires wash water monitoring.
ETM A which requires daily exhaust emission monitoring.
ETM B, which requires continuous exhaust emission monitoring.
What is the normal limit for the pH of the wash water discharged into the sea from an IMO approved scrubber?
The water must be neutral, pH 7.
Not more than pH 7,5.
Not less than pH 6,5.
Not less than pH 5.
Magnesium oxide is a chemical used with some types of scrubbers. What particular precaution is necessary for the storage of magnesium oxide?
Magnesium oxide reacts with plastics, so it must only be stored in metallic containers.
Magnesium oxide must be stored on deck.
Magnesium oxide reacts with water to give off heat, so water must not be allowed to get into storage containers.
Magnesium oxide must not be stored above 30 degrees Celsius.
Why are many chemicals associated with closed loop scrubbers harmful?
Because they can cause cancer.
Because they are strongly alkaline, and can cause burns to the skin.
Because they are all highly flammable.
Because they are acidic, and can cause burns to the skin.
Where would you find full information about the hazards from the chemicals used with a scrubber? Select the ONE best answer.
By contacting the supplier in case of spillages.
From the labels on the containers.
On the Safety Data Sheet, which must accompany the chemicals.
The chemicals are relatively harmless, so no information is necessary.
If ship’s staff have any doubt about safe access to a scrubber or any of its associated gauges or sensors, what should be done?
Avoid the more dangerous access points at all times.
Use the access provided. As long as any individual feels it is safe, it probably is safe.
A formal risk assessment should be carried out, and safe means of access established.
Avoid the more dangerous access points until the ship is in port.
Which of these is a hazard which might be present in a scrubber or exhaust trunking? Select any that you think apply.
Substances which cause cancer (Carcinogens).
Lack of oxygen.
Excessive heat.
Falling from height.
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