Welcome to the website where you can pass online the CES CBT CD-4101 test on the subject «Tank Cleaning 1, Introduction and Safety». 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 «Tank Cleaning 1, Introduction and Safety». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«Tank Cleaning 1, Introduction and Safety» subject includes theoretical and practical information about advanced training for work on any type of vessel. The test provides comprehensive training on the procedures and precautions necessary for effective tank cleaning on various types of vessels. Participants learn about the theoretical aspects of tank cleaning, including the chemical properties of different residues and the environmental regulations that must be followed. The course emphasizes the importance of safety protocols, teaching participants how to identify and mitigate risks associated with hazardous materials and confined spaces. Practical training sessions are designed to equip workers with hands-on experience in using specialized cleaning equipment and personal protective equipment. Trainees are instructed in emergency response procedures to ensure they can react swiftly and appropriately in case of accidents or unexpected situations. The program covers the different cleaning techniques applicable to various tank types, ensuring that participants can adapt their approach depending on the vessel’s specifications. Regular assessments and simulations are conducted to evaluate the trainees’ understanding and readiness, reinforcing their competence in performing tank cleaning tasks safely and efficiently.
On this site Crew Evaluation System Test on the subject «Tank Cleaning 1, Introduction and Safety» 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.
Choose the regime, in which you want to pass CES test:
Training
Exam
Wild Mode
* Some questions may have more than 1 correct answer.
Two different materials rubbing against each other.
ISGOTT is published by ICS, OCIMF and IAPH. Why is it wise to have this publication on board a tanker?
It deals with environmental issues in relation to tankers.
It deals with industrial best practices on all aspects of the safe carriage and handling of oils on board tankers and at terminals.
It is required by IMO.
It is required by international law.
Is it allowed to recirculate the tank cleaning water after carrying a cargo of petroleum?
No – recirculation the tank cleaning water will increase the risk of an electrostatic discharge, therefore it is not allowed under any circumstances.
No – recirculation will prevent the tank from becoming clean.
Yes – if the tanks are inerted, it is allowed to recirculate the tank cleaning water.
Yes – it is always allowed to recirculate the tank cleaning water.
The common denominator for almost all incidents and accidents during tank cleaning is found to be:
Bad weather.
Malfunctioning or insufficient equipment.
Human factors.
Wrong or insufficient cargo information.
The fire hazard is controlled by «removing» the oxygen side in the fire-triangle when cleaning an inerted tank. How do we control the fire hazard if the tank is not inerted?
By «removing» both the fuel and the sources of ignition.
By «removing» both the fuel, oxygen, and the sources of ignition.
By «removing» the fuel.
By «removing» the sources of ignition.
What is the flashpoint?
The minimum energy required to ignite an explosive mixture.
The minimum gas percentage required for a gas/air mixture to ignite.
The lowest temperature where a liquid will vapourize to form an ignitable mixture in air.
The temperature at which a substance will spontaneously ignite without an external heat source.
What will happen with the flammable range if the oxygen content is lowered?
Nothing will happen.
The flammable range is not oxygen dependent.
The range will become wider.
The range will become more narrow.
When gasfreeing on board a tanker without inertgas, when can you start to gasfree at deck level instead of using the high velocity vents or the dedicated ventilation pipes?
When the gas concentration is less than 10 percent of the lower flammable limit.
When the gas concentration is less than 20 percent of the lower flammable limit.
When the gas concentration is less than 30 percent of the lower flammable limit.
When the gas concentration is less than 40 percent of the lower flammable limit.
When is a tank considered to be fully inerted in accordance with SOLAS?
At max 5 % oxygen.
At max 8 % oxygen.
At max 11 % oxygen.
At max 15 % oxygen.
When is it safe to clean a tank using steam?
When it has either been inerted or cleaned and gas freed.
After a line and bottom flush where the residues have been transferred to a slop tank.
Before ventilation.
It is never safe to clean a tank using steam.
When oil is flowing through a steel pipe both will be electrostatically charged in such a way that:
Both will be negatively charged.
Both will be positively charged.
One will be negatively charged, the other will be positively charged.
None of them will be charged.
Which of the following gases has the highest relative density?
Hydro-Carbon gases.
Air.
Methane.
Nitrogen.
Which event or operation could lead to a charge separation within a tank? (More than one alternative may be correct)
Steaming.
Liquid flowing through pipes.
Tank cleaning.
Water and/or air in product.
While cleaning a non-inerted tank you are testing the atmosphere with an explosimeter. You measure 25 % of the Lower Flammable Limit. Will you stop the cleaning and ventilate?
No, I will not stop and ventilate since there are no limitations.
No, I will not stop and ventilate since the maximum limit is 35 % of the Lower Flammable Limit.
Yes, I will stop and ventilate since the maximum limit is 10 % of the Lower Flammable Limit.
Yes, I will stop and ventilate since there should be no flammable gases present.
You have decided to add tank cleaning chemicals to the tank cleaning water. You are washing in a non-inert atmosphere. What will you do?
Ensure that tank cleaning chemicals are only used if the temperature of the wash water is below 60 degrees Celsius.
Ensure that the oxygen content of the tank is below 11 %.
It is not allowed to use tank cleaning chemicals on board a non-inerted ship.
Start cleaning with the chemical using hot water.
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