Welcome to the website where you can pass online the CES CBT CD-0412 test on the subject «Marine Fuels, Specification ISO 8217». 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 «Marine Fuels, Specification ISO 8217». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«Marine Fuels, Specification ISO 8217» 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 «Marine Fuels, Specification ISO 8217» contains 28 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.
Total sediment (potential) is a measure of which of the following?
Deposit of sediment due to storage of fuel over a period of time at elevated temperatures.
Deposit of sediment due to suspended solids.
Deposit of sediment due to poor combustion.
Deposit of sediment due to mixing with other fuels.
A value for fuel viscosity is required for a number of operational reasons. Select all of the operations for which a viscosity value for the fuel is required from the options given:
Calculating storage temperatures to ensure transfer of fuel is possible.
Calculating a safe storage temperature.
Calculating the quantity of the fuel onboard.
Calculating flow rates for purifiers.
A value for fuel density is required for a number of operational reasons. Select all of the operations for which a density value for the fuel is required from the options given:
Setting the temperature to achieve correct fuel injection viscosity.
Setting up purifiers.
Vessel stability calculations.
Calculating the mass of fuel.
Limits for Micro Carbon Residue, MCR, are included in both of the ISO 8217 fuel tables. Which of the following is the best description of the effect of a high value of MCR?
Frequent cleaning of purifiers will be required.
Blockage of fuel filters may occur.
Heavy fouling of engine cylinder and exhaust system may occur in the event of poor combustion conditions.
Seizure of injection system may occur.
Which of the following quality indicators is included in the ISO 8217 tables?
An ignition quality indicator for distillate fuels.
A combustion quality indicator for residual fuels.
An ignition quality indicator for residual fuels.
A combustion quality indicator for distillate fuels.
Asphaltenes are complex, unsaturated hydrocarbon molecules contained in residual fuels. Select any of the likely problems from the following options which may result from fuels with high asphaltene content.
An increase in abrasive wear.
A poor combustion performance.
An increase in sludge formation.
Heavy fouling of separators.
The two tables in the current edition of the ISO Standard for marine fuels both contain which of the following indicators?
CCAI limits for residual fuels.
Sulphur limits according to MARPOL Annex VI.
Energy equivalent values.
Conradson carbon residue limits.
Each residual fuel grade is designated by a code consisting of three letters and a number. An example of this is the RMG 380. What does the number signify?
Kinematic viscosity at 50 °C.
Kinematic viscosity at 150 °C.
Density at 15 °C.
Density at 50 °C.
Select, from the options given, all of the possible effects of using fuel with a high sulphur content.
Increased SOx emissions.
Cold corrosion may occur if correct temperatures are not maintained.
Hot corrosion may occur if sodium is also present.
Ignition delay will be increased.
Operating a diesel engine on fuel oil containing used lubricating oil may result in engine damage due to high levels of debris or remaining additives it may contain. Which of the following options is recognised as an indication of used lubricating oil being present in fuel?
Zinc, calcium and phosphorus levels all above limit values.
Zinc, copper and phosphorus present but levels below the limits.
Zinc, calcium and lead levels above limit values.
Copper, calcium and phosphorus levels above limit values.
Although the stability of a fuel is important the ISO 8217 standard tables do not include any absolute stability indicators. Which of the following statements gives the best description of a stable fuel?
A stable fuel is one which remains in its original condition during storage and handling under varying conditions.
A stable fuel is one which can be mixed with other fuels.
A stable fuel is one with only one component.
A stable fuel is one which contains no other elements other than hydrogen and carbon.
Although an energy equivalent indicator is not included within the ISO 8127 fuel standard tables it is still an important indication of a fuels quality. Which of the following range of energy levels is most representative of marine fuels?
39 to 42 MJ/kg.
22 to 25 MJ/kg.
32 to 35 MJ/kg.
49 to 52 MJ/kg.
Which of the following temperature limits is included in the ISO 8217 standard because of safety reasons?
Flash point.
Pour point (Summer).
Cloud point.
Pour point (Winter).
Which one of the following chemical elements is the most likely to increase the risk of high temperature corrosion when present with vanadium during combustion of fuel oil?
Calcium.
Sodium.
Phosphorus.
Sulphur.
Which of the following statements is the most accurate with reference to the term “combustion quality”?
Combustion quality and ignition quality of a fuel are the same thing.
The combustion quality of a fuel refers to how easily the fuel can be ignited.
Combustion quality of a fuel depends on the pre-treatment before use.
The combustion quality of a fuel refers to how easily the fuel burns once it has been ignited.
The ash content of a fuel is limited according to the ISO 8217 fuel tables. Which one of the following is the highest risk when operating an engine on fuel with a high ash content?
Risk of overloading purifiers.
Risk of poor combustion.
Risk of fuel system filter blockage.
Risk of abrasive damage to injection equipment and cylinder components.
The compatibility of one fuel with another cannot be measured directly and may lead to an unstable mixture. To avoid compatibility problems, which of the following options is recommended?
If mixing of different fuels cannot be avoided then mix all of the new bunkers with all of old bunkers remaining onboard.
If mixing of different fuels cannot be avoided then mix new bunkers with the minimum quantity of old bunkers possible.
If mixing of different fuels cannot be avoided then mix new bunkers with the equal quantities of old bunkers.
If mixing of fuels cannot be avoided then the mixture should be kept in storage for a long period of time to check for problems.
