Welcome to the website where you can pass online the CES CBT CD-7031 test on the subject «TOTS 1B-The Flammability Diagram». 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-The Flammability Diagram». 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-The Flammability Diagram» subject includes theoretical and practical information about advanced training for work on any type of vessel. The test provides advanced training for personnel working on various types of vessels, focusing on the understanding and application of flammability diagrams to prevent fires and explosions on board. This training covers the principles of flammability, including the characteristics of flammable liquids, gases and vapors, and the factors that affect their ignition and combustion. Participants learn how to read and interpret flammability diagrams, which are critical tools for identifying the flammable range of substances and determining the risk of fire or explosion. The course also covers the application of flammability diagrams in various shipboard scenarios, including cargo operations, tank cleaning and hot work. Practical exercises and case studies are used to demonstrate the use of flammability diagrams in real-world situations, emphasizing the importance of accurate interpretation and decision-making. Upon completion, participants are equipped with the knowledge and skills to use flammability diagrams to identify and mitigate fire and explosion hazards on board vessels, ensuring a safe working environment for crew members.
On this site Crew Evaluation System Test on the subject «TOTS 1B-The Flammability Diagram» contains 19 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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Exam
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* Some questions may have more than 1 correct answer.
After inerting a cargo tank, the oxygen content was found to be 7,5 %, and the hydrocarbon gas content 2 %. Using the Flammability Diagram, would you consider the tank to be safely inerted before gas freeing?
Yes, the atmosphere is below the critical dilution line.
No, inerting must be continued.
No, the tank atmosphere is in the Flammable Range.
Yes, the tank atmosphere would remain too rich to support combustion.
Define the «Lower Flammable Limit» of a hydrocarbon gas?
It is the gas concentration below which there is not sufficient gas to support and propagate combustion.
It is the gas concentration above which there is not sufficient air to support and propagate combustion.
It is the gas concentration above which there is too much gas to support and propagate combustion.
It is the gas concentration below which there is not sufficient oxygen to support and propagate combustion.
Define the «Upper Flammable Limit» of a hydrocarbon gas?
It is the gas concentration above which there is too much oxygen to support and propagate combustion.
It is the gas concentration above which there is not sufficient air to support and propagate combustion.
It is the gas concentration below which there is not sufficient gas to support and propagate combustion.
It is the gas concentration below which there is not sufficient oxygen to support and propagate combustion.
Explain why the atmosphere in a cargo tank must be sampled at different depths?
To ensure that enough gas is drawn through the equipment to avoid it remaining in the sampling line.
To make sure that the detection equipment is working correctly.
Due to the high relative density of hydrocarbon gas, it tends to layer, and collect in pockets.
To obtain an average reading throughout the tank.
In practical terms, what figures can be used for the Lower and Upper Flammability Limits of oil tanker cargoes?
19 % and 21 % of oxygen.
1 % and 10 % of gas.
5 % and 21 % of oxygen.
5 % and 50 % of gas.
The characteristics of the vapours given off by clean products such as motor or aviation gasoline can be represented by those of butane. What is the relative density of butane?
1,00.
2,00.
2,55.
5,50.
The characteristics of the vapours given off by crude oil can be represented by those of propane. What is the relative density of propane?
0,55.
1,00.
1,55.
5,50.
The characteristics of the vapours given off by natural gasolines can be represented by those of pentane. What is the relative density of pentane?
0,55.
1,00.
2,50.
5,50.
The flammable limits for the vapours given off by clean products such as motor or aviation gasoline can be represented by those of butane. What is the Lower Flammable Limit of butane?
19 % by volume in air.
9 % by volume in air.
5,9 % by volume in air.
1,9 % by volume in air.
The flammable limits for the vapours given off by crude oil can be represented by those of propane. What is the Lower Flammable Limit of propane?
22 % by volume in air.
10 % by volume in air.
5,2 % by volume in air.
2,2 % by volume in air.
The flammable limits for the vapours given off by natural gasolines can be represented by those of pentane. What is the Lower Flammable Limit of pentane?
1,5 % by volume in air.
4,5 % by volume in air.
7,8 % by volume in air.
21 % by volume in air.
What is the relative density of hydrocarbon gas at concentrations near the Lower Flammable Limit?
Approximately 0,7, lighter than air.
Approximately 1,0, the same as air.
Approximately 1,5, heavier than air.
Approximately 2,0, much heavier than air.
With reference to the Flammability Diagram, if a cargo tank atmosphere was at point F, what would be the effect of diluting with fresh air?
The hydrocarbon concentration would be increased, taking the atmosphere into the Flammable Range.
The hydrocarbon concentration would be reduced, and the oxygen level increased, resulting in a safe tank atmosphere.
The oxygen level would be increased, resulting in a safe tank atmosphere.
The hydrocarbon concentration would be reduced, and the oxygen level increased, taking the atmosphere into the Flammable Range.
With reference to the Flammability Diagram, if a cargo tank atmosphere was at point F, why would it be necessary to dilute the atmosphere to point H with inert gas before gas freeing with fresh air?
To reduce the hydrocarbon level below the critical dilution line.
To help prevent corrosion in the tank.
To increase the hydrocarbon level above the Upper Flammable Limit.
To reduce the oxygen level to below the critical dilution line.
With reference to the Flammability Diagram, if a cargo tank atmosphere was at point F, would you consider it to be safe to purge with inert gas with an oxygen content of 8 %?
No, the tank atmosphere is in the Flammable Range.
No, the tank must first be gas freed with fresh air.
Yes, the atmosphere would remain outside the Flammable Range.
Yes, the tank atmosphere would remain too rich to support combustion.
With reference to the Flammability Diagram, what conditions are shown at point A?
The tank contains fresh air, with no hydrocarbon gas, and cannot support combustion.
The hydrocarbon gas concentration is at its Lower Flammable Limit.
The tank atmosphere contains no oxygen, and cannot support combustion.
The tank atmosphere is too rich to support combustion.
With reference to the Flammability Diagram, what conditions are shown at point B?
The tank atmosphere is too rich to support combustion.
The hydrocarbon gas concentration is at its Lower Flammable Limit.
The hydrocarbon gas concentration is at its Upper Flammable Limit.
The tank atmosphere is too lean to support combustion.
With reference to the Flammability Diagram, what conditions are shown at point C?
The hydrocarbon gas concentration is at its Lower Flammable Limit.
The hydrocarbon gas concentration is at its Upper Flammable Limit.
The tank atmosphere contains no oxygen, and cannot support combustion.
The tank atmosphere is too rich to support combustion.
With reference to the Flammability Diagram, what conditions are shown at point D?
The hydrocarbon gas concentration is at its Lower Flammable Limit.
The hydrocarbon gas concentration is at its Upper Flammable Limit.
The tank atmosphere contains no oxygen, and cannot support combustion.
The tank atmosphere is too lean to support combustion.
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