CES CBT Online Test and Answers on Gas Carrier Basic Principles

Welcome to the website where you can pass online the CES CBT CD-0395 test on the subject «Gas Carrier Basic Principles». 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 «Gas Carrier Basic Principles». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.

«Gas Carrier Basic Principles» subject includes theoretical and practical information about advanced training for work on any type of vessel. The test provides essential knowledge about the safe operation of gas carriers. It covers aspects of working with liquefied gas cargoes on various types of vessels. Participants learn about the properties and behavior of liquefied gases, including LPG, during transportation. The course emphasizes the importance of safety procedures, emergency response and risk management on gas carriers. Practical training includes handling cargo systems, monitoring equipment and understanding operational processes. International standards, such as the IGC Code, are studied to ensure compliance with safety regulations. The subject also explores the design and construction of gas carriers, focusing on containment systems and cargo handling equipment. Overall, the course prepares students for advanced roles in the safe and efficient operation of gas carrier vessels.

On this site Crew Evaluation System Test on the subject «Gas Carrier Basic Principles» contains 12 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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Amount of questions: 12.

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According to SOLAS, what is the maximum allowable oxygen content of the inert gas produced by an inert gas generator?

Less than 5 % by volume.

Less than 3 % by volume.

Less than 8 % by volume.

There should be no oxygen present.

How can we increase the temperature at which a liquid boils?

By decreasing the pressure.

By increasing the pressure.

By moving it to high altitude.

The boiling point is a fixed value.

In relation to cargo operations on gas carriers, what does the term ‘gas freeing’ mean?

The removal of toxic and flammable gas from a tank with inert gas, followed by the introduction of fresh air.

The removal of cargo gas from a tank using fresh air, followed by the introduction of inert gas.

The removal of oxygen from a tank with inert gas.

The removal of toxic and flammable gas from a tank with inert gas.

In relation to cargo operations on gas carriers, what does the term “gassing up” mean?

Replacing an inert atmosphere in a tank with fresh air.

Replacing an inert atmosphere in a tank with the vapour from the next cargo to allow cooling down and loading.

Replacing a gas free atmosphere in a tank with the vapour from the next cargo to allow cooling down and loading.

Replacing the cargo vapour in a tank with inert gas.

Cameras, phones, radios and torches used in or near the cargo areas onboard a gas carrier must be …

… approved as safe to use in a hazardous area.

… kept switched off at all times.

… only operated on battery power.

… only used in aircraft mode.

The IGC Code requires that the ESDS emergency shutdown valves close within 30 seconds. What is the reason for this?

The valves need to close smoothly and not cause a pressure surge that would damage the pipelines.

It gives time for manual intervention to prevent closure in case of accidental tripping.

It gives time for personnel to clear the area.

That is as quickly as large valves can reasonably be expected to close.

What are the requirements of the IGC code for the pressure relief valves of cargo tanks?

At least THREE pressure relief valves.

ONE main relief valve and one smaller, auxiliary relief valve.

ONE pressure relief valve, provided that the area for venting exceeds the area of the filling line.

At least TWO pressure relief valves of equal capacity.

What is the greatest problem when storing LPG at ambient temperature?

The pressure in the tank will be about 8 bar, so this requires a very strong tank, which is both heavy and expensive.

The LPG can only be stored as a vapour at this temperature, so the amount that could be stored would not be economically viable.

The pressure in the tank is too high to be contained.

The pressure in the tank will continue to rise and must be vented.

What is the purpose of the insulation around the cargo tanks of gas carriers?

To protect the structure of the ship from contact with cold cargoes, which could cause the steel to become brittle.

To reduce the amount of heat transferred to the cargo and therefore reduce the amount of cargo that boils off.

To completely support the weight of the cargo tanks.

To reduce the amount of heat transferred from the cargo and therefore reduce the amount of cargo that boils off.

Where would you find the regulations about how the cargo refrigeration plant on your ship is constructed?

Classification Society Rules.

Flag State Rules.

The IMO’s International Gas Code (IGC).

SOLAS.

Why is Nitrogen sometimes used for inerting the tanks of gas carriers, instead of inert gas produced by combustion?

Because the products of combustion can spoil the purity of some cargoes.

Because Nitrogen can be produced more quickly.

Because Nitrogen is cheaper to produce.

Because the Nitrogen has a higher dew point.

Why is it important that the design and operation of the ship’s gas detection system takes into account the types of cargo to be carried?

Because gas detectors must be calibrated for the type of cargo carried.

Because some gases are heavier than air and some lighter than air, so this affects where the gas detectors are located.

Because the IGC code has different requirements for different cargoes.

Because an effective fixed system means that portable gas detection equipment is not needed.