CES CBT Test Online about Low Temperature Insulation

Welcome to the website where you can pass online the CES CBT CD-0099 test on the subject «Low Temperature Insulation on Gas Carriers». 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 «Low Temperature Insulation on Gas Carriers». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.

«Low Temperature Insulation on Gas Carriers» subject includes theoretical and practical information about advanced training for work on any type of vessel. This specialized training focuses on the unique challenges and critical importance of maintaining the integrity of low-temperature insulation systems used on Liquefied Natural Gas (LNG) and other gas carriers. Sailors will gain a deep understanding of the different insulation materials and their properties, as well as the potential hazards associated with leaks or failures. The test will also cover best practices for inspection, maintenance and repair of these crucial systems, ensuring the safe and efficient transport of liquefied gases across the world’s oceans.

On this site Crew Evaluation System Test on the subject «Low Temperature Insulation on Gas Carriers» contains 18 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: 18.

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How often are inspections of void spaces normally carried out?

Once a year.

Every 6 months.

Once every 5 years.

Whenever the need arises.

If closed moulds are used for in-situ insulation, the filling volume is not to exceed:

200 l pr. filling.

120 l pr. filling.

300 l pr. filling.

60 l pr. filling.

Is it necessary to refill cavities that are filled with perlit?

Yes, within one year after the vessel has been taken into service, and then at regular intervals.

No, it is not necessary to refill.

Only if a tank has been damaged.

Only if the perlit has been soaked with water.

The cellular plastics insulation contracts approximately:

2,5 times more than aluminium and 5 times more than Nickel Steel at -163 °C.

0,25 times more than aluminium and 2 times more than Nickel Steel at -163 °C.

0,5 times more than aluminium and 2 times more than Nickel Steel at -163 °C.

Equal to aluminium and Nickel Steel at -163 °C.

What are some of the indicators of thermal loss?

Ice or humidity on the surface of the insulation.

Bumps or irregular surface on the insulation.

Discoloration of the vapour barrier.

I don’t know.

What is important to keep in mind about U-profiles that are used on pipes supports?

That they must not be fastened against the pipe.

That they must be made of a flexible material to protect against stress.

That they should be fastened tightly around the pipe.

That they should only allow movement on the lateral axis.

What is the atmospheric content of oxygen that is required for entry?

21 %.

12 %.

14 %.

24,5 %.

What is the maximum allowable LEL content for permitting entry when entering void spaces?

1 %.

12 %.

2,8 %.

9 %.

What is the most common type of insulation material onboard gas tankers today?

Cellular plastics.

Cellular glass.

Cork.

Mineral wool.

What should you do if the elastic bellow between the hatch opening and tank on a cylindrical cargo tank should crack?

Replace it.

Patch it with approved mastic filler.

Remove it.

Repair it with an elastic filler and seal it off with a vapour barrier.

When insulating straight line pipes it is important that each layer is:

Staggered at 180°.

Parallel to the previous layer.

Secured with externally mounted straps or pop rivets.

Separated by a moisture barrier.

Where will you find information about emergency procedures for a specific cargo?

On the cargo data sheet.

On the cargo tank’s labelling.

On the ship’s cargo manifest.

On the ship’s emergency plan.

Which of the following has highest diffusion resistance?

Polyurethane foam.

Air.

Mineral wool.

Perlit.

Which of the following is NOT a requirement of insulation used on pipes and containers?

It should prevent gas leakages.

It should prevent heat transfer.

It should prevent water leakage.

It should provide external protection of the insulation.

Which of these is the most common way to reduce tank pressure on a LNG tanker?

To use the gas as fuel.

To discharge the gas into the atmosphere.

To let the pressure escape through the safety valves.

To transfer the pressure over to another tank.

Which type of material is normally used in the construction of a cargo tank designed for transporting LPG at atmospheric pressure?

Carbon-Manganese steel.

9 % Nickel steel.

Aluminium.

Stainless steel.

Why do we insulate cargo tanks and other components?

To prevent heat flow into the cargo, and to protect the ship’s structure.

To prevent heat flow in the cargo, and to protect the ship’s bunker tanks.

To protect the crewmembers.

To save fuel.

Why does the formation of ice along the hatch frame on the deck tank require reinsulation?

It can cause corrosion.

It can cause loss of cargo.

It can cause the cooling plants to overload.

It can cause the hull structure to become brittle.