CES CBT Online Test on 1C-Enclosed Spaces and Tank Atmosphere

Welcome to the website where you can pass online the CES CBT CD-7050 test on the subject «TOTS 1C-Enclosed Spaces and Tank Atmosphere». 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 1C-Enclosed Spaces and Tank Atmosphere». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.

«TOTS 1C-Enclosed Spaces and Tank Atmosphere» subject includes theoretical and practical information about advanced training for work on any type of vessel. The test delivers crucial advanced training for personnel operating on various vessel types. This comprehensive program blends knowledge with practical application concerning enclosed space entry and tank atmosphere management. Participants gain a thorough understanding of the hazards associated with enclosed spaces, including oxygen deficiency, toxic gases and flammable atmospheres. The training covers proper procedures for risk assessment, ventilation and atmospheric testing before and during entry. Sailors learn to use and maintain gas detection equipment, interpreting readings accurately to ensure a safe environment. Emphasis is placed on emergency response protocols, including rescue techniques and communication procedures. Practical exercises simulate real-world scenarios, enabling trainees to develop competence in safe entry and work practices. Successful completion equips individuals with the skills and knowledge to mitigate risks effectively and ensure compliance with maritime safety regulations, promoting a safer working environment on board.

On this site Crew Evaluation System Test on the subject «TOTS 1C-Enclosed Spaces and Tank Atmosphere» contains 27 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: 27.

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A Permit to Work is required before an enclosed space is entered. Who should complete this permit?

It must be authorised by the Company office.

The Master.

The person who is to carry out the work.

The Authorising Officer, normally the head of department.

For how long must the ventilation of a space be stopped before conducting tests of the atmosphere for an Enclosed Space Entry?

10 minutes.

30 minutes.

Briefly, while the tests are being carried out.

The ventilation should be run continuously.

For what purpose would you use a personal gas detector?

To monitor atmospheric conditions during an enclosed space entry.

To check the atmosphere of an enclosed space before entry.

To test an enclosed space before starting hot work.

To test the atmosphere of an open space before starting hot work.

For what purpose would you use a personal oxygen meter?

Testing an enclosed space before starting hot work.

Testing the atmosphere of an open space before starting hot work.

To monitor atmospheric conditions during an enclosed space entry.

To check the atmosphere of an enclosed space before entry.

How long should ventilation be continued after the atmosphere of an enclosed space has been found suitable for entry?

Continuously while the space is occupied, and even during temporary breaks.

For at least one hour after successful testing.

It can be stopped when testing shows that the space is suitable for entry.

It should be continued after testing until the space is actually entered.

How many different locations within a tank should be sampled to test the atmosphere before entering a tank?

As close as possible to the centre of the tank.

At various depths, and through as many openings as possible.

At least three locations.

In one position, at a minimum of three levels.

How many people should be allowed to enter an enclosed space to carry out routine work?

Only the number actually required to carry out the work.

Only two people.

The number required to carry out the work, plus one extra watchman.

The number required to carry out the work, plus the person in charge and one extra watchman.

To comply with an Enclosed Space Entry Permit, when must the atmosphere of an enclosed space be tested?

Before entry, and at frequent intervals when personnel are in the space.

Before entry and after completion of work.

Every four hours.

In the morning, before daily routine work starts.

What action should be taken if personnel working in an enclosed space feel unwell or suspect the presence of gas?

The Officer of the Watch, or whoever signed the entry permit, should be advised of the situation.

They should request a crew member to bring breathing apparatus into the space.

They should request a crew member to verify the atmosphere.

They should leave the space immediately and contact the Person In Charge or Officer of the Watch.

What action should be taken if personnel working in an enclosed space get into difficulties?

All personnel should be instructed to leave the space immediately.

The first person on the scene should immediately enter the space to give assistance.

The Watchman should immediately enter the space to give assistance.

The general alarm should be sounded and the rescue team should enter using breathing apparatus under the direction of the Person In Charge.

What action should be taken if routine tests indicate the presence of gas while personnel are present in an enclosed space?

The personnel should leave the space immediately and contact the Person In Charge or Officer of the Watch.

The gas testing equipment should be checked to verify its accurate.

The Watchman should be instructed to bring the breathing apparatus into the space as back up.

The work must be completed as soon as possible and then vacate the space.

What actions must be taken to isolate a tank before entry?

Blank off the pipelines to the tank, close and secure all valves and inform the Officer of the Watch.

Request the Officer of the Watch to stop all cargo and ballast pumps.

Stop all cargo and ballast operations.

Stop all ventilation and inform the Officer of the Watch.

What documentation should be completed before carrying out welding in a double bottom tank?

A Risk Assessment and a Hot Work Permit.

A Risk Assessment, an Enclosed Space Entry Permit and a Hot Work Permit.

A Risk Assessment and an Enclosed Space Entry Permit.

An Enclosed Space Entry Permit and a Cold Work Permit.

What equipment is required to be kept at the entrance of an enclosed space during entry?

A resuscitator or escape breathing set.

A resuscitator, breathing apparatus, a lifeline and a harness, a torch or a lamp.

Enough escape breathing sets for all personnel in the space.

Spare tools and parts for the work being undertaken.

What equipment must be used to test an enclosed space for the presence of toxic gas before entry?

A tankscope.

A toxic gas detector.

An explosimeter.

An oxygen meter.

What gas detection equipment must be used to test the atmosphere of a cargo tank before entry is permitted?

An oxygen meter, a combustible gas indicator and a toxic gas detector if necessary.

A combustible gas indicator and a toxic gas detector if necessary.

An oxygen meter and a tankscope.

An oxygen meter and a toxic gas detector if necessary.

What indication will be given by an Explosimeter in case of oxygen deficiency?

No indication.

Approximately 20 % of the Lower Flammable Limit.

Full scale deflection.

The indication is erratic and jumpy.

What is the maximum length of time an Enclosed Space Entry Permit can remain valid?

Four hours.

Eight hours.

The estimated time required to complete a particular task.

Twenty four hours.

What is the maximum permitted level of hydrocarbon gas for an enclosed space entry?

1 % of the Lower Flammable Limit.

1 % by volume.

10 % of the Lower Flammable Limit.

10 % of the Occupational Exposure Limit.

What is the maximum permitted level of toxic gas for an enclosed space entry?

1 % of the Lower Flammable Limit.

10 % of the Lower Flammable Limit.

It varies according to the particular gas, but 1% is an acceptable level.

The Occupational Exposure Limit, which varies according to the particular gas.

What potential hazards would be caused in a machinery space by the release of carbon dioxide for fire extinguishing purposes?

A lack of oxygen.

Carbon dioxide which is toxic to breathe.

The carbon dioxide gas would be very cold, and could cause severe cold damage to the skin.

Vapour, which may reduce visibility.

What use can be made of a combustible gas detector when making a Risk Assessment for tank entry?

Testing for hydrocarbon vapours up to the Lower Flammable Limit.

Testing for hydrocarbon vapours up to 100 % concentration.

Testing for oxygen content up to 21 %.

Testing for toxic gases up to any concentration.

Who is required to standby at the entrance of an enclosed space during entry?

At least one watchman, equipped to communicate with the personnel inside and with the Officer of the Watch.

Nobody, provided the personnel inside are equipped to communicate with the Officer of the Watch.

The Officer of the Watch and one watchman, equipped to communicate with the personnel inside.

The Officer of the Watch, or whoever signed the Entry Permit.

Who is responsible for cancelling an Enclosed Space Entry Permit when work is completed?

Any other senior officer.

The Master.

The person who completed the work.

The person who authorised the permit.

Why could an unprotected steel space, which has been closed, produce a hazardous atmosphere?

Because oxygen in the atmosphere may be depleted by reacting with the steel (i. e. corrosion).

Because hydrocarbons could be liberated from rust scale in the tank.

Because the level of nitrogen in the atmosphere would be increased by corrosion.

Because toxic gases may be given off by the process of corrosion.

Why could an unventilated ballast tank fitted with Cathodic Protection contain a hazardous atmosphere?

Because hydrocarbons could be produced by the Cathodic Protection.

Because the Cathodic Protection could produce an oxygen enriched atmosphere.

Because hydrogen is produced by the Cathodic Protection.

Because the Cathodic Protection would increase the level of nitrogen in the atmosphere.

Why must the enclosed space atmosphere be sampled at a variety of positions?

To allow for the density of the gas and to check for any gas pockets which may have accumulated in blind spots.

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.

To obtain an average reading throughout the tank.