Welcome to the website where you can pass online the CES test on the subject «Hot Works». 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 «Hot Works». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«Hot Works» subject includes theoretical and practical information about advanced training for work on any type of vessel. Knowledge of this information directly shows employee’s competence who holds a relevant post on a vessel. Hot works on vessels refer to any activities involving the use of open flames, sparks, or extreme heat that pose a risk of fire or explosion. These works typically include welding, cutting, grinding, brazing, and other related tasks. Due to the inherent dangers, hot works require proper safety precautions, such as obtaining permits, implementing fire prevention measures, conducting gas tests, providing adequate ventilation, and having firefighting equipment readily available.
On this site Crew Evaluation System Test on the subject «Hot Works» contains 72 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.
Start test
A broken hand rail at the bottom of a ladder in a cargo tank is to be cropped and a replacement length welded in place. Which of the following “permits to work” will be required before this job can be started? Select all applicable answers:
A “Hot Work Permit”.
An “Enclosed Space Entry” permit.
A “Permit to Work Aloft”.
A permit to “Work over the Side”.
No permit will be required.
Next question
Who is responsible for ensuring that adequate arrangements are provided for contractors or work gangs, temporarily employed on-board, to understand and comply with all relevant safe working practices?
The Master.
The Superintendent.
The Contractor.
The Shore supervisor.
Show result
A damaged bracket in cargo tank 1 port is to be cut away and replaced. The vessel is at sea and is not inerted. Although not loaded, there are some slops in cargo tank 1 starboard. What must happen to these slops before work can start?
The slops must be transferred to a non-adjacent tank, at least 30 metres from the location at which the hot work is taking place and securely isolated.
Tank 1 starboard should be securely sealed and water run continuously across the deck whilst the hot work repair is taking place.
Provided the tank lids are securely closed and all valves closed, it is not necessary to do anything with the slops.
The slops can remain in cargo tank 1 starboard but the tank must be isolated from both the Inert Gas main and the cargo piping system while the hot work is being carried out.
Next question
A hot work modification is to be carried out in the middle of the after transverse bulkhead of an engine room spare gear store. Which of the following could be at risk of damage directly on the other side of the bulkhead in the fitter’s workshop? Select all applicable answers:
Paint.
Wooden shelving.
Welding electrodes, contained in a plastic wallet, stored on the wooden shelves.
Electrical cables on the opposite transverse bulkhead of the fitter’s workshop.
The electric light fittings on the deck head in the fitter’s workshop.
Spare small bore air and hydraulic hoses hanging in racks on the adjacent longitudinal bulkhead in the fitter’s workshop.
Next question
A hot work repair is required on a pipeline on the deck of a tanker. The first available flange at which the pipeline can be disconnected and isolated is a long way aft, just in front of the pump room. What recommended precaution will you follow while the repair is being carried out?
Continuously through-ventilating the pipeline with fresh air and monitoring the exhausting air for hydrocarbon vapour.
Flushing the pipeline continuously with fresh water.
Periodically blowing through the pipeline with inert gas and monitoring for oxygen content of at least 15 %.
Next question
A hot work repair is to take place on a bracket in a forward fuel tank. The tank has been cleaned and gas-freed but how should the heating coils in the tank be treated before that hot work begins?
They should be flushed or blown through with steam and then tested to ensure they are clear of hydrocarbons.
They should be continuously blown through with fresh air while the hot work repair is taking place.
They should be disconnected and removed from the tank.
They should be continuously blown through with inert gas while the hot work repair is taking place.
Next question
A hot work repair is to take place on a ladder in a cargo tank. How should pipelines that connect the tank to other cargo spaces be treated before that hot work begins?
They should be flushed through with water, drained, vented and isolated from the compartment where hot work will take place.
It is not necessary to do anything special with the pipelines, as the repair is to a ladder.
They should be continuously blown through with fresh air while the hot work repair is taking place.
They should be disconnected and removed from the tank.
Next question
A hot work repair is to take place on a ladder in a fuel bunker tank. How should pipelines connected to the tank be treated before that hot work begins?
They should be flushed through with water, drained, vented and isolated from the compartment where hot work will take place.
It is not necessary to do anything special with the pipelines, as the repair is to a ladder.
They should be continuously blown through with fresh air while the hot work repair is taking place.
They should be disconnected and removed from the tank.
Next question
A level monitor is to be installed in a slop tank on a chemical tanker that is not inerted. Hot work is required. How should the space be treated before that work starts? Select all applicable answers:
The tank should be thoroughly cleaned and gas freed to hot work standard.
It is not permitted to perform hot work in a dedicated slop tank, unless the vessel is in dry dock.
The tank should be inerted.
The tank should be pre-washed to remove the majority of residues.
Next question
A retaining bracket is to be re-welded to the bottom of a bulkhead in a storeroom off the engine room. Which of the following areas will need to be checked for the presence of combustible materials before any hot work is commenced? Select all applicable answers:
The storeroom where the repair is to take place.
Shelving above and immediately to one side of the hot work location.
The space directly below the work site.
The space on the other side of the bulkhead.
The complete machinery space.
The Engine Control Room.
Next question
A section of pipe has been disconnected and taken aft to a dedicated gas safe area on the poop deck behind the accommodation block. Is it necessary to perform a Risk Assessment?
Yes.
No.
Next question
A what minimum distance is a hot work repair permitted from the bulkhead of a bunker tank, assuming it has not been cleaned a tested for hot work?
500 mm.
30 m.
2 m.
30 mm.
Next question
At which of the following times should hot work be prohibited on a tanker? Select all applicable answers:
During cargo operations.
During ballast operations.
During tank cleaning.
When gas freeing.
During purging or inerting.
At anchor.
Next question
Before any hot work task can take place, what is required?
Careful assessment of all related hazards, and the probability of their occurrence, to determine the severity of the risks involved.
Only an order from the Master or Chief Engineer.
The completion of the record in the “Hot Work file”, so that the vessel will pass its audits.
A quick check of the intended hot work site to make sure everything seems safe.
Next question
Fire safety precautions that may be taken in preparation for hot work might include which of the following? Select all applicable answers:
Briefing personnel on action to be taken in the event of an emergency.
Dressing personnel in fire-fighting gear to be fully ready to move immediately in the event of an emergency.
Bringing extinguishers and other equipment to a stand-by location.
Starting the main or emergency fire pump and running and charging fire hoses.
Next question
Fire safety precautions that may be taken in preparation for hot work might include which of the following? Select all applicable answers:
Rigging fire curtains and blankets to contain welding sparks and molten slag.
“Damping down” or performing boundary cooling in adjacent spaces.
Arranging for the testing of the atmosphere at the hot work site and in adjacent spaces.
Inerting adjacent spaces, where appropriate.
Next question
For hot work to take place in the machinery space, what is the minimum distance that it can take place from a bunker tank containing fuel oil?
At least 500 mm.
At least 600 mm.
At least 1 000 mm.
No welding can take place in a machinery space where any of the fuel storage tanks has not been cleaned to hot work standard and inspected and tested to that effect.
Next question
How can a welder, working in a confined and restricted area and in close contact with the ship’s structure, be additionally protected against the risk of electric shock through touching the hull or frames?
By providing dry insulating mats or boards.
By wearing knee length boots.
By wearing a cotton boiler suit.
By flushing down the area with fresh water before welding commences.
Next question
How might the tank lining (coating) on the bottom of a tank be protected from damage due to falling molten slag? Select all applicable answers:
By rigging fire resistant blankets.
By putting a “heel” of water in the bottom of the tank.
By inerting the tank.
By rinsing the bottom with Odourless Mineral Spirit before commencing hot work.
Next question
How should portable lights be used when illuminating an area of work?
They should be clamped or otherwise secured in position, with leads kept clear of the working area.
They should be held by hand.
They should be loosely suspended by a line, with the supply lead across the work area.
Next question
If hot work is intended for a dedicated gas safe area on the poop deck, is it necessary to perform a Risk Assessment?
Yes.
No.
Next question
If hot work is to be undertaken on a bracket under a tanker’s catwalk, at a height of 900 mm above the tank deck, what options are available for preparing cargo tanks within a 30 m radius of the hot work location to the required safety standards? The vessel is at sea. Select all applicable answers:
They should be cleaned and gas freed, with the hydrocarbon vapour content reduced to not more than 1 % LFL and maintained at that level.
They should be emptied, purged and the hydrocarbon vapour content reduced to not more than 2 % by volume and inerted.
They should be completely filled with water.
There is no requirement to prepare such compartments in any way for hot work at this height above the deck.
They should be stripped and inerted to not more than 8 % oxygen content by volume.
Next question
If hot work is to be undertaken on a catwalk support, at a height of 400 mm above the deck and directly over a cargo tank, to what equivalent standard should the safety measures be considered?
To those that would apply if the hot work was being carried out inside the tank directly below the hot work location.
To those applicable to a tank adjacent to the tank directly below the hot work location.
All such hot work tasks that take place at 300 mm or more above the deck are subject to the same safety requirements.
There are no special measures required for hot work that is more than 400 mm above the deck.
Next question
In developing their Safety Management Systems, which of the following does the ISM Code specifically encourage companies to take into account?
Applicable industry publications and guidelines.
SOLAS and MARPOL.
Manufacturer’s maintenance manuals.
Existing SMS from other companies.
Next question
In view of the potential for delayed fires resulting from the use of burning or welding apparatus, what should be done in areas considered at risk?
Checks should also be continued for at least 2 hours after the work has been completed.
The areas should be filled with a light water mist.
Nothing further is required once the hot work is completed and the equipment has been withdrawn.
The Chief Engineer should be notified.
Next question
Is a cargo tank diagonally across the point at which longitudinal and transverse tank bulkheads meet considered to be adjacent for the purposes of hot work requirements?
Yes.
No.
Next question
It is intended to burn some old brackets off a bulkhead in the after end of the machinery space. The bulkhead to a lubricating oil storage tank is 480 mm away from the closest bracket. Can the repair take place without further precautionary measures being taken?
Yes.
No.
Next question
It is intended to perform a welding repair to a bracket on a bulkhead just outside the purifier room. The bulkhead to the fuel oil settling tank is 640 mm away from the bracket. Can the repair take place?
Yes, provided a Risk Assessment has been done and all appropriate safety precautions have been taken.
No, unless the Settling Tank is cleaned to hot work standard and has been subject to an inspection and tests to verify that status.
Next question
On this tanker, a hot work repair is to be carried out at a height of 760 mm above the tank deck. The ship is not inerted. Cargo tanks within a specified distance, including those diagonally positioned, should either have been cleaned and gas freed to hot work standard, or completely filled with water. What is that specified distance?
30 metres.
100 metres.
25 metres.
50 metres.
Next question
On this tanker, a hot work repair is to take place in cargo tank 2P. Tank 3S is diagonally across the point at which longitudinal and transverse tank bulkheads of the two tanks meet. Is tank 3S considered to be adjacent for the purposes of hot work requirements?
Yes.
No.
Next question
On this tanker, preparations have been made for a damaged ladder in cargo tank 4 centre to be cut away and replaced. The tank has been thoroughly cleaned and gas freed. The vessel is at sea and all other compartments are inerted. How should the inert gas line to 4 centre be treated, before the repair can take place?
It should be purged with inert gas to not more than 2 % by volume of hydrocarbon vapour and isolated.
It should be purged with inert gas to not more than 8 % by volume of hydrocarbon vapour and isolated.
It is not necessary to do anything with the inert gas line to 4 port.
It must be flushed through and gas freed, with the hydrocarbon vapour content reduced to not more than 1 % LFL and maintained at that level.
Next question
On this tanker, preparations have been made for a damaged section of heating coil in cargo tank 2 port to be cut away and replaced. The tank has been thoroughly cleaned, gas freed and vented. All enclosed space entry procedures are in place. The vessel is at sea and all other compartments are inerted, but still contain residues. What options are there for preparing the adjacent tanks, before this repair can safely take place? Select all applicable answers:
They must be cleaned and gas freed, with the hydrocarbon vapour content reduced to not more than 1 % LFL and maintained at that level.
They must be emptied, purged and the hydrocarbon vapour content reduced to not more than 2 % by volume and inerted.
They must be completely filled with water.
It is not necessary to do anything with adjacent spaces.
Next question
Previous Safety Management Systems were compliance-based. The ISM Code has a different approach. On which of the following is it based?
Risk Assessment and Risk Management.
The completion of checklists.
The establishment of as many detailed procedures as possible, covering every operation and task on-board.
The identification of persons responsible in the event of an incident.
Next question
Prior to hot work taking place, what level should be measured in the atmosphere in a space (not a designated space), when tested for concentration of a hydrocarbon gas in air?
Less than 1 % LFL.
Less than 2 % LFL.
Less than 1 % UFL.
Less than 2 % Oxygen content.
500 mm/m3 Hydrocarbon concentrated vapour.
Next question
Some broken railings are scheduled to be welded on the tank deck. The ship is empty and partly ballasted. No cargo operations are taking place. Is it necessary to test the ballast tank adjacent to the hot work site for the presence of hydrocarbon vapours?
Yes.
No.
Next question
The bracket supporting the navigation lights on the foremast has been damaged and needs to be re-welded in place. Which of the following “permits to work” will be required before this job is started? Select all applicable answers:
A “Hot Work Permit”.
A “Permit to Work Aloft”.
An “Enclosed Space Entry” permit.
A permit to “Work over the Side”.
No permit will be required.
Next question
The ship is alongside, but is not working cargo. The vessel’s SMS allows welding in the engine room workshop without a permit, considering it a designated hot work space. The terminal regulations do not permit hot work alongside. The Chief Engineer wants to repair a small crack on a section of pipeline that has been disconnected and taken down below. Can the crack be welded? Select the most correct answer:
No (even though the SMS makes provision for it, terminal regulations take precedence).
Yes (even though terminal regulations prohibit it, the SMS takes precedence on-board).
Next question
The ship is alongside, but is not working cargo. The vessel’s SMS allows welding in the engine room workshop without a permit, considering it a designated hot work space. The terminal regulations do not permit hot work alongside. The Chief Engineer wants to repair a small crack on a section of pipeline that has been disconnected and taken down below. Can the crack be welded? Select the most correct answer:
Strictly speaking no, but it might be possible during the night.
No (even though the SMS makes provision for it, terminal regulations take precedence).
Next question
The ship is to carry out some repairs, including hot work, at a lay-by berth. Shore side contractors are to be brought in for some of this work. Why must the Risk Assessment for the intended work take special account of these contractors?
Because they will be exposed to hazards not normally encountered on shore and they may have little or no maritime experience.
Because port regulations require that any Risk Assessment requires contractors to be specifically noted.
Because SOLAS 1974 requires that special provision be made for shore side contractors working on-board vessels afloat.
Because such workers are classified as “high risk” under the ISPS Code.
Next question
The ship is to carry out some steel replacement in and around the forecastle head, following storm damage. Shore side contractors are to be brought on-board for the hot work. Why must the Risk Assessment for the intended work take special account of these contractors?
Because they will be exposed to hazards not normally encountered on shore and they may have little or no maritime experience.
Because port regulations require that any Risk Assessment requires contractors to be specifically noted.
Because SOLAS 1974 requires that special provision be made for shore side contractors working on-board vessels afloat.
Because such workers are classified as “high risk” under the ISPS Code.
Next question
The transfer and isolation of slops is a requirement in many hot work situations. Is there an alternative to this requirement, that might apply in certain circumstances and, if so, what is it?
Yes – the slops can be removed from the vessel.
No – this is an absolute requirement and there is no alternative.
Yes – the tank containing the slops can be inerted – they do not have to be moved if this is done.
Yes – the tank containing the slops can be continuously ventilated during the hot work procedure – they do not have to be moved if this is done.
Next question
Unless it is cleaned for hot work, at what minimum distance is a hot work repair permitted from the bulkhead of a bunker tank?
500 millimetres.
30 metres.
1 000 millimetres.
30 millimetres.
Next question
What approach does the ISM Code take towards safety?
It is based on Risk Assessment and Risk Management.
It requires extensive checklists to be completed at every stage.
It contains highly detailed procedures, covering all aspects of shipboard operation.
It seeks to identify persons responsible in the event of an incident.
Next question
What could be an indication of decomposing Acetylene in a gas cylinder?
A rise in temperature in the cylinder.
The flame turning green.
A hissing sound at the blowpipe tip.
“Spluttering” of the flame.
Next question
What is cold work?
Work which creates a spark by the contact of two unheated materials.
Work that will still create a spark in sub-zero temperatures.
Work that creates a cold spark.
Work which cannot create a source of ignition.
Next question
What is required before any hot work task can be commenced on-board?
A quick visual check around to make sure everything seems safe.
The completion of a form in the “Hot Work file”, so that the vessel will not fail an audit.
Only an order from a senior officer.
Careful assessment of all related hazards, and the probability of their occurrence, to determine the severity of the risks involved.
Next question
What is the definition of “cold work”?
Work which cannot create a source of ignition.
Work that creates a cold spark.
Work that will still create a spark in temperatures of less than 15,6 °C.
Work that creates a spark in water.
Work which creates a source of ignition.
An atmosphere in which no flammable vapours are present.
Next question
What is the maximum concentration of hydrocarbon gas permitted in the atmosphere in a space (not a designated space) before hot work can take place?
Less than 1 % LFL.
Less than 3 % LFL.
Less than 1 % UFL.
Less than 2 % Oxygen content.
Less than 8 % Oxygen content.
Next question
What is the “Permit to Work” designed to do?
Lead the operator through an appropriate process in a logical, detailed and responsible manner and ensure that all safety concerns raised by the risk assessment are satisfactorily addressed.
It is completed by the Responsible Person, so that the job can be started as soon as possible.
Provide a full and detailed record of a work task, including persons involved, the location, dates, times and a description of the work procedure, only for auditing purposes.
Provide proof that an adequate risk assessment has been carried out.
Next question
What should be put on the top of a gas cylinder when it is to be moved onto the ship’s main deck for hot work?
The protective cap.
A red or “high-vis” flag.
A connector.
An ID tag.
Next question
What type of boiler-suit or coveralls should be worn by a person carrying out a hot work task?
Long-sleeved, nylon.
Long-sleeved, cotton.
Short-sleeved, cotton.
Next question
When a ship is in dry-dock, which of the following primarily governs the management of all safety matters and the actions of shipyard personnel on-board the ship?
The shipboard SMS.
The shipyard SMS.
The Port Authority Safety Regulations.
SOLAS.
Next question
When a ship is in dry-dock, which of the following primarily governs the management of all safety matters?
The shipboard SMS.
The shipyard SMS.
The Port Authority Safety Regulations.
SOLAS.
The national regulations of the country in which the dry-dock is located.
Next question
When a ship is in dry-dock, who will normally carry out the testing of the atmosphere prior to entry into enclosed spaces and for hot work?
The Chief Officer.
The Shipyard chemist.
The Port Safety Officer.
The Superintendent.
Next question
When is a tank, compartment or container considered to be gas free?
When sufficient fresh air has been introduced into it to raise the level of oxygen present to that necessary to sustain human life, that is above 17,9 %.
When sufficient fresh air has been introduced into it to lower the level of any flammable, toxic or inert gas to that required for a specific purpose.
When sufficient inert gas has been introduced into it to prohibit the possibility of combustion in the presence of a source of ignition.
When a Senior Officer declares it to be fit for entry.
Next question
Where appropriate, how might a contractor’s supervisor or foreman confirm his awareness of the hazards and safety precautions required to reduce the risks to an acceptable level when undertaking a hot work task on-board ship?
By signing the formal approval relevant to the work he, or his gang, are to perform.
By verbally stating to the Responsible Officer that he has understood what is required.
By explaining the procedures to the rest of the work gang.
Next question
Where on-board should be considered as the best location for hot work?
A designated space, such as the engine room workshop.
A dedicated area, such as behind the accommodation block.
At the actual location of the required repair.
Inside a gas free cargo tank.
Anywhere within the machinery space.
Next question
Where portable lights are required to adequately illuminate a hot work site, how should they be used?
They should be clamped or otherwise secured in position, not hand-held, with leads kept clear of the working area.
They should be held by the assistant at a safe distance from the hot work, with leads kept clear of the working area.
Additional illumination from portable lights is not required; there is enough light from the hot work activity itself.
They should be suspended by natural fibre rope at a minimum distance of 2,5 metres from the hot work activity.
Next question
Wherever possible and for safety, which of the following is the most preferable location for performing a hot work repair on a cargo line valve?
In the designated space, having been disconnected and removed from the tank deck.
In position.
In a gas-free cargo tank.
On the poop deck, behind the accommodation, having been disconnected and removed from the tank deck.
Next question
Which of the following are included in the list of hot work tasks? Select all applicable answers:
Welding.
Burning.
Soldering.
Using a blow torch.
Next question
Which of the following are included in the list of hot work tasks? Select all applicable answers:
Using some power-driven tools.
Using portable electrical equipment which is not intrinsically safe.
Using portable electrical equipment that is not contained within an explosive-proof housing.
Running internal combustion engines.
Next question
Which of the following areas may need to be checked for the presence of combustible materials which may be affected by heat and sparks before any hot work is commenced? Select all applicable answers:
At the intended hot work site.
Above the work site.
Below the work site.
Adjacent to the work site.
Next question
Which of the following defines a “Risk Assessment”?
A thorough and careful analysis of what, in the range of operations, could cause harm, so that decisions can be made as to whether enough precautions have been taken, or whether more should be done to prevent harm.
A brief visual check of the work site and immediate surrounding area, carried out immediately before the commencement of work, to ensure that the area is safe and all equipment appears to be functioning correctly.
A full and detailed investigation into the circumstances which have led to an incident, such as a fire following a hot work repair.
The completion and posting of a written form, indicating the type of work, location, date and validity and bearing the signatures of the Master, Senior Officer supervising the task and the person carrying out the task.
Next question
Which of the following does the ISM Code require ship operators to do? Select all applicable answers:
Provide for safe practices in ship operation and a safe working environment.
Establish safeguards against all identified risks.
Continuously improve the safety management skills of personnel ashore and aboard ship, including preparing for emergencies related to both safety and environmental protection.
Next question
Which of the following is considered as the best location on-board for hot work?
A designated space, such as the engine room workshop.
A dedicated area, such as behind the accommodation block.
At the actual location of the required repair.
Inside a gas free compartment.
Anywhere within the machinery space.
Anywhere behind the tank deck area.
Next question
Which of the following is considered to be a “change in conditions” that will require a hot work permit to be withdrawn? Select all applicable answers:
Two men were assigned as fire watch under the work plan. One is withdrawn for bridge lookout duties before the hot work is completed.
Before commencing hot work, the explosimeter reading was nil. After a short while, a reading of 1,2 % is registered.
The hot work operator begins to feel dizzy and short of breath.
The specification of the hot work task is found to be inadequate when the site is cleaned up prior to welding. The crack is found to be much longer than first thought and runs close to an oil storage tank.
Next question
Which of the following is the ISGOTT definition of a “Responsible Officer” or “Responsible Person”?
A person appointed by the employer or the Master of the ship and empowered to take all decisions relating to a specific task, having the necessary knowledge and experience for that purpose.
A person appointed by a terminal and empowered to take all decisions relating to a vessel alongside, having the necessary knowledge and experience for that purpose.
A seafarer with a Certificate of Competency.
An Officer who has been trained how to complete standard reporting forms.
Next question
Which of the following is the definition of a “Risk Assessment”?
A thorough and careful analysis of what, in the range of operations, could cause harm, so that decisions can be made as to whether enough precautions have been taken, or whether more should be done to prevent harm.
A brief visual check of the work site carried out immediately before the work is started, to ensure that the area is safe and clean.
An investigation into the circumstances which have led to an incident, such as an explosion that occurred during a welding repair.
The full and detailed briefing of all team members involved in a work task to ensure that everyone is aware of their roles and responsibilities.
Next question
Which of the following is the definition of the Lower Explosive Limit?
Where the concentration of a hydrocarbon gas in air is below that in which there is sufficient hydrocarbon to support and propagate combustion.
Where the concentration of a hydrocarbon gas in air is above that in which there is sufficient hydrocarbon to support and propagate combustion.
Where the concentration of an ionized gas in hydrogen is below that in which there is sufficient reagent to support and propagate combustion.
The lowest level in a cargo tank to which a potential source of ignition (such as a light not contained in an explosive-proof casing) can safely be lowered without causing an explosion.
Next question
Which of the following items may be discussed at a planning meeting? Select all applicable answers:
The applicable risk assessments and their findings.
The completion and issuing of work permits.
Isolation and tagging requirements.
Next question
Which of the following items may be discussed at a planning meeting? Select all applicable answers:
Safety briefings.
“Tool-box” talks.
The procedures that will be followed in and around the task.
Next question
Which of the following regulates hot work outside the designated space?
The SMS by means of a Permit to Work system.
The SMS through the company Risk Analysis Programme.
Instructions in the Chief Engineer’s Standing Orders.
Hot work outside the designated space is not regulated.
Next question
* In some questions may be more, than one right answer.
