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Heim Online-Tests Mintra Working with High Voltage (Mintra)
Online-Test: Working with High Voltage (Mintra)
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What are the three phases of risk evaluation?
Preliminary phase, planning phase and execution phase.
Precautionary phase, executive phase and evacuation phase.
Can the “Dead working” method be applied if there is a danger of coming into contact with live parts?
Yes, but only if the live parts can be de-energised and protected against accidental re-energising or shrouded.
No, in such cases we must always choose an alternative working method.
Live working presents little risk if undertaken by a person with the correct competence.
False.
True.
The Regulations require that everyone working on, or in the vicinity of, electrical installations, undertakes safety training.
True.
False.
Who is responsible for removing safety measures on high voltage installations?
The crew member who carried out the work.
The Chief Engineer.
The The Master.
What is the purpose of a single-line diagram?
To provide necessary information about the installation’s lay-out.
To provide an overview of the installation’s fuse layout.
To provide description of the work that is to be performed.
What must you do if there is anything that you are unsure about before starting the work?
Obtain clarification.
Choose a different working method.
Proceed anyway, but exercise extra caution.
A barrier can reduce the probability of an undesirable event occurring or its consequences.
True.
False.
Which of the following items is considered personal protective equipment?
Insulated gloves.
Insulated tools.
Insulated floor-mats.
When working on electrical installations, it is important that hearing protection has a metal head-band.
False.
True.
Which of the following is the correct definition of the term “high voltage”?
Voltage which normally exceeds 1 000 V alternating current (AC) or 1 500 V direct current (DC).
Voltage which normally exceeds 500 V alternating current (AC) or 1 000 V direct current (DC).
Voltage which normally exceeds 100 V alternating current (AC) or 150 V direct current (DC).
What is the purpose of the Regulations?
To maintain a high level of safety during operation and work on, or in the vicinity of, electrical installations by requiring that all activities are adequately planned and the necessary safety precautions are put in place.
To prescribe the work activities that may be carried out on or in the vicinity of electrical installations.
To ensure that ship owners are held accountable for any accidents or incidents that occur onboard their vessels.
The definition below describes which of the following terms? “Equipment that gives protection against direct contact from any usual approach or access point”.
Shrouding.
Safety switching.
Earthing.
Is work on “partly de-energised” installations within the framework of the Regulations?
Yes.
No.
Which of the following statements about portable earthing devices is true?
The earth connection must be established before it is connected to the installation.
You must connect the device to the installation that is to be earthed before establishing the connection to earth.
Which of the following safety barriers are required for “live working”?
l) Installation protection; ll) Protection against accidental re-energising.
l) Distances; ll) Personal protective equipment.
l) Personal protective equipment; ll) Installation protection.
Why is it so dangerous for an electronic current to pass from hand to hand or hand to foot?
Because much of the current will pass through the heart.
Because much of the current will pass through the brain.
Because much of the current will pass through the liver.
What is the first thing you should do if you find a person trapped in a live installation?
Call 113.
Turn off the main switch and separate the person from the live circuit using an object that does not conduct electricity.
Check their breathing and look for burns.
What do the different categories of insulated gloves determine?
The voltages they may be used with.
Which external influences (such as acid or low temperature for example) they may be used.
How durable the gloves are.
In which of the following circumstances does the two-person requirement apply?
Antwort
Live working is more dangerous than dead working.
True.
False.
Voltage testing must be performed in such a manner that it never entails danger to the life or health of the person performing the check.
True.
False.
What is temporary earthing for work?
Earthing and short-circuiting of installation parts with a less than fully dimensioned earthing device on or in close proximity to the work location.
Fully dimensioned earthing and short-circuiting of all isolation points from which an installation may be energised.
Fully dimensioned earthing and short-circuiting of installation parts where work is being conducted.
Which of the following working methods requires control measurements be taken to ensure that the installation is de-energised?
Dead working.
Live working.
Working in the vicinity of live parts.
Do crew members require training in the use of live working equipment to perform live work on low voltage installations?
Yes.
No.
Which of the following safety barriers are required when working in the vicinity of live parts on a high-voltage installation?
l) Distances; ll) Personal protective equipment.
l) Safe distances; ll) Installation protection.
l) Personal protective equipment; ll) Installation protection.
What is the first thing you must do when removing safety measures?
Notify the work team that the job has been completed and no further work is allowed.
Leave the work location.
Remove obstacles to re-energising.
Who is responsible for reporting accidents involving personal injury caused by electricity?
The Master or the Shipowner.
The injured person.
The Safety Supervisor.
Are risk evaluations and the choice of working method integral parts of planning a job?
Yes.
No.
Which of the following statements about earthing sticks is true?
An earthing stick is an insulated rod that can be used to attach phase clamps to the part of the installation that is to be earthed and short-circuited.
An earthing stick can be used within the live working zone and can come into direct contact with live parts.
An earthing stick can be used as a hot stick.
Which of the following statements about insulated tools is true?
Hand-insulated tools only have protection on the handle/grip while the ‘business-end’ is not insulated.
Operationally insulated tools only have protection on the handle/grip while the “business-end” is insulated.
During maintenance, is deviation from the two-barrier requirement ever allowed?
No, never.
Yes, but only if the requirement cannot be fulfilled in practice and there is a procedure that helps ensure personal safety.
Yes, as long as four crew members are working on the job.
Installations which are not protected from direct contact must be locked and the keys only made available to which of the following?
Access-permit holders.
The vessel owner.
All crew.
Before using an electrically insulated helmet, you should always examine it for damage.
True.
False.
Who usually performs the risk evaluation before work in a high voltage installation?
The Chief Engineer.
The Master.
The Officer of the Watch.
Which of the following safety barriers are required when using the “dead working” method?
I) De-energising and voltage testing; ll) Protection against accidental re-energising.
I) De-energising and voltage testing; ll) Personal protective equipment.
I) Protection against de-energising; ll) Installation protection.
What does the class of an electrically insulated helmet determine?
The test voltage that the helmet tolerates and the nominal voltage at which it can be used.
It’s size.
I) When it must be replaced.
The degree to which tools must be insulated and the necessary extent of the use of protective shielding must be evaluated in combination with the personal protective equipment used for each job.
True.
False.
When disconnecting an electrical installation using isolation switches – why must the switches have visible isolation points or a reliable indicator.
So that it is simple to carry out a reliable check of the disconnection.
So that the switches can be easily turned back.
What is the purpose of security cards for high voltage installations?
To document who has access to high voltage installations.
To document who has performed work high voltage installations.
To document who has visited the vessel.
Этот тест оценивает знания и навыки безопасной работы с высоковольтными системами на судне.
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