Final test · 30 questions

Final test: Basic electrical safety

30 questions with the explanation and the rule behind each answer. You pass with 24; if you pass, you download the PDF certificate right here.

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Missed a module? Review it first:

1. Electrical risk and the harm it causes
2. Who may do what: authorised and qualified workers
3. Equipment, sockets and extension leads without scares
4. Installation protection: earthing and the RCD
5. Working dead: the five golden rules
6. Near switchboards and power lines: danger zones
7. Water, damp, fire and static electricity
8. If someone is electrocuted, and your rights

Final test: 30 questions

Answer all 30 questions. You pass with 24 or more correct (80%). When it is marked you will see the explanation and the rule behind each answer. You can retake it as many times as you like.

1. Who does Royal Decree 614/2001 protect?Only electriciansOnly a shop's customersWorkers against electrical risk in workplaces, whether or not they are electriciansOnly people working on high voltage

Article 1 sets the minimum measures against electrical risk in workplaces.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), article 1

2. Touching the casing of a washing machine that has become live because of a fault is…A direct electrical contactAn indirect electrical contactAn electric arcStatic electricity

Indirect contact is with parts accidentally made live; direct contact is with live parts.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex I, point 1.a

3. Which of these harms does the decree include in electrical risk?Machine noiseBack injuries from carrying cablesEye strainFalls or blows caused by an electric shock or arc

Annex I includes shock, burns, falls or blows from shock or arc, and fires or explosions.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex I, point 1

4. Which live operations may any worker carry out?Elementary ones, such as connecting and disconnecting, with equipment designed for the general publicChanging fuses in an open switchboardRepairing a wall socketMeasuring the voltage in a switchboard

Article 4.3.a allows elementary operations on low voltage with equipment for use by the general public.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), article 4.3.a

5. Before an elementary operation, such as plugging in a machine, what must you do?NothingAsk for written permissionCheck the equipment is in good condition and use it as the manufacturer intendsPut on high-voltage gloves

Article 4.3.a requires the manufacturer's normal procedure and checking the equipment first.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), article 4.3.a

6. Who is an «authorised worker»?Anyone with a secondary-school certificateSomeone the employer has authorised for certain work with electrical risk because they can do it properlyWhoever has been with the company longestAnyone with an online certificate

Definition in point 13 of annex I.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex I, point 13

7. A qualified worker is an authorised worker with specialised knowledge from their training or from…Two or more years of certified experienceSix months of experienceHaving done an online courseHaving a driving licence

Point 14 of annex I: vocational or university training, or two or more years of certified experience.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex I, point 14

8. Who appoints the person in charge of the work?The co-workers, by voteThe electricity companyThe town councilThe employer, so that they take effective responsibility for the work

Point 15 of annex I.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex I, point 15

9. According to the INSST guide, what should someone who only uses electrical equipment not do?Report a broken socketUnplug equipment by pulling the cableUse equipment in good conditionFollow the manufacturer's instructions

It is one of the practices the guide says to avoid, together with using faulty cables or plugs or overloading sockets.

Source: INSST, Guía técnica para la evaluación y prevención del riesgo eléctrico (technical guide, 2020, in Spanish), comments on article 5

10. An adaptor with four power strips plugged in a chain…Is the right way to get more socketsIs only a risk at nightOverloads the socket, which the guide says to avoidIs fine if the strips are new

The guide says not to overload sockets with adaptors or power strips.

Source: INSST, Guía técnica para la evaluación y prevención del riesgo eléctrico (technical guide, 2020, in Spanish), comments on article 5

11. A class II appliance…Always needs an earth connectionOnly runs on batteriesCan only be used outdoorsHas double insulation and needs no earth connection

The guide's table: class II has supplementary protective insulation and no earthing.

Source: INSST, Guía técnica para la evaluación y prevención del riesgo eléctrico (technical guide, 2020, in Spanish), comments on article 3, appliance classes

12. What must be done with a class I appliance?Nothing specialOnly use it wetPlug it into an earthed socketRemove its earth pin

Class I provides for an earth connection through a protective conductor.

Source: INSST, Guía técnica para la evaluación y prevención del riesgo eléctrico (technical guide, 2020, in Spanish), comments on article 3, appliance classes

13. Which equipment may be used in a workplace?Equipment whose protection is compatible with the installation and the conditions of the placeAnything that worksOnly equipment over 10 years oldThe cheapest

Article 3.2 expressly requires it.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), article 3.2

14. According to the INSST guide, against direct contact the RCD is…The only protection neededAdditional protectionA forbidden protectionA device for measuring voltage

Table 1 of the guide: against direct contact, the RCD complements insulation, enclosures and distance.

Source: INSST, Guía técnica para la evaluación y prevención del riesgo eléctrico (technical guide, 2020, in Spanish), comments on article 3, table 1

15. May a user check that the RCD works?No, neverYes, by opening the switchboard with a screwdriverOnly an engineerYes, if they do not have to open a switchboard with live parts within reach

The guide allows users to do it if it does not involve opening a switchboard with accessible live parts.

Source: INSST, Guía técnica para la evaluación y prevención del riesgo eléctrico (technical guide, 2020, in Spanish), comments on article 2

16. How often are an installation's protections checked?Only after an accidentPeriodically, following the manufacturers' and installers' instructionsNever, if the installation is newOnly every 30 years

Article 3.3 requires periodic checks of how the protection systems work.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), article 3.3

17. What is the general rule for working on an electrical installation?Work with the power off, except for the decree's exceptionsAlways work live to go fasterWork dead only in summerIt does not matter if you wear gloves

Article 4.2: all work with electrical risk is done dead, except in the cases of sections 3 and 4.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), article 4.2

18. What is the first of the five golden rules?EarthMark out the areaDisconnectVerify there is no voltage

In order: disconnect, prevent reconnection, verify there is no voltage, earth and short-circuit, and protect and mark out.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex II, part A.1

19. What is the second rule, preventing reconnection, for?So nobody reconnects the installation by mistake, by locking and signing the switchTo measure the voltageTo save electricityTo trip the RCD

Switching devices are secured against reconnection, preferably by locking, and signed.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex II, part A.1, point 2

20. When can work with the power off begin?As soon as the switch is turned offWhen all five steps are complete; until then, the installation is treated as liveWhen any co-worker says soAfter the first step

Until the five steps are completed, the start is not authorised and the affected part is treated as live.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex II, part A.1

21. Who carries out the operations to isolate a low-voltage installation?Any workerA customerAuthorised workersOnly the company owner

Annex II.A: authorised workers, and qualified ones on high voltage.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex II, part A

22. What is the danger zone?The whole buildingOnly the inside of a closed switchboardThe noisy areaThe space around a live part where an unprotected worker may suffer an arc or a contact

Definition in point 7 of annex I.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex I, point 7

23. On low voltage (up to 1 kV), how far does the danger zone reach?5 cm50 cm3 m10 m

Table 1 of annex I: 50 cm for voltages up to 1 kV.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex I, table 1

24. If the work area next to a 132 kV line cannot be marked out precisely, what proximity limit does table 1 give?5 m50 cm1 m20 m

Table 1, DPROX-2 column: 300 cm up to 66 kV, 500 cm from 110 to 220 kV and 700 cm at 380 kV.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex I, table 1 · INSST, Guía técnica para la evaluación y prevención del riesgo eléctrico (technical guide, 2020, in Spanish), comments on annex V

25. Who may open electrical cells, cabinets and switchboards?Any worker with a screwdriverCleaning staff, to clean themOnly authorised workersAnyone wearing gloves

Part B.1 of annex V restricts the opening of enclosures to authorised workers.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex V, part B.1

26. Which of these increases the risk near an overhead line, according to the guide?A hard hatA high-visibility vestSafety bootsA ladder or metal scaffolding

Table 5 of the guide lists cranes, platforms, ladders, metal scaffolding, metal pipes and profiles, cables, branches…

Source: INSST, Guía técnica para la evaluación y prevención del riesgo eléctrico (technical guide, 2020, in Spanish), comments on annex V, table 5

27. Which factor of the place greatly increases electrical risk?Water or dampA dry wooden floorDaylightA morning shift

Article 3.1 mentions highly conductive surfaces, water or damp, explosive atmospheres, etc.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), article 3.1

28. Where there may be an explosive atmosphere, changing a lamp while live…Is always allowedIs only forbidden at nightIs forbidden, unless installations and equipment designed for those conditions are usedIs allowed if there is ventilation

Annex VI.A forbids live work or operations (changing lamps, fuses, etc.) in those conditions.

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex VI, part A

29. A co-worker is stuck to a machine giving off current. What comes first?Pull them off with your handsCut the powerThrow water on themWait for them to let go

The first aid poster: cut the power and, if they must be separated, always with insulating objects or clothing.

Source: Basque Government, Osakidetza and 112 SOS Deiak: «Primeros auxilios» poster (first aid, in Spanish), electrocution

30. You are asked to open the switchboard and you are not authorised. What do you do?You open it carefullyYou open it if nobody is lookingYou ask a customer to do itYou do not open it and you tell your supervisor

Opening enclosures is for authorised workers (annex V, B.1) and you must report any risk (Act 31/1995, art. 29).

Source: Real Decreto 614/2001, sobre protección frente al riesgo eléctrico (Royal Decree on protection against electrical risk; consolidated text, in Spanish), annex V, part B.1 · Ley 31/1995, de Prevención de Riesgos Laborales (Occupational Risk Prevention Act, in Spanish), article 29.2.4

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This is a free-form theoretical training certificate. It is not an electrician's licence and does not make you an authorised or qualified worker: your employer decides that based on your training and experience (Royal Decree 614/2001, annex I, points 13 and 14).

Next step: what to do if it happens

Cutting the power is the first step; then you need to know how to check the person, the recovery position and CPR. The first aid at work course explains it with the INSST guide.

Free course: First aid at work8 modules · 30 questions→

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Final test: Basic electrical safety

Final test: 30 questions

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