Practice -ECS Electrotechnical

1.

In accordance with the Electricity at Work regulations, when considering whether to work live a responsible person should:

Carry out a risk assessment.

Only work dead.

Only work live.

Do as the client demands.

2.

The normal procedure for working on electrical equipment should be which one of the following?

Dead working.

Wearing insulated gloves.

Using insulated tools.

Live working.

3.

Test instruments used for working on electrical systems should:

Be yellow in colour.

Be less than 10 years old.

Have non-insulated test probes.

Have insulated test probes.

4.

Under the Electricity at Work Regulations, live working is considered:

As entirely acceptable.

To be normally permitted.

Only to be allowed in exceptional circumstances.

Never to be allowed.

5.

Which of the following would you use to replace the fuse in a plug if fuses were NOT available?

A nail.

A piece of silver paper.

A bit of wire.

None of the options listed.

6.

To prove a circuit or equipment is dead after isolation what is the FIRST activity in the sequence of events?

Make sure equipment is not working.

Check between line and earth.

Check that the voltage detector is working on a proving device, known live source or inbuilt test feature.

Check between line and neutral.

7.

The nominal single phase voltage in the UK is?

230 volts.

240 volts.

415 volts.

400 volts.

8.

When is live working permissible?

When the person carrying out the work is a competent person.

When it is unreasonable in all circumstances for the equipment to be made dead and suitable precautions are taken.

When the means of isolation cannot be identified.

When the person working on the equipment is wearing rubber gloves.

9.

Which of the following is not a requirement of low voltage safe isolation practice?

Ensuring that the correct point of isolation is identified.

The person carrying out the work is issued with insulating gloves.

A caution notice should be applied at the point of isolation.

The conductors are proved to be dead at the point of work.

10.

The specific effects on the human body of a major electric shock are one of the following:

Dermatitis.

Burns and cardiac arrest.

Broken bones.

Chest pains.

11.

The lowest level of electrical current which can harm the human body is normally measured in:

Microamps.

Kiloamps.

Amps.

Milliamps.

12.

With regard to the effect of electrical current on the human body, one of the following is correct:

a 6 amp circuit breaker should prevent a person receiving a fatal electric shock.

a 3 amp fuse should prevent a person receiving a fatal electric shock.

a 30mA Residual Current Device (RCD) should prevent a person receiving a fatal electric shock.

a 5 amp rewireable fuse should prevent a person receiving a fatal electric shock.

13.

Where mains voltage is used to supply portable equipment on a construction site, what additional protection is required?

Step-down transformer.

Step-down generator.

Cable avoidance tool.

Residual current device (RCD).

14.

What colour cable USUALLY signifies 110 volt power supply on site?

Black.

Red.

Blue.

Yellow.

15.

A portable electric generator on site has two power outlets, 1o volts and 230 volts. What colour would the 110 volt outlet be?

Black.

Yellow.

Red.

Blue.

16.

Where there is no local means of isolation for equipment or circuits to be worked on, which of the following is the preferred method of isolation?

Isolation of the main switch or DB switch-disconnector.

Isolation of the individual circuit breaker or fuse.

Pulling out the distributor’s cut-out fuse.

Disconnecting the individual circuit from the DB.

17.

What action should you take if a workmate gets an electric shock?

Phone the electricity board immediately.

Dial 999 and ask for the fire brigade.

Cut off the power and call for help.

Try to pull them to safety.

18.

A residual current device is designed to operate in the event of one of the following:

Overload.

Earth fault.

Lightning strike on the supply..

Short-circuit.

19.

Electrical installations on construction sites should be periodically inspected and tested:

Every 3 months.

Every year.

Every 6 months.

Every month.

20.

The maximum AC voltage which the human body can withstand without long term physiological effects in dry conditions is:

110 volts.

230 volts.

50 volts.

400 volts.

21.

Which of the following statements is true with regard to the dangers of electricity?

Electricity is perfectly safe so long as you wear cotton gloves.

Electricity is only dangerous if you are not wearing wellington boots.

Electricity is only dangerous in wet weather.

Electricity is dangerous at any time because you cannot tell by looking at a cable whether or not it is live.

22.

What is the most serious effect that electric shock can have if you come into contact with a live part?

The electric current can cause a slight tingling in the fingers.

The electric current can cause burn marks on the fingers.

The electric current can cause the heart to stop, resulting in death.

The electric current can cause the finger muscles to twitch.

23.

Your job involves you working near to hanging electrical cables which have bare ends. What should you do?

Touch the cables to see if they are live.

Carry on working, as there shouldn’t be a problemn.

Inform your supervisor and keep well away.

Attempt to push the cables back into the ceiling void so that you can start work.

24.

For all live working activities it is necessary to:

Carry out a risk assessment as required by the EAW Regulations.

Wear rubber gloves only.

Be accompanied.

Keep your fingers crossed.

25.

An electrical Permit to Work is primarily a statement that:

Someone else has taken responsibility for the work.

The circuit or equipment is live.

Certain instructions need to be followed.

The circuit or equipment has been isolated and is safe to work on.

26.

The probes of voltage detectors and test instruments used on electrical systems should be:

Manufactured in the UK.

Accompanied by a calibration certificate.

Shaped or have barriers to prevent finger contact with the tips.

Coloured red.

27.

Which of the following does the Electricity at Work (EAW) regulations apply to?

All persons engaged for work purposes.

Self employed persons only.

Employees only.

Employers only.

28.

The Electricity at Work Regulations require that:

Persons working with electricity must have the appropriate level of knowledge and experience.

A training course is necessary before anyone can work with electricity.

Only electricians can work with electricity.

Anyone supervised can work with electricity.

29.

The Electricity at Work Regulations apply to:

Only low voltage systems.

Only extra-low voltage systems.

All voltage systems.

Only high voltage systems.

30.

Which of the following should be used to prove a circuit or equipment is dead after isolation?

A lamp holder with a length of flex attached.

A proprietary test lamp or two-pole voltage detector.

A voltage stick.

A multimeter.

31.

Which of the following is not a suitable means of isolating a circuit?

Removing a fuse and locking the distribution board.

Putting insulating tape over the circuit breaker.

Padlocking the isolating switch.

Fitting a padlocked circuit breaker lockout.

32.

Which of the following work procedures on electrical systems will always require a permit-to-work to be Issued?

Dead working on low-voltage systems.

Live working on low-voltage systems.

Dead working on high-voltage systems.

Live working on high-voltage systems.

33.

Optical fibre cable remnants should not be left lying around on site because:

They can be hot and burn upon contact.

Laser bearns still exist in the cut pieces.

They can pierce the skin or eyes.

They are toxic.

34.

Why should the end of an optical fibre cable never be pointed towards your own or anyone else’s eyes?

The beam can transfer a strong electric current.

The colour of the beam is very hypnotic.

The beam can bore a hole through the skin.

The beam can damage the eyes.

35.

The use of a multi-lock hasp with the appropriate number of padlocks is a recommended method of safe isolation where:

Individual circuit breaker locking off devices are not available.

Individual circuit breakers are not identified at the distribution board.

More than one person will be working on circuits supplied from the same distribution board.

You know the health and safety inspector is in the area.

36.

Which of the following procedures should be used when more than one person will be working on circuits supplied from a distribution board which has been switched off?

The use of a multi-lock hasp on the isolator with a padlock for each operative.

Blowing a horn before the power is switched on again.

Giving each operative a volt stick.

Telling everyone what time the power will be switched on again.

Practice -ECS Electrotechnical

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