CSCS Electrical Safety Mock Test

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HS&E TEST

Electrical Safety and Tools

1 / 43

Residual current devices (RCDs) should have a mechanical (trip) test at which intervals?

Monthly

Daily

If not used for week or more

Before each use

2 / 43

What is the main danger when using a chisel or bolster with a mushroomed head?

You are more likely to hit your hand with the chise head

The hammer could slip off the head of the bolsters or chisel

It will shatter and send fragments flying into the air

The shaft of the chisel will bend, putting a strain on your wrist

3 / 43

Why are battery-powered tools preferred over 110 volt tools in a construction environment?

They are more powerful

They are quieter

They are cheaper to run

They are safer

4 / 43

You have been asked to use a hand tool or power tool on site. You know that it is the right tool for the job. What else must you check?

That it was made in the UK

That it is inspected at the start of each week

That it was bought from a builders' merchant

That it is inspected before you use it

5 / 43

How do residual current devices (RCDs) work?

By showing a flashing light

By storing electric charge

By cutting power quickly if there is a fault

Giving an audible warning

6 / 43

What two things should you do to reduce trips and injuries caused by untidy leads and extension cables?

Run cables and leads above head height and over the top of doorways and walkways

Tie any excess cables and leads up into the smallest coil possible

Make sure your cables have not been used before

Only use thinner 230 volt extension cables

Keep trailing cables and leads close to the wall

7 / 43

What should you do if the electrical equipment you are using cuts out?

Switch the power off and on a few times

Switch off the power and look for signs of damage

Shake it to see if it will start again

Pull the electric cable to see if it is loose

8 / 43

What are the two main visual inspections you should carry out before using a power tool?

Check it is marked with a security stamp

Make sure the manufacturer's label hasn't come off

Make sure the carry case isn't broken

Check switches, triggers and make sure the guard are adjusted and work correctly

Check the power lead, plug and casing are in good condition

9 / 43

What does it mean if the equipment you are using is issued with a prohibition notice?

You can use it as long as you take more care

Only supervisors can use it until further notice

You must not use it unless your supervisor is present

You must not use it until it is made safe

10 / 43

Why should a residual current device (RCD) be used with 230 volt tools?

It lowers the voltage automatically

It quickly cuts off the power if there is a fault

It makes the tool run at a safe speed

It saves energy and lowers costs

11 / 43

What should be done before adjusting an electric hand tool?

Put tape over the power switch before adjusting

Switch it off but leave the plug in the socket

You should never adjust an electric hand tool yourself

Switch it off and remove the plug from the socket

12 / 43

What is the main advantage of using battery-powered tools rather than electrical ones?

They will not give you hand-arm vibration

They do not need to be tested or serviced

They will not give you a serious electric shock

They are cheaper to run

13 / 43

Why is it considered poor practice to store batteries loose in a tool bag?

The tool bag will be heavy and could damage your back

You might forget to charge them

If the terminals short out, they could cause a fire

They give off a poisonous gas in a confined space

14 / 43

What two things should you do if you need to run an electrical cable across an area used by vehicles?

Wrap the cable in yellow tape so that drivers can see it

Run the cable at head height

Cover the cable with scaffold boards

Put up a sign that says 'Ramp ahead'

Cover the cable with a protective ramp

15 / 43

What should you do if the guard is missing from a power tool?

Use the tool but work carefully and slowly

Do not use the tool until a proper guard has been fitted

Try to make another guard

Use the tool but try to work quickly

16 / 43

Which item of equipment would not require portable appliance testing (PAT)?

110 volt extension lead

Battery-powered rechargeable drill

Plug in portable halogen light

110 volt transformer

17 / 43

What is best practice when using a power tool with a rotating blade?

Remove the guard but wear leather gloves to protect your hands

Adjust the guard to expose just enough blade to let you do the job

Adjust the guard to expose the maximum amount of blade

Remove the guard so that you can clearly see the blade

18 / 43

You are using a generator to power some lighting when a lamp blows. You have a spare lamp. What should you do?

Wait for a fully qualified electrician with a NICEIC card

Replace the lamp without disconnecting the generator

Disconnect the lighting from the generator before replacing the lamp

Carry on working in the dark

19 / 43

You have been asked to dig to expose power cables. You have been given a cable avoidance tool (CAT) to detect them but you haven't been shown how to use it. What should you do?

Tell your supervisor that you haven't been trained

Dig the hole without using the cable avoidance tool

Read the manual before you start work

Ask a colleague to show you how to use it

20 / 43

You need to use an air-powered tool. What three hazards are likely to affect you?

Radiation

An electric shock

Hand-arm vibration

Being struck by a poorly secured hose

Airborne dust and flying fragments

21 / 43

Where is the best place for a portable residual current device (RCD) to be fitted?

Near to the main fuse box

Anywhere in the 230 volt supply to the building

Between the plug of a 230 volt tool and the supply socket

Inside the main transformer

22 / 43

When is it safe to work close to an overhead power line?

If the power is switched off

If you use a wooden ladder for access

If you do not touch the line for more than 30 seconds

If it is not raining whilst you are working

23 / 43

Apart from dust, vibration, noise and flying fragments, identify another significant hazard in this image.

Electrical wire can stuck in feet, which may lead to an accident

There is no supervisor

No emergency procedures defined

Safety shoes not okay

24 / 43

Why do building sites use a 110 volt electricity supply instead of a 230 volt supply?

It is less likely to kill you

It is cheaper

It moves faster along the cables

It is safer for the environment

25 / 43

Which method is used to check if a residual current device (RCD) connected to a power tool is working?

Switch the tool on and off

Press the test button on the RCD

Run the tool at top speed to see if it cuts out

Use a hand-held RCD test meter

26 / 43

You need to work near an electric cable but the cable has bare wires. What should you do?

Tell your supervisor and keep well away from the cable

Check there are no sparks coming from the cable and then start work

Push the cable out of the way so that you can start work

Quickly touch the cable to see if it is live

27 / 43

Which two of the following statements about power tools are true?

You should always carry the tool by its cord

A power tool should be unplugged by pulling its cord

You should always unplug the tool when you are not using it

You must be trained and competent to use any power tool

Power tools should always be left plugged in when you check or adjust them

28 / 43

What is the best way to protect an extension cable and also reduce trip hazards?

Run the cable above head height

Cover the cable with pieces of wood

Run the cable by the shortest route

Cover the cable with yellow tape

29 / 43

When do you need to check tools and equipment for damage?

Each time before use

Every day

Once a week

At least once a year

30 / 43

What colour is a 110 volt power cable and connector?

Red

Yellow

Black

Blue

31 / 43

If a power tool has a portable appliance testing (PAT) label on it, what information should be included on the label?

When the tool was last tested

Who tested the tool before it left the factory

The tool's earth-loop impedance

When the tool was made

32 / 43

Which item of equipment would not require portable appliance testing (PAT)?

110 volt extension lead

Hammer and bolster

110 volt transformer

Plug-in breaker

33 / 43

You need to use a 230 volt item of equipment. How should you protect yourself from an electric shock?

Use a generator which has been serviced

Put up safety screens around you

Wear rubber boots and gloves

Use a portable residual current device (RCD)

34 / 43

What should you do if the head on your hammer becomes loose?

Keep using it but be aware that the head could come off at any time

Tell the other people near you to keep out of the way

Stop work and get the hammer repaired or replaced

Find another heavy tool to use instead of the hammer

35 / 43

What are the two main functions of the guards on cutting and grinding machines?

To stop you coming into contact with the blade or wheel

To stop materials getting onto the blade or wheel

To balance the machine

To stop fragments flying into the air

To give you a firm handhold

36 / 43

Do simple hand tools like trowels, screwdrivers, saws and hammers need to be inspected?

No, it is not necessary to check such tools

Yes, the tools should be checked each time they are used

Only if someone else has borrowed the tools

Only if the tools have not been used for a few weeks

37 / 43

What two things should you do if you need to use an extension cable?

Only uncoil the length of cable you need

Clean the cable with a damp cloth

Uncoil the whole cable

Check the whole cable and connectors for damage

Only check the part of the cable you need for damage

38 / 43

What should you do if an extension cable has a cut in its outer cover?

Report the fault and make sure that no one else uses the cable

Put electrical tape around the damaged part

Check the copper wires aren't showing in the cut and then use the cable

Put a bigger fuse in the cable plug

39 / 43

Why is it essential to be fully trained before using a cartridge-operated tool?

They operate like a gun and can be dangerous in inexperienced hands

They have exposed electrical parts

They are heavy and could cause manual handling injuries

They can cause dermatitis when used for long periods

40 / 43

What is the recommended maximum voltage for electrical equipment on construction sites?

24 volts

12 volts

110 volts

230 volts

41 / 43

Which requirement must be met before operating a power tool?

You must have a gold CSCS card

You must be over 18 years old

You must only operate it when your supervisor is present

You must be trained and competent

42 / 43

Why is it dangerous to run an abrasive wheel faster than its recommended maximum speed?

The wheel could shatter into many pieces

The wheel will get clogged and stop

The safety guard cannot be used

The motor could burst into flames

43 / 43

If someone near you is using a petrol cut-off saw (disc cutter) to cut concrete blocks, what three immediate hazards are likely to affect you?

Harmful dust in the air

Flying fragments

Contact dermatitis

Vibration white finger

High noise levels

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The average score is 99%

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CSCS Electrical Safety Mock Test

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