CSCS Electrical Safety Mock Test

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HS&E TEST

Electrical Safety and Tools

1 / 43

What should be done before adjusting an electric hand tool?

Put tape over the power switch before adjusting

You should never adjust an electric hand tool yourself

Switch it off and remove the plug from the socket

Switch it off but leave the plug in the socket

2 / 43

Which requirement must be met before operating a power tool?

You must be trained and competent

You must have a gold CSCS card

You must be over 18 years old

You must only operate it when your supervisor is present

3 / 43

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

Carry on working in the dark

Disconnect the lighting from the generator before replacing the lamp

Wait for a fully qualified electrician with a NICEIC card

Replace the lamp without disconnecting the generator

4 / 43

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

Inside the main transformer

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

Near to the main fuse box

Anywhere in the 230 volt supply to the building

5 / 43

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

An electric shock

Hand-arm vibration

Being struck by a poorly secured hose

Airborne dust and flying fragments

Radiation

6 / 43

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

Shake it to see if it will start again

Pull the electric cable to see if it is loose

Switch off the power and look for signs of damage

Switch the power off and on a few times

7 / 43

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

They will not give you a serious electric shock

They are cheaper to run

They do not need to be tested or serviced

They will not give you hand-arm vibration

8 / 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

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

Press the test button on the RCD

Use a hand-held RCD test meter

9 / 43

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

Run the cable by the shortest route

Cover the cable with yellow tape

Run the cable above head height

Cover the cable with pieces of wood

10 / 43

How do residual current devices (RCDs) work?

Giving an audible warning

By cutting power quickly if there is a fault

By showing a flashing light

By storing electric charge

11 / 43

What colour is a 110 volt power cable and connector?

Yellow

Red

Black

Blue

12 / 43

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

It moves faster along the cables

It is safer for the environment

It is less likely to kill you

It is cheaper

13 / 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?

Dig the hole without using the cable avoidance tool

Tell your supervisor that you haven't been trained

Read the manual before you start work

Ask a colleague to show you how to use it

14 / 43

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

Plug in portable halogen light

Battery-powered rechargeable drill

110 volt transformer

110 volt extension lead

15 / 43

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

They are heavy and could cause manual handling injuries

They have exposed electrical parts

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

They can cause dermatitis when used for long periods

16 / 43

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

To give you a firm handhold

To stop materials getting onto the blade or wheel

To stop fragments flying into the air

To balance the machine

To stop you coming into contact with the blade or wheel

17 / 43

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

Every day

Once a week

At least once a year

Each time before use

18 / 43

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

110 volts

24 volts

12 volts

230 volts

19 / 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

You must not use it unless your supervisor is present

Only supervisors can use it until further notice

You must not use it until it is made safe

20 / 43

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

110 volt transformer

Hammer and bolster

110 volt extension lead

Plug-in breaker

21 / 43

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

If it is not raining whilst you are working

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

If the power is switched off

If you use a wooden ladder for access

22 / 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

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

Put a bigger fuse in the cable plug

Put electrical tape around the damaged part

23 / 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 made

Who tested the tool before it left the factory

The tool's earth-loop impedance

When the tool was last tested

24 / 43

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

Cover the cable with a protective ramp

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

Run the cable at head height

Put up a sign that says 'Ramp ahead'

Cover the cable with scaffold boards

25 / 43

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

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

Find another heavy tool to use instead of the hammer

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

Stop work and get the hammer repaired or replaced

26 / 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

No emergency procedures defined

There is no supervisor

Safety shoes not okay

27 / 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 is inspected at the start of each week

That it was bought from a builders' merchant

That it was made in the UK

That it is inspected before you use it

28 / 43

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

The safety guard cannot be used

The motor could burst into flames

The wheel could shatter into many pieces

The wheel will get clogged and stop

29 / 43

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

Make sure the carry case isn't broken

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

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

Check it is marked with a security stamp

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

30 / 43

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

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

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

31 / 43

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

Use the tool but try to work quickly

Use the tool but work carefully and slowly

Try to make another guard

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

32 / 43

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

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

Remove the guard so that you can clearly see the blade

Adjust the guard to expose the maximum amount of blade

Remove the guard but wear leather gloves to protect your hands

33 / 43

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

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

The tool bag will be heavy and could damage your back

34 / 43

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

Only if someone else has borrowed the tools

No, it is not necessary to check such tools

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

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

35 / 43

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

Only use thinner 230 volt extension cables

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

Keep trailing cables and leads close to the wall

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

Make sure your cables have not been used before

36 / 43

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

You must be trained and competent to use any power tool

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

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

A power tool should be unplugged by pulling its cord

You should always carry the tool by its cord

37 / 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?

Vibration white finger

Harmful dust in the air

Flying fragments

Contact dermatitis

High noise levels

38 / 43

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

Quickly touch the cable to see if it is live

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

Tell your supervisor and keep well away from the cable

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

39 / 43

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

It quickly cuts off the power if there is a fault

It lowers the voltage automatically

It makes the tool run at a safe speed

It saves energy and lowers costs

40 / 43

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

Check the whole cable and connectors for damage

Uncoil the whole cable

Only uncoil the length of cable you need

Only check the part of the cable you need for damage

Clean the cable with a damp cloth

41 / 43

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

Use a portable residual current device (RCD)

Put up safety screens around you

Wear rubber boots and gloves

Use a generator which has been serviced

42 / 43

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

They are quieter

They are more powerful

They are cheaper to run

They are safer

43 / 43

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

Before each use

Monthly

If not used for week or more

Daily

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The average score is 66%

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CSCS Electrical Safety Mock Test

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