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NETK3-04

Total questions: 33

Worksheet time: 33mins

Name
Class
Date
1.

The statutory regulations that set standards which are intended to reduce the risk of electric shock, burns and fire, due to the use of electrical systems, are the:

a)

Electricity at Work Regulations

b)

IEE Wiring Regulations

c)

Personal Protective Equipment Regulations

d)

Health and Safety at Work Act.

2.

Specific guidance is given to the selection of cables, isolation, switching, and inspection and testing for electrical installations in the: ________

a)

Health and Safety at Work Act

b)

Electricity at Work Regulations

c)

Electricity Supply Regulations

d)

IET Wiring Regulations.

3.

In high rise buildings lightning conductors must be bonded to the:

a)

building girder work

b)

water and gas supplies

c)

the installation earth

d)

earthing rod.

4.

BS EN numbers relating to electrical equipment signifies compliance with British and:

a)

International standards

b)

European standards

c)

English standards

d)

Insulation standards.

5.

Exploded views in manufacturers’ manuals are generally used to show:

a)

large machine parts

b)

machines having few parts

c)

wiring diagrams of machines and systems

d)

complex components having many parts.

6.

An electrical contractor, compiling a list of materials and equipment required to complete an installation, will need access to:

a)

delivery records

b)

drawings and specifications

c)

circuit diagrams

d)

day work sheets and variations.

7.

A line on a drawing measuring 200mm, representing a wall on a site measuring 200m will be drawn to a scale of:

a)

1:500

b)

1:1000

c)

1000:1

d)

500:1.

8.

Where two-way switches are used as part of a lighting circuit, these switches will provide, in accordance to BS 7671:

a)

emergency switching

b)

isolation

c)

mechanical maintenance

d)

functional switching.

9.

Circuits that are used to measure and control temperature, air flow and humidity in a building are called:

a)

emergency management circuits

b)

environmental control circuits

c)

power control circuits

d)

security con.

10.

Which of the following wiring systems allow for easy replacement and addition of cables?

a)

PVC conduit

b)

steel-wire-armoured cable

c)

mineral insulated cable

d)

metallic cable trunking.

11.

In an installation where appearance is the most important consideration, the most likely choice of a wiring system will be:

a)

ladder racking

b)

mineral insulated cable

c)

steel-wired-armoured cable

d)

metallic, perforated cable tray.

12.

When deciding the maximum fixing distances for conduit saddles, reference should be made to

a)

BS 7671

b)

On-site guide

c)

Guidance notes 3

d)

The Electricity at Work Regulations.

13.

Specialist cables and installation techniques will be required for:

a)

power supplies to motors

b)

closed circuit TV and data transmission

c)

ring final circuits and domestic lighting

d)

block storage heating.

14.

Copper cored data communication cables are made up of pairs of conductors twisted along their length in order to:

a)

reduce electrical interference

b)

add strength to the cable

c)

reduce overall cable size

d)

increase the cable current rating.

15.

A component designed to disconnect a supply under full load conditions is:

a)

a fuse

b)

an isolator

c)

a detector

d)

a switch.

16.

In situations where there is a risk of an explosion due to the presence of fumes and gases electrical switches and control equipment must be:

a)

remotely controlled

b)

mounted in flameproof enclosures

c)

placed outside the danger zone

d)

connected to a low voltage supply.

17.

The type of earthing arrangement which generally uses the supply cable metal sheath or armouring as the earth return path is known as:

a)

TT

b)

TN-C

c)

TN-C-S

d)

TN-S.

18.

The TT system of earthing is usually used in:

a)

rural areas

b)

urban areas

c)

domestic installations

d)

industrial installations.

19.

An earthing system that can only be used in special circumstances and uses a combined neutral and earth conductor in the supply and the installation is the:

a)

T T system

b)

T N-S system

c)

T N-C-S system

d)

T N-C system.

20.

An isolator used to provide isolation of electrical supplies is designed to operate under:

a)

full load conditions

b)

no-load conditions

c)

overload conditions

d)

short circuit conditions.

21.

Before commencing work on a construction site, a contracting electrician must identify:

a)

hazards and personal protective equipment required

b)

the location of the canteen and dining facilities

c)

the site manager’s office

d)

the name and telephone number of the client.

22.

When working on electrical circuits, the supply should be:

a)

switched off using stop buttons

b)

short circuited to ensure it is not live

c)

isolated and locked in the off position

d)

left connected and treated with care.

23.

Inspection bends, elbows and conduit boxes should be used on long conduit runs to provide a means of:

a)

testing cables after completing the installation

b)

reducing vibration in the conduit

c)

improving the appearance of the installation

d)

reducing stress on cables when drawing them in.

24.

When using metal trunking, continuity is maintained at all joints by:

a)

fitting copper continuity straps

b)

brazing the joints

c)

removing the paint from the trunking

d)

drilling and fitting extra fixing screws.

25.

Spring toggles and screws are used when fixing electrical equipment to:

a)

hollow walls

b)

brick walls

c)

concrete ceilings

d)

wooden floors.

26.

Steel-wired armoured cables must be supported at regular intervals as specified in BS 7671 in order to:

a)

reduce vibration in cables

b)

reduce stress on cables

c)

increase air circulation round cables

d)

improve the appearance of installations.

27.

After cutting and threading conduit, burrs should be removed using a:

a)

reamer

b)

pair of pliers

c)

knife

d)

spanner.

28.

Portable power tools should be inspected:

a)

every three months

b)

after being repaired

c)

before and after use

d)

when being serviced.

29.

Holes in floors and ceilings should be restored on completion of an installation, with suitable materials and to the original thickness, in order to:

a)

prevent the loss of heat

b)

restore the strength of the building

c)

secure cables and conduits installed

d)

prevent the spread of fire.

30.

Three factors which would affect the choice of wiring system would include:

a)

ambient temperature, aesthetics and presence of livestock

b)

the ability of the installer, regulatory requirements and erosion

c)

corrosion, erosion and the current seasonal condition

d)

personal stress, strain and regulatory requirements.

31.

When calculations show that the voltage drop between the supply terminals and a lighting load will exceed 3% of the supply voltage, the action to be taken is:

a)

limit the time the load is connected

b)

increase the supply voltage using a transformer

c)

increase the size of the cable supplying the load

d)

connect the load at off peak times only.

32.

To comply with IEE Wiring Regulations the voltage drop on a three phase 400V power circuit should not exceed:

a)

4V

b)

8V

c)

20V

d)

32V

33.

Dangerous waste materials produced when terminating optical cables should be:

a)

taken off site and placed in suitable containers

b)

left on site with instructions for disposal

c)

thrown outside buildings

d)

ignored and left in situ.