1 The statutory regulations that set standards which will reduce the risk of electric shock, burns and fire due to the use of electrical systems are
a The Electricity at Work Regulations
b The IEE Wiring Regulations
c The Personal Protective Equipment Regulations
d The health and Safety at Work Act
2 Specific guidance is given to the selection of cable sizes, isolation and switching, and inspection and testing for electrical installations in
a The Health and Safety at Work Act
b The Electricity at Work Regulations
c The Electricity Supply Regulations
d The IEE 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 BSEN numbers on electrical equipment signifies compliance with
a International standards
b European standards
c English standards
d Insulation standards
5 Exploded views in manufactures manuals are generally used to show
a complex components with many parts
b large machine parts
c wiring diagrams of machines
d machines having few parts
6 An electrical contractor drawing up 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
7 A drawing measuring 2m x 1m representing a site measuring 2km x 1km will be drawn to a scale of
a 1:500
b 1:1000
c 1000:1
d 500:1
8 To check the ongoing progress of a contract, the contracts manager would use
a work sheets and time sheets
b operation and data sheets
c delivery records and reports
d operation sheets and memorandum
9 Circuits used to measure and contraol temperature, air flow, and humidity in a building are called
a emergency management circuits
b environmental control circuits
c power control circuits
security control circuits
10 A wiring system allowing easy replacement and addition of cables as
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 armoured cable
d cable tray
12 When calculations show that the voltage drop between the supply terminals and a load will exceed 4% of the supply voltage the action to be taken is to
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
13 To comply with IEE Wiring Regulations the voltage drop on a three phase 400v circuit should not exceed
a 4v
b 8v
c 16v
d 32v
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 increases 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 Supplementary equipotential bonding is required in all
a outbuildings
b low voltage installations
c bathrooms
d dinning rooms
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 installation is the
a TT system
b TN-S system
c TN-C-S system
d TN-C system
20 Isolators used to isolate electrical equipment are 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 site a contracting electrician should identify
a hazards and personal protective equipment required
b the location ot the canteen and dinning facilities
c the site managers office
d the name and telephone number of the client
22 When working on electrical equipment the supply should be
a switched off using buttons
b short circuited to ensure it is not live
c isolated and locked off in the off position
d left connected and treated with care
23 Inspection bends, elbows and sleeves should be used on long conduit runs to provide a means of
a inspecting 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 as a circuit protective conductor, 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 fitting 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 Armoured cables must be supported at regular intervals as specified in BS7671 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 3 months
b after being repaired
c before and after use
d when being serviced
29 Holes in floors and ceilings should be restored with suitable materials and to the original thickness at the completion of an installation 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 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
answers
1a 2d 3c 4b 5a 6b 7b 8a 9b 10d 11b 12c 13c 14a 15d 16b 17c 18a 19d 20b 21a 22c 23d 24a 25a 26b 27a 28c 29d 30a
