Worksheets2365 - 203 Electrical Technology - Mock Exam
Total questions: 40
Worksheet time: 30mins
A Scale drawing of a room is drawn 100mm x 150mm. The actual size of the room is 5m x 7.5m. Which of these ratios represents the scale used?
1:100
0.180555556
1:50
50:01
If an inspector from the HSE determines that there is a risk of personal injury, they will issue:
a summons
a prohibition notice
a written warning
an improvement notice
On a scaled drawing 10mm represents 1m when scaling up for the site values must be taken from the drawing and multiplied by?
10000
1000
10
100
If a ring main circuit has a 32 A fuse 230 V supply the maximum power available at any one time is
73.36W
736W
7360W
73600W
The purpose of a protective device in a circuit is to
avoid mechanical damage
allow work to be done on a live circuit
show when there is an open circuit
disconnect a circuit when a fault occurs
A location drawing is scaled at 1:50. The route length of a cable run on the drawing is 85mm the length of the cable will be?
4.25m
17m
42.5m
58.9m
What should be written on the label attached to an earth clamp?
safety connection don't remove
electrical connection
safety electrical connection do not remove
warning high voltage
What is represented by Zs in the following formula: Zs = Ze+(R1+R2)?
Total earth fault loop impedance
External earth fault loop impedance
Final circuit earth fault loop impedance
Combined resistance of the earth path
When cabling is routed through insulation the rated:
Current will be decreased
Current will be increased
Current will stay exactly the same
Current will be doubled every metre
Which one of the following is the correct drawing scale where a wall, 4m in length measures 8cm on a drawing?
1:50
1:200
1:100
1:500
Which one of the following is an extraneous conductive part?
Metallic gas service pipe
Metal-clad twin socket outlet
Heavy duty steel conduit
PVC mini-trunking
Which one of the following uses sunlight to generate electricity?
Photo-voltaic
Biomass
Wind
Air source heat pump
If class II and class I cabling is in the same cable space how should it be placed:
In the same space as long as currents are not higher than 10Amps
At 90° to each other
Separated by metal divisions
Wrapped around each other
Which one of the following describes the process of a solar photo voltaic system?
Solar power is used to ignite a biomass which heats up water
Solar power is collected by a solar panel which provides electricity
Solar power is collected by a solar panel which provides hot water
Solar power causes hot air to rise rotating a generator that produces electricity
What does the picture represent?
Power Station
Pylon
Sub-station
110v transformer
The final conductor by which the connection to the earth electrode or other means of earthing is made is called the?
circuit protective conductor
earthing conductor
earthing strap
earthing bond
If a 1:20 scale drawing of a room measures 220mm X 100mm, what is its actual size?
11m x 5m
2.22m x 1m
220mm x 100mm
4.4m x 2m
Under the EAWR 1989, before work may commence, it must be shown that a person is what?
Confident
Competent
Compliant
Competitive
When marking out trunking for cutting, an electrician would use:
Pencil tape and spirit level
Steel rule square and scriber
Hacksaw file and centre punch
Rule of thumb square and spirit level
Where vertical trunking passes through floors internal fire resistant barriers must be
at maximum intervals of 3 m
only at the top of the trunking
at each floor level
mid-way between each floor
The two key pieces of information required when completing a day work sheet are?
The name of the authorising person and their signature
The name and employee number of the electrician
The amount of extra time and materials that have been used
Any special conditions and work carried out
Band I and Band II circuits can be enclosed in the same enclosure provided that:
the current rating of all circuits does not exceed 10A
they are twisted around each other along the trunking length
every cable or conductor is insulated for the highest voltage present
there are the same number of Band I and Band II circuits
If the earth resistance value of the whole system is greater than 10? how should a permanent reduction be achieved?
Add more earth electrodes
Use smaller cable
Use fewer earth electrodes
Urinate on the ground around the electrode
An immersion type water heater is to be installed. If the water heater is rated at 3 kW 230 V it should be installed as a
dedicated 10 A radial circuit
dedicated 16 A radial circuit
spur from a 32 A appliance ring
spur from a 32 A ring final circuit
Which one of the following earthing arrangements is shown in the diagram?
TT
TN-S
TN-C-S
TN-C
What max. spacing should clips for 2.5mm TC+E when ran horizontally be:
0.2m
0.25m
0.3m
0.35m
The image represents which type of earthing system?
TT
TN-C-S
TN-S
IT
What is the purpose of the National Grid?
Transmission of electricity from power stations to industrial locations
Transmission of electricity from power stations to substations
Transmission of electricity from sub stations to domestic premises
Transmission of electricity from power stations to factories
The earthed neutral of the authorities supply must be fitted at the intake position with a?
Fuse
Solid Link
Single-pole switch
Circuit breaker.
The typical cabling for use in electrical installations in domestic premises would be
SWA
PVC/PVC
MICC
PVC Single
What does the letters COSHH stand for?
Care Of Substances Hazardous to Health
Control of Substances Hazardous to Health
Control of Some Harmful Hazards
Care of Safety Health Hazards
The preferred method of instructing the client in the correct use and maintenance of electrical equipment used within an installation would be to?
provide them with an operations and maintenance manual
provide them with a guided tour and verbal instructions during the handover period
provide them with the manufacturers catalogue
leave relevant manufacturers literature adjacent to equipment
Which of the following is NOT a statutory document?
IEE Wiring Regulation BS 7671
Electricity Safety Quality and Continuity Regulations
Health and Safety at Work Act
Electricity at Work Regulations
Which of these systems has the neutral and earth in one conductor?
TT
IT
TNS
TN-C-S
Which one of the following defines the term main protective bonding conductor?
The conductor which links the MET to an earth electrode
The conductor which links the MET to extraneous conductive part
The conductor which links the MET to exposed conductive parts
The conductor which links the MET to the means of earthing
230V is represented by which of the following colour outlets
Blue
Black
Yellow
Red
Which one of the following symbols represents the rating factor for grouping?
Ci
Ca
Cf
Cg
The main purpose of equipotential bonding is to?
maintain adjacent metalwork at the same electrical potential
improve the earth loop impedance
increase the impedance of the earth return
prevent earth faults
Which one of the following is the minimum conduit size suitable for a short straight run containing the following stranded cables: 8 x 1.5mm2; , 2 x 2.5mm2; , 2 x 4.0mm2?
16mm
20mm
25mm
32mm
What does the picture represent?
Power station
Pylon
Sub-station
110v transformer
