Worksheets2365 Unit 203 Revision 1
Total questions: 40
Worksheet time: 31mins
Which one of the following earthing arrangements is shown in the diagram.
TNCS
TT
TNC
TNS
Which item of information is NOT illustrated on a bar chart work schedule?
Start and finish dates
hours worked per day
plant/equipment delivery dates
labour requirement at contract stage
The insulation material in mineral insulated cable is
manganese oxide
magnesium dioxide
manganese dioxide
magnesium oxide
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 next to the equipment
The typical cabling for use in electrical installations in domestic premises would be
SWA
PVC/PVC
MICC
PVC Single
Which one of the following is a transmission voltage?
400 KV
33 KV
11 KV
400 V
What do the letters T, N, C and S stand for with regard to earthing systems?
Totally Necessary Combination and Safe
Terra Neutral Combination and Separate
Totally Neutral Combined and Separate
Terra Neutral Combined and Separate
What is the current carrying capacity (It) of a 1 mm^2 single core thermoplastic PVC non armoured cable, that is installed in conduit?
11 A
44 A
13 A
6 A
The Health and Safety at Work Act?
Is for the guidance of employers
Is for the guidance of employees
Explains the duties of employers
Explains the duties of employers and employees
The disconnection time for ring or radial socket outlet circuits is
4 seconds
5 seconds
0.4 seconds
0.5 seconds
Under the EAWR 1989, before work may commence, it must be shown that a person is what?
Confident
Competent
Compliant
Competitive
The minimum bending radii of Mineral insulated (MICC) cable is how many times the cable diameter for: rework and (non rework)
4 (1)
5 (2)
6 (3)
7 (4)
When electrical energy is transmitted a t 400 KV, it is known as?
The super grid
The local grid
Medium voltage transmission
Local distribution
A scale drawing of a building is drawn 500 mm x 300 mm. The actual size of the building is 25 m x 15 m. What scale is used?
0.11111
1 : 50
50 : 01
100 : 1
Which one of the following uses sunlight to generate electricity?
photo-voltaic
Biomass
Wind
Air source heat pump
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
Cables in wooden joists must beat at least what distance from the top or bottom:
30 mm
45 mm
50 mm
65 mm
Which one of the following earthing arrangements is shown in the diagram?
TNCS
TT
TNC
TNS
The sequence of control for a large installation can be MOST simply shown by?
Wiring diagram
Layout diagram
Circuit diagram
Block diagram
What cable is used to connect lots of computers in a LAN that is suitable for high rates of data transmission:
Mineral insulated
Thermosetting insulated
Fibre Optic
Armoured cable
Which oe of the following is the minimum conduit size suitable for a short straight run containing the following stranded cables: 8 x 1.5 mm2; 2 x 2.5 mm2; 2 x 4 mm2
15 mm
20 mm
25 mm
32 mm
In which of the following parts of the electrical distribution network would a step-down transformer be located?
Power Station
Pylon
Local distribution sub station
Inverter
Which of these systems has the neutral and earth in one conductor?
TT
IT
TNS
TNCS
Underground distribution systems within an industrial estate will most likely use?
MICC
XLPE SWA
FP 200 Gold
Busbar Trunking
When installing equipment, a contracting electrician must be able to ?
Design the installation
Interpret drawings and diagrams
Prepare working drawings
Prepare site specifications
What do the letters CDM stand for?
Control of Demolition and Management Regulations
Control of Dangerous Materials Regulation
Construction (Demolition Management) Regulations
Construction (Design and Management) Regulations
Which one of the following is the maximum current carrying capacity for a single core; 6 mm2, 70 degrees celsius, thermoplastic insulated, non armoured cable, enclosed in conduit on a wall installed for a single phase circuit?
31 A
32 A
36 A
41 A
Which one of the following is an exposed conductive part?
Metal-clad switch
Structural steelwork
Air-conditioning ducting
Metallic oil service pipe
From which regulation does this definition come from and refer to ;
'all equipment which is intended to be worn, or held, to protect against risk to health and safety'?
PUWER
HASAWA 1974
PPE at work regulations 1992
EAWR
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
25 mm flat twin with cpc cable would normally be used for a?
32 A domestic ring main
1.5 A lighting circuit
17 kW cooker supply
6 kW shower unit circuit
So that all contractors can understand the content of site and other drawings, they are provided with, it is necessary to?
Produce drawings using recognised standards
Explain verbally the content of drawings
Produce large scale drawings
Prepare detailed additional information
In a wet room, where is a bath located?
Zone 0
Zone 1
Zone 2
Zone 3
The main purpose of as fitted drawings is to form part of the?
tender documents
network diagrams
work study schedules
records of work
Area Distribution Boards in large factories and commercial premises should normally be positioned
close together
in inaccessible positions
near to the load centres
near to the supply intake
If a ring main circuit has a 32 A fuse 230 V supply, the maximum power available at any one time is
73.36 W
736 W
7360 W
73600 W
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
What is the Ze for a TNCS system?
0.8 ohm
0.35 ohm
20 ohm
1.75 ohm
One of the main aims of the health and Safety at Work Act 1974 is to secure the health, safety and welfare of people where?
at home and public places
at home
at work
at home and work everywhere
Which one of the following describes Fault Protection?
Preventing contact with parts which are intended to be live
Limiting the risk of electric shock by live parts under fault conditions
Removing the risk of electric shock through separation of circuits
Preventing exposed parts from becoming live under fault conditions
