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WorksheetsCity & Guilds 8202-20 Mock 001
Total questions: 30
Worksheet time: 15mins
Three resistors of 17 Ω, 44 Ω and 66 Ω are connected in parallel. What is the total circuit resistance?
0.09 Ω
10.34 Ω
42.33 Ω
127.0 Ω
An ammeter is to be installed in the circuit shown in Figure 1. At which point in the circuit must this be installed in order to measure the total load current?
1
2
3
4
What is the total current in the circuit in Figure 2 if the ammeter reads 8 Amps?
6.6 A
10.2 A
37.3 A
45.3 A
What is the SI unit of measurement for capacitance?
Ampere
Farad
Henry
Webber
What is the unit of magnetic flux?
Watt
Tesla
Weber
Coulomb
Which electrical item would most commonly contain a permanent magnet?
Float switch in a water tank
Dimmer switch on a lighting circuit
Shower isolator in a bathroom
Security contact on a door
What does the thumb in Fleming's Right Hand Rule represent the direction of?
Field
Motion
Current
Resistance
What force would be created by a current of 9.15 A flowing through 1800 mm of conductor with a flux density of 0.35 T?
1.78 N
5.76 N
47.0 N
5764.5 N
What is the formula used to calculate the RMS voltage on a 50 Hz sine wave?
V = Peak/2
V = Peak/√2
V = 1/2 × Peak
V = 1/√2 × Peak
Which cable insulation material must not be used in direct contact with expanded polystyrene?
PVC
XLPE
Glass
Rubber
Which type of circuit would be most likely to contain an intermediate switch?
Shower
Lighting
Cooker
Alarm
What is the maximum number of 4 mm² single-core conductors that can be installed in one straight 3 m length of 20 mm galvanised conduit?
6
7
8
9
Which of the following would be the best PVC conduit temperature to assist the process of making a 90° bend?
0 °C
10 °C
60 °C
200 °C
What type of fixing is shown in Figure 5?
Anchor bolt
Channel nut
Masonry bolt
Spring toggle
What is the purpose of a catenary wire?
Drawing in cables into conduit
Providing an earth connection
Supporting overhead conductors
Connecting a computer system
Which type of cable would commonly use the type of connector shown in Figure 6?
CAT 5
Coaxial
Single-core
Twin and cpc
What is the maximum transmission voltage used on the UK super-grid?
132 000 V
275 000 V
400 000 V
660 000 V
Who is responsible for the meter tails prior to the electricity meter?
Local authority
Installation owner
Licencing authority
Network operator
What must as a minimum be provided at the origin of all single-phase installations?
Single-pole main switch
Double-pole main switch
Triple-pole main switch
Quadruple-pole main switch
What must be provided adjacent to a lathe in a machining workshop?
30 mA RCD.
Main switch.
Circuit breaker.
Emergency switch.
Which would be the most appropriate rating for a circuit breaker protecting a lighting circuit in a three-bedroom dwelling?
1 A
6 A
20 A
32 A
A 4 mm² 70°C thermoplastic insulated and sheathed flat cable with protective conductor is to be installed Reference Method C. What would be the maximum rating of a BS 3036 fuse providing overload protection for this cable?
5 A
15 A
20 A
30 A
What must be supplied to the client following the installation of a new circuit and an electric shower?
Electrical Installation Certificate.
Minor Works Certificate.
Electrical Installation Condition Report.
Periodic Inspection Report.
What would be the voltage drop for a 28 m 1.5 mm² single-phase circuit supplying a load of 13 A using 70°C thermoplastic insulated and sheathed flat cable with protective conductor?
16.0 V
11.5 V
10.6 V
6.9 V
What is the maximum current that a 2.5 mm² single-core cable can carry when installed in a conduit on a wall?
15 A
20 A
25 A
30 A
What is the purpose of a residual current device (RCD) in an electrical installation?
To measure current flow
To prevent electric shock
To increase current flow
To decrease resistance
What is the total resistance of a circuit that has four resistors of 4 Ω each connected in series?
1 Ω
4 Ω
16 Ω
64 Ω
What is the purpose of a fuse in an electrical circuit?
To increase the current flow
To decrease the resistance
To protect the circuit from overcurrent
To measure the current flow
What is the unit of electrical power?
Ohm
Watt
Ampere
Volt
What is the total resistance of a circuit that has three resistors of 3 Ω each connected in parallel?
1 Ω
3 Ω
9 Ω
27 Ω
