WorksheetsElectrical Principles 6035-02 | Part 6
Total questions: 31
Worksheet time: 18mins
The British Standard that covers electrical work is:
BS EN 806
BS 6700
BS 7671
BS 1212
Mains electricity is 230 V?
AC
DC
2CV
PCB
The wiring to all the lighting in a domestic house is know as?
Socket ring
The ring main
Spur outlet
Radial circuit
What size MCB protects the immersion heater?
6 amp
16 amp
32 amp
13 amp
This picture shows:
RCBO
RCD
MCB
Fuse
This picture shows a?
Fuse
MCB
RCBO
RCD
What type of flex should be fitted to an immersion heater?
20 amp flex
13 amp heat resistant flex
20 amp heat resistant flex
13 amp flex
What unit is used to measure current?
Ohms
Amps
Omega
Volts
What is the voltage of a circuit with 4 ohms of resistance and 3 amps of current? (a)
12 V
21 V
1.5 V
0.7 V
What is the resistance of a lightbulb that experiences 9 Volts and 3 amps of current?
9 ohms
0.3 ohms
27 ohms
3 ohms
If a circuit had 4 D-Cell batteries (each 1.5 V) and a lightbulb with resistance of 2 ohms, what is the current that flows through the circuit? (a)
2 A
3 A
6 A
8 A
What is resistance?
the amount of push the electrical source supplies to the circuit
how much a given device resists the flow of electric current
flow of electric charge
none of the above
What is the second step to safe isolation?
Start work
Lock off
Lock of with key in pocket
Identify the circuit
a buildup of electric charges on an object
static electricity
electric force
electrical circuit
electric discharge
What is the maximum percentage of trunking that can be filled with cable
35%
55%
65%
45%
An example of an exposed conductive part would be
A radiator in a bathroom
Kitchen sink
A gas service pipe
The casing of a metal distribution board
A test of continuity at each socket-outlet or a ring final circuit is carried out to ensure that
The polarity of sockets is correct
All cables are of the same construction
The ring has not been interconnected
All cables are of the same size
Why are these bird safe?
They are only touching one wire, so the current has nowhere to go
They are touching two different wires, so the current cannot flow to the ground
They are touching a wire and a pole connected to the ground, so the current can only flow to the ground
The device shown is a
RCD
Transformer
Proving Unit
Storage Battery
A visual inspection should be carried out on electrical tools
at least once every week
at least once every month
at least once every 3 months
every time before it is used
The symbol shown means that the appliance
needs an earth connection
does not need an earth connection
is safe to use
operates at 110 Volts
the correct colour coding for the wiring of a plug would be
earth green and yellow / blue line / brown neutral
earth green and yellow / blue neutral / brown line
earth blue / neutral green and yellow / brown line
earth brown / neutral blue / line green and yellow
The equipment shown is a
temporary continuity bond
earth bond
electrical jump leads
continuity tester
the correct fire extinguisher for an electrical fire would be
Water
Foam
CO2
Dry Powder
A safety sign that warns you of an electrical hazard would be coloured
white with red border
yellow with black border
blue and white
green and white
Before fitting this component what needs to happen to the pipe
Test the voltage drop
Do an earth ground test
Turn off the water supply
Any paint needs to be removed
What size earth cable is required for supplementary earth bonding
10mm
6mm
16mm
2.5mm
