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WorksheetsElectrics for plumbers
Total questions: 10
Worksheet time: 5mins
What size cable is used to wire an immersion heater to a switched fuse spur
2.5mm twin and earth
1.5mm butyl heat resistant flex
1.5mm flex
1.0mm butyl heat resistant flex
What is a legal required device to have on an Immersion heater
It is a legal requirement to have automatic thermostat on the immersion
It is a legal requirement to have a cold trip out device on the immersion heater
It is not a legal requirement to have a thermal cut-out device on the immersion
It is a legal requirement to have a thermal cut-out (reset) device on the immersion
Voltage = V this is:
The unit for electromotive force (emf): the higher the voltage the greater the force is, to cause electrons to flow along the conductor
It is the unit of current, and can be defined as the unit of quantity or volume passing down a conductor
It is the unit of resistance, which opposes the flow of current.
It is the unit of power for an appliance. Power is used in making an appliance work. As some power is absorbed, an appliance is never 100% efficient
What colour is the live cable that connects to the plug fuse
Blue
Black
Brown
Green/yellow
What is OHM's law
A law relating the voltage difference between two points, the electric current flowing between them, and the resistance of the path of the current.
The law that says you are only allowed to work on electrical supplies if you are a qualified electrician
A law relating the voltage difference between electrics when the current is on and then off .
Part P of the building regulations that permits electrical work in a danger zone like a bathroom, kitchen, cloakroom or out house
What is this electrical item and its use
A switched fused spur used to isolate both the live and neutral when turned off - used to connect shower pumps and immersion heaters to an electrical supply under 13 amps
A light switch used to isolate the live and neutral when turned off - used to connect shower pumps and immersion heaters to an electrical supply
A switched fused spur used to isolate the neutral wire when turned off - used to connect shower pumps and immersion heaters to an electrical supply
A switched fused spur used to isolate both the live and neutral when turned off - used to connect electric showers and cookers over 16 amps
Which of these are all common electrical faults
•Electrocution,•Electric shock
•Fire,•Component failure
•Reduced life of component
•Electrocution,•Electric shock
•Cheaper electricity ,•Reduced life of component
•Electrocution,•Electric shock
•Fire, •Component failure
•increased life of component
•Electrocution, •Electric shock
•Water damage , •Component failure
•Reduced life of component
What can cause electrical faults
Incorrect fuse size
Incorrect flex size
All the answers
Bad installation
Damaged cables
Where would you use this type of switch
Immersion heater
Electric instantaneous shower
Shower pump
Boiler control
What is the name for this switch
Double pole pull switch
Single pole pull switch
Triple Pole pull switch
Switched fused spur
