NEW
Font size
WorksheetsElectrical Diagrams 1
Total questions: 25
Worksheet time: 13mins
Which of the following electrical symbols represents a batten holder
Which of the following electrical symbols represents a single 2 way switch
Which of the following electrical symbols represents a recoding type meter
Which of the following electrical symbols represents a changeover contact on a electrical circuit diagram
Which of the following electrical symbols represents a permanent connection unit
Which of the following electrical symbols represents a time delay make contact on a circuit diagram
Which of the following electrical symbols represents a temperature operated switch on a circuit diagram
Which of the following electrical symbols represents a distribution board on a location drawing
Which of the following electrical symbols represents a RCD on a electrical sngle line drawing
Which of the following electrical symbols represents a smoke detector on a location drawing
On a three heat switch circuit how are the elements connected when switched to the LOW heat setting?
2 elements connected in parallel
1 element connected in series
1 element connected in parallel
2 elements connected in series
With reference to a circuit diagram: In a parallel circuit more important components are placed in line with the conductor and less important are drawn offset to the conductor
True
False
A block diagram is used to show component details and does not show the sequence of events or processes
True
False
A schematic diagram shows the order that the individual electrical components are arranged.
True
False
On a three heat switch circuit how are the elements connected when switched to the HIGH heat setting?
2 elements connected in parallal
1 element connected in series
2 elements connected in series
1 element connected in parallel
A wiring diagram is used to show the physical connections to components in a circuit. It shows where to put the wires.
True
False
What type of device is used to change the time, current is supplied to a element on a cooktop
Thermostat
Time clock
Simmerstat
Reed switch
What type of device is operated by temperature and needs some form of temperature reading system
Simmerstat
3 heat switch
Regulator
Thermostat
Holding contacts are "normally closed contacts" that are wired to hold a control circuit energised.
True
False
Controls that are initially set or activated and then continue on their own are described as being ___________ controls
Semi-automatic
Manual
Automatic
Independant
When selecting control devices for a circuit what is NOT a factor that needs to be taken into consideration
The numbering of the device input and output contacts
The power the device is expected to handle
The type and amount of current flowing in the device and for how long
The type and and amount of voltage seen across the device
On a star delta starter the starting voltage is reduced to __% of that obtained with a direct on line starter.
90
66
58
33
On a star delta starter the starting torque of the motor is reduced to __% of that obtained by a direct on line starter
81
58
40
33
On a reversing set of control contactors the contactors must be either mechanically or electrically interlocked.
True
False
On a domestic installation how many 10A double power points are permitted on a circuit protected by a 20 amp MCB
5
10
15
20
