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WorksheetsGMJ 6035 electrical quiz NEW
Total questions: 52
Worksheet time: 26mins
Which of the following documents should be referred to for specific wiring details of domestic heating controls?
Manufactures Instructions
Building Regulations
Wiring Regulations
User Instructions
Which one of the following is the most likely supply voltage type and rating used for central heating circulating pump?
220 V a.c.
110 V d.c.
230 V a.c.
230 V d.c.
Which one of the following voltages would be found on a low voltage central heating wiring system?
24 V a.c.
24 V d.c.
12 V d.c.
110 V a.c.
What type of domestic electrical circuit is shown in the following diagram?
Spur Circuit
Lighting Circuit
Radial Circuit
Ring Main Circuit
Which one of the following earthing arrangements uses and installation earth electrode as part of the fault path?
TN-C
TN-C-S
TT
TN-S
Which one of the following conductors connects an installation's Main Earthing Terminal to the incoming metallic Water Supply Service Pipe?
Circuit Protective Conductor
High Integrity Protective Conductor
Main Protective Bonding Conductor
Supplementary Bonding Conductor
Which one of the following conductors would normally connect two water pipes together within a bathroom location?
Circuit Protective Conductor
High Integrity Protective Conductor
Main Protective Bonding Conductor
Supplementary Bonding Conductor
Which one of the following protective devices operates under earth fault conditions only?
RCD
RCBO
Circuit breaker
HBC Fuse
Identify the protective device in the image which operates when the system is overloaded?
RCD
RCBO
Circuit breaker
HBC Fuse
Refer to the following list of cartridge fuses. Which one would be selected to provide overcurrent to the fused connection unit to a 230v domestic heating central heating control system with a total load of 600 Watts?
3 A
13 A
16 A
30 A
Identify Component C in the image shown. This component would be used to distribute a single energy source to multiple final circuits within a domestic electrical installation?
Customers consumer unit
Suppliers energy meter
Suppliers cut-out
Consumers main earth terminal
What type of electrical cable is shown in the image?
Heat resisting PVC insulated sheathed 3 core flexible cable
PVC insulated and sheathed this and earth flat wiring cable
PVC insulated and sheathed 3 core and earth flat wiring cable
Armoured SWA type 3 core cable
Which one of the following protection methods applies when installing circuits using single-core cable?
The cable must be directly buried in the wall
The cables must be clipped to the surface
The cables must be enclosed in conduit
The cables must be protected by an RCD
Which one of the following would most likely be the first to be damaged if the current in a cable exceeds its current carrying capacity?
Cable core
Cable Insulation
Cable sheathing
Cable Containment
Which one of the following names the component shown in the image?
Terminal Strip
Temporary continuity bond
Earth bonding clamp
Pillar terminal fixing
Which one of the following is shown in the image?
PVC insulated multi core flexible cable
PVC insulated and sheathed twin and earth cable
PVC insulated and sheathed 3 core and earth cable
Heat resisting PVC insulated 3 core flexible cable
Which one of the following states the recommended method used to secure a circuit breaker in the off position?
Electrician working warning notice
Locking device with unique key
Removal of the circuit breaker
Electrical insulation tape
Which one of the following is shown in the image?
Earthing bonding clamp
PVC Insulated earth cable
Voltage indicator
Magnetic field indicator
A circuit breaker located within a consumer control unit controlling a shower circuit requires replacement. Which one of the following states the correct part of the installation for the carrying out of safe isolation?
The consumer unit main switch
The circuit breaker being replaced
At the local shower isolator switch
At the suppliers main cut-out fuse
A ring final circuit requires the addition of a fused connection unit for a boiler. Which of the following is the most suitable location to carry out safe isolation in order to carry out this work?
The consumer unit main switch
The circuit breaker for the circuit
At the boiler time-clock/controller
At the suppliers main cut-out fuse
Which one of the following is the correct method of ensuring safety following safe isolation and locking off the circuit?
Give a copy of the key to the client
Keep the key beside the CCU
Retain the unique key with you
Keep the key in the lock
Which one of the following is the correct order for the procedure?
1, 3, 5, 2, 4, 1
1, 5, 1, 4, 2, 3
1, 4, 5, 2, 1, 3
1, 2, 3, 4, 1, 5
Which one of the following faults is most likely to cause electrocution?
Short circuit
Overload
Loose connection
Earth faults
Which one of the following is the most likely fault if an appliance works intermittently?
Loss of protective bonding
Appliance fuse size over rated
Loose connection in appliance plug
Damaged insulation within the flexible cable
Which one of the following would most likely cause an RCD to trip when an electric shower is switched on using local functional switch?
A short circuit between live conductors in the shower final circuit
A short circuit within the safety device included in the shower final circuit
A fault between live conductors within the shower unit
A fault between live and earth within the shower unit
When wiring up a plug top, the connections should be made in a way to ensure that the cable is pulled with sufficient force to remove it from the plug?
The earth connection would be the last to broken/earth
The live connection would be the last to be broken/live
The neutral connection would be the last to be broken/neutral
All connections should break together/all together
An intermittent fault exists in a hot water immersion heater. It appears that the cable has become brittle and the circuit keeps shorting out. What is the most likely cause of the fault?
A non-heat resistant flex being used
The wrong sized fuse installed
The flex has incorrectly sized conductors
the flex connections are loose
Which one of the following is the most likely cause of brown discolouring around the front of the socket-outlet?
Loose line connection within the plug of an appliance regularly used at socket
Loose connection of the circuit neutral at the main neutral bar within the CCU
Loose CPC within the plug of an appliance regularly used at the socket
Loose CPC connection at the back of the socket-outlet which has discoloured
Fault diagnosis reveals a serious fault in a domestic installation which could result in serious electric shock if not rectified. Which one of the following persons should be informed immediately in this situation?
The health and safety executive
The local building control Authority
The owner/occupier of the property
The institute of engineering technology
Fault diagnosis is being undertaken in a building during non-working hours (when the building is unoccupied). A serious and life-threatening fault is discovered to the wiring of a circuit and rectification of the fault will require major works. Which one of the following actions would be the most appropriate in this situation?
The circuit should remain un-touched until a suitable meeting with the client is arranged
The circuit should be securely isolated until the client can be informed of the risk
The circuit should be stripped out until an agreement to rewire it is made
The section of the building concerned should be cordoned-off and notices posted
Which one of the following is the most likely consequence if a loose neutral connection within a lighting circuit is not rectified?
Increased energy bills
Fire
Electric shock
Burns
The item of equipment shown in the diagram is most likely to be used?
As a quick method of connecting a live cable to an appliance if it is working following repair work
For temporarily bridging the supply prior to the consumer unit and appliance where the MCB has tripped
For connecting between the live and neutral on the ring main when carrying out a circuit polarity test
As temporary earth continuity bonding whilst removing a section of metal pipe work
Which one of the following is the reason for applying temporary continuity bonds to pipe work?
They are applied after cutting a section of plastic pipe to minimise the risk of electric shock should the pipe be carrying a residual fault current
They are applied before cutting a section of plastic pipe to minimise the risk of electric shock should the pipe be carrying a residual fault current
They are applied after cutting a section of metallic pipe to minimise the risk of electric shock should the pipe be carrying a residual fault current
They are applied before cutting a section of metallic pipe to minimise the risk of electric shock should the pipe be carrying a residual fault current
Which one of the following tools would be used to cut a copper conductor within a flexible cable to the correct length?
Hacksaw
Jigsaw
Side cutters
Craft knife
Which one of the following types of connection is a commonly used within a joint box used in domestic wiring systems?
Screw
Compression
Crimp
Clamp
Which one of the following tests would use a test voltage of 500 V d.c.?
Continuity of protective conductors
Continuity of ring final circuits
Insulation resistance
Polarity
Which of the following devices is used to measure electrical current?
An Ammeter
An insulation resistance tester
A digital manometer
An approved voltage indicating device
What is resistance measured in?
Watts
Volts
Amps
Ohms
Which type of electrical test is carried out to confirm that line and neutral conductors are connected correctly and not crossed?
Polarity test
RCD test
Insulation resistance test
Earth continuity test
Which one of the following colours connectors should be connected to the line terminal of a three-pin plug?
Red
Blue
Brown
Black
When carrying out insulation resistance testing on a 230 V circuit the minimum acceptable value according to B” 7671 is
0.5 Ω
1.0 Ω
0.5 MΩ
1.0 MΩ
When conducting a continuity test to ensure a radial circuit is earthed, the highest value of resistance would be measured at the
Consumer unit
Midpoint of the circuit
Furthest point on the circuit
Incoming water service pipe
Which of the following is a reason for carrying out a polarity test? To ensure
Conductors are correctly connected
That no earth faults are present
That no short circuits are present
That the circuit is earthed
What does R1 + R2 represents when measuring continuity
The resistance of the line and neutral conductors
The resistance of the circuit protective conductor
The resistance of the line and circuit protective conductor
The resistance of the water and gas protective bonding
Which of the following would be the most appropriate cable for extending a domestic ring final circuit to provide a supply for new boiler?
Flat profile twin and CPC sheathed
Insulated wiring non-sheathed
Single-core thermoplastic
Multi-core flexible
Which of the following protective devices would need to be replaced in the event of an overload?
A cartridge fuse
An RCD
A circuit breaker
An RCBO
Which of the following is used to divide the electrical installation into circuits?
Consumer unit
Fused connection unit
Ring main circuit
Residual current device
Which of the following arrangements uses the same conductor as the neutral and earth within the supply part of the system?
TN-C-S
TT
TN-S
IT
When carrying out continuity testing which of the following describes the expected reading?
High ohms
Low Ohms
High meg ohms
Low meg ohms
What would the correct course of action be if a dangerous electrical fault is discovered when working on a domestic boiler supply?
Remove the suppliers cut out fuse
Finish the current task then fix the fault
Remove the dangerous circuit entirely
Inform the customer of the need to isolate the supply
Which of the following installation methods would be most appropriate for protection of flat profile twin and CPC cable on a wall?
Clip it directly to the wall
Install it in PVC conduit
Install it in PVC trunking
Install it in steel conduit
When checking that the electrical supply is dead it is essential to check between
Line and earth only
Line and neutral only
Line and neutral, line and earth only
Line and neutral, Line and earth, neutral and earth
