WorksheetsCannock Electrical Fault Finding Quiz 2
Total questions: 27
Worksheet time: 53mins
Which of the following is NOT listed as useful documentation for fault finding?
Manuals or manufacturers data sheets
Wiring diagrams
Installation specification
User reviews
What is required if a fault is serious and needs a new part or an addition/alteration to an existing circuit?
A Major Electrical Installation Works Certificate
A Minor Electrical Installation Works Certificate
A Standard Compliance Form
A Warranty Extension
What can be a consequence of a plant not running due to a fault?
Decreased downtime while waiting for repairs.
Increased business opportunities.
A fault turning into a costly event.
Quick repair of the fault.
What may be lost due to abrupt power failure?
Business opportunities.
Electricians.
Valuable data.
Time spent on training.
If a fault occurs in a hospital, what may need to be organized?
Permanent repairs.
Temporary supplies.
Additional sales opportunities.
On-site training for electricians.
What is a potential consequence of fault diagnosis work in a domestic setting where a business is run from home?
Increased productivity due to work from home
No impact on the business operations
A prolonged period of downtime with potential loss of earnings
More efficient use of electricity
Why might fault diagnosis work be particularly dangerous for certain individuals in a domestic setting?
It can lead to an increase in electricity bills
It can cause inconvenience when hosting guests
It can be dangerous for the young or elderly who need light and heat
It can disrupt internet connectivity
What is advised if a client's premises has circuits that must be kept live during fault diagnosis work?
To wait for the fault to resolve on its own
To discuss some form of alternative supply options
To permanently shut down the affected circuits
To increase the electrical load on other circuits
What is the continuity test described by BS 7671 also known as?
A) A live test
B) A dead test
C) A basic test
D) An active test
Who should be given notice when performing a continuity test that involves isolation of the circuit?
A) The person conducting the test
B) Those who would be affected by the isolation of the circuit
C) The manufacturer of the test instrument
D) The local authorities
When is it permissible to remove earthing or bonding conductors for testing?
A) When the circuit is live
B) When the whole installation is switched on
C) When the whole installation is switched off
D) At any time during the test
What is classified as a 'dead test' in the context of the document?
A) A test performed after new installations
B) Insulation Resistance test
C) A test performed with a live circuit
D) A test to check the functionality of electronic equipment
When should the insulation resistance test have already been done according to the document?
A) After periodic testing
B) Before hand-over on new installations
C) When the installation has been in service for a number of years
D) After finding faults/hazards
What could periodic testing using an IR test instrument on existing installations reveal?
A) The cost of the installation
B) The age of the installation
C) Dangerous conditions that have built up over time
D) The efficiency of the installation
What should be done if the overall insulation resistance (IR) reading from a grouped test is lower than the minimum value stated in Table 61?
The reading should be ignored as it is expected to be low.
The circuits should be tested individually to find the low values.
The installation should be immediately shut down.
The minimum value in Table 61 should be adjusted.
Which instrument is used to carry out a 'dead test' for checking polarity?
Multimeter
Voltmeter
Low resistance ohmmeter
Ammeter
During which test can correct polarity be confirmed?
Insulation resistance test
Earth fault loop impedance test
Continuity test
Prospective fault current test
What should be ensured if an RCBO is used during the Earth loop impedance test?
The test instrument has a no-trip setting
The RCBO is of the correct color
The RCBO is fully charged
The RCBO is disconnected
What are the protective measures commonly used in the majority of installations to protect against electric shock?
Basic protection and automatic reconnection of supply
Basic protection and manual disconnection of supply
Basic protection and automatic disconnection of supply
Advanced protection and automatic disconnection of supply
What does insulation resistance testing verify?
The integrity of the fault protection
The condition of basic protection
The voltage level of the installation
The efficiency of the protective device
Why is the test of the earthing system particularly important for older installations?
Because they are more energy-efficient
Because they use outdated technology
Because some deterioration of the earthing system may have taken place
Because they are less likely to comply with BS 7671
What is the implication if the reading from the earthing system test does not comply with BS 7671?
The protective device will still disconnect within the correct time
The protective device will disconnect faster than required
It is unlikely the protective device will disconnect within the correct time
The protective device will not need to disconnect
What is one of the problems associated with RCD/RCBO devices?
Overheating
Nuisance tripping
Power surges
Short circuits
What is the remedy for a three-phase motor turning in the wrong direction?
Replacing the motor
Interchanging any two lines
Installing a new energy meter
Adjusting the motor speed
What must be done with the documentation for an electrical installation?
It should be updated and stored in a secure location
It can be discarded after the installation is complete
It only needs to be kept for a year
It should be handed over to the client and no copies kept
What should be ensured if an RCBO is used during the Earth loop impedance test?
The test instrument has a no-trip setting
The RCBO is of the correct color
The RCBO is fully charged
The RCBO is disconnected
Which member of the group is scared of the dark.
(but only when nobody else is in the room)
Charlie
Sam
Ace
Jak
