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WorksheetsFDRP2
Total questions: 20
Worksheet time: 20mins
When initially discussing the work involved in fault finding with the client, an area of consideration should be?
access arrangements
availability of parts required
total cost
materials required
A fault has been reported on an unfamiliar machine. Which information would be of most use in fault finding?
The Electrical Installation Certificate
Maintenance records
The workers using the equipment when it went wrong
The manufacturers instructions
When preparing to work on a three-phase pillar drill, the number of tests required to prove isolation has been correctly completed is?
3
9
10
12
Which of the following information is not required when diagnosing a fault on a circuit that has no previous certificates in place?
The existing Electrical Installation Certificate
Events leading up to the fault
Maintenance records
The manufacturers instructions
A component has been identified as the cause of the fault but is not a stock item and requires ordering. What information should be given to the client?
The supplier’s phone number to chase delivery
The expected delivery/repair date
The part number of the item ordered
The way to bypass the faulty part, although safety will be impaired
An upgraded piece of equipment has been installed but repeatedly after 25 minutes of running, it trips out the circuit breaker. What is the most likely fault?
A short circuit
An overload
An undervoltage
A fault to earth
A customer has had new USB sockets fitted in the kitchen but can now hear a crackling noise. What is the most likely cause?
An insulation resistance fault between neutral and earth
An overvoltage outside the specification of the socket installed
A loose connection
Overloading the socket
An area in a factory has been subjected to a flood and you are working with two other colleagues to replace damaged equipment. To ensure the supply is safely isolated, which of the following should you do?
Isolate the supply and keep the key yourself, as you are the senior electrician on site
Isolate the supply and put the key somewhere you can all access it in case any of you need to re-energise the supply
Fit a lock with multiple keys so you can all re-energise the supply
Fit a multi-lock adaptor and all fit individual locks and retain your own keys
After diagnosing a fault as a damaged length of cable between two socket outlets, a new length of cable is installed. What documentation should be completed?
A minor works certificate
An Electrical Installation Certificate
A condition report
A schedule of test results
An RCD is tripping out. What is the cause of the fault?
A fault to earth
A short circuit between line and neutral
An overload of the circuit
Undervoltage
A test has been completed on a circuit that has tripped out the circuit breaker, and a reading was found of 0.7MΩ between line and neutral. What is the most likely cause of this reading?
A short circuit between the conductors
A wire has become disconnected for an accessory
Something is still connected, such as a neon indicator
Nothing is wrong – 0.7MΩ is usual and acceptable
The test instruments used for fault diagnosis should be?
a multi-meter that allows a range of tests to be completed
approved by the client as suitable to be used on their installation
less than 12 months old
calibrated and checked prior to use
The client informs you that the supply to a piece of equipment cannot be isolated as it will affect other machinery and you should work on it live. What should you do?
Report the client to the HSE for suggesting an unsafe work procedure
Make arrangements for isolating the supply at a mutually convenient time, such as out-of-hours
Work live anyway
Tell the client to find someone else to work on the equipment
A client has had a relative fit a new light fitting, purchased from the local DIY store. However, every time the light is switched on, the circuit trips out. What is the most likely cause?
The connections have been incorrectly made and a short circuit occurs when the switch is turned on
The light fitting is faulty
The circuit is now overloaded
The light fitting is not designed for a domestic installation
What is the final test to be completed after rectification of a fault?
Insulation resistance
RCD test
Functional test
Circuit breaker operating current test
An earth fault loop impedance test has been completed on a circuit and the reading is found to be 2.34Ω. GN3 tells you the maximum reading should be 1.8Ω. What is the implication of this?
The equipment will not operate correctly
The equipment will operate but the manufacturer’s warranty is now invalid
The equipment will intermittently trip out
The protective device will not operate quickly enough to comply with BS 7671 in the event of an earth fault
When lone working, others should be aware of your location, the time the activity is likely to take and what else?
Ensure the bill for the client is correct for the time taken
Enable the office to plan your next job knowing where you are and when you will finish
Ensure your health and safety and check up on you
Make sure you haven’t gone home
An item of equipment you have isolated has a notice stating also supplied from a UPS. UPS stands for?
untested portable supply
uninterruptible power supply
unified power supply
underground power supply
An RCD protecting sockets in a computer suite intermittently operates when busy. What is a possible cause?
A cumulative effect of earth leakage from multiple PCs
An intermittent fault on one PC
An overload when too many PCs are turned on
Inrush current due to the power supplies in the PCs turning on together
When communicating with a client, information should always be
written
verbal
technical
clear and courteous
