Fault Finding Quiz

When initially discussing the work involved in fault finding with the client, an area of consideration should be

• access arrangement

• availability of parts required

• total cost

• materials required

A fault has been reported on a bottling 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 manufacturer's 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

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

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 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

When communicating with a client, information should always be

• written

• verbal

• technical

• clear and courteous