Inspection and Testing – Quiz 1 (2391)
Inspection & Testing Fundamentals
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1. Before conducting an insulation resistance test during an initial verification it is essential for the inspector to
Know the serial number of the test instrument used
Determine the value of the external loop impedance
Have details of any electronic equipment installed
Ask the client for permission to carry out the test
2. Which one of the following documents does not include model forms for certification purposes?
HSE Guidance Note GS38
IET On-Site Guide
IET Guidance Note 3
BS7671
3. The initial verification of an electrical installation must include
The provision of an operation manual
The cost implications of rectification
Details of the supplier of the installation materials
Comparison of the results with relevant criteria
4. Which of the following gives detailed guidance on the inspection and testing of an electrical installationllowing gives detailed guidance on the inspection and testing of an electrical installation
BS7671 Part 6
IET Guidance Note 3
HSE Guidance Note GS38
Electricity at Work Regulations
5. Which document is most appropriate for general information on constructing a simple electrical installation?
BS7671
IET On-Site Guide
IET Guidance Note 3
Electricity at Work Regulations
6. On completion of an initial verification of an additional new circuit, the inspector should provide
A Minor Electrical Installation Works Certificate
A Periodic Inspection Report
Relevant comments on the condition of the existing electrical installation
Details of departures to the Distribution Network Operator
7. The value of external loop impedance Ze has to be available to the person(s) carrying out an initial verification of an installation. This value is
Always greater than 1.0Ω
Recorded only if less than 0.8Ω
Obtainable by enquiry or measurement
Only obtainable from the client
8. A Minor Electrical Installation Works Certificate does not require a record of
System earthing arrangements
Departures from BS7671
Method of fault protection
Prospective fault current
9. During an initial verification the human senses of smell and touch would most likely detect
A poorly terminated conductor in a socket outlet
Inappropriate identification of conductors
A broken cpc
An overloaded central heating pump motor
10. Before initial verification of an addition to an existing installation is carried out, the occupier of the premises should
Be issued with a disclaimer in case of an accident caused by testing
Evacuate the premises before testing takes place
Receive a detailed account of the inspection procedure
Be informed that the inspection and testing is to take place
11. In a new bathroom installation where the only circuit is lighting, the pipework is plastic and the method of fault protection is ADS, there is no need to check for the presence of
An earthing conductor
Circuit protective conductors
Supplementary bonding conductors
Main protective bonding conductors
12. A human sense most appropriate during the initial verification would be
Touch
Taste
Intuition
None
13. Whilst conduction an initial verification of a new circuit it is noticed that an existing circuit is overloaded. The most likely human sense that would have revealed this condition is
Hearing
Taste
Touch
Smell
14. Under the requirements of the Electricity at Work Regulations inspectors must be able to
Produce evidence that their instruments are the latest models
Produce proof of an appropriate apprenticeship
Prove that they have a degree in electrical engineering
Demonstrate technical and practical knowledge of the inspection and testing process
15. A main protective bonding conductors connects
An exposed-conductive part to another exposed-conductive part
The main earthing terminal to the means of earthing
An exposed-conductive part to the main earthing terminal
Structural steelwork to the main earthing terminal
16. The test of separation between SELV circuits and circuits operating at 400 V is carried out using an insulation resistance tester set to
110 V
250 V
500 V
1000 V
17. When measuring the external earth fault loop impedance of an electrical installation, the earthing conductor must be
Connected to the protective conductors of the installation
Disconnected from the main protective bonding conductors only
Connected to the circuit protective conductors only
Disconnected from all the protective conductors of the installation
18. Which of the following tests would confirm the separation of SELV circuits from circuits operating at 230 V as required by BS7671?
Test voltage 250 V minimum resistance 0.25MΩ
Test voltage 250 V minimum resistance 0.5MΩ
Test voltage 500 V minimum resistance 0.5MΩ
Test voltage 500 V minimum resistance 1.0MΩ
19. The most likely method for compensating for the difference between normal operating temperatures and testing temperatures for earth fault loop impedance, is by
Applying a correction factor to the measured value
Applying a correction factor to the tabulated value
Testing the circuit whilst it is operational
Calibrating the instrument to compensate