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Inspection and Testing 2391/5357 Mock 2
Use this to test your knowledge of 5357 unit 112 and 2391-51
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1. Which of the following is the maximum voltage above which test leads must comply with GS38? *
1 point
2. Which of the following requirements from GS38 applies to test equipment which requires more than one test lead? *
1 point
3. Which of the following correctly describes the purpose of a continuity of ring final conductors test? *
1 point
4. A test for continuity of circuit protective conductors is carried out at every point on a circuit. Which of the following describes the purpose of the test? *
1 point
5. Which of the following factors directly affects the conductor resistance of a cable? *
1 point
6. Two identical cables are connected in parallel. Which of the following describes the effect on the combined conductor resistance compared to the single cable? *
1 point
7. Which of the following factors affect the insulation resistance of a cable? *
1 point
8. Four identical circuits are connected to a distribution board. Which of the following describes the effect on the combined insulation resistance at the DB when compared to that of a single circuit? *
1 point
9. Look at the figure below, which of the following describes the result of a line to earth fault at the load of the circuit? *
1 point
Captionless Image
10. Which of the following instruments must be used to measure the earth electrode resistance for a standby generator? *
1 point
11. Which of the following describes the connection arrangements at the incoming DNO terminals for the earthing conductor in a 230V single phase TN-C-S supply? *
1 point
12. Which of the following is NOT a method used to determine that A.D.S for a final circuit has been achieved? *
1 point
13. The purpose of the measurement of prospective fault current at the origin of an electrical installation is to determine whether: *
1 point
14. Which of the following is not a method for determining the prospective fault current at the origin of an installation? *
1 point
15. Which of the following correctly describes the relationship between prospective fault current and the fault current rating of a BSEN 60898 circuit breaker. *
1 point
16. Which of the following protective devices is not suitable to be used to disconnect fault currents in excess of 10KA? *
1 point
17. A 100 mA BSEN 61008 RCD is installed in a TT installation to provide fault protection. Which of the following identifies the maximum test current to be applied and the maximum disconnection time at that test current when testing the RCD? *
1 point
18. A 30mA BSEN 61009 RCBO is installed on a socket outlet circuit to provide additional protection. Which of the following identifies the maximum test current to be applied and the maximum disconnection time at that test current? *
1 point
19. Which of the following is not a suitable method of confirming phase sequence? *
1 point
20. The purpose of a functional test on an RCD carried out quarterly, using the integral test button, is to confirm? *
1 point
21. A test is carried out on the interlock for switching an alternative power supply. Which of the following is the type of test being undertaken? *
1 point
22. Following a test of earth fault loop impedance (Zs) the results are compared with the values given in BS7671. Which of the following describes the purpose of this comparison? *
1 point
23. Checking that the measured test results meet the required values will enable the inspector to confirm that the electrical installation is. *
1 point
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