INSPECTION AND TESTING
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This document provides practice questions and accurate answers for the 2391 Inspection and Testing written exam. It covers essential electrical testing principles including insulation resistance testing, continuity testing, earth fault loop impedance, polarity checks, RCD testing, and safe isolation procedures. 
 
Designed as a revision aid for electrical installation candidates, the material focuses on key theory concepts, testing procedures, and interpretation of results in line with BS 7671 r...
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INSPECTION AND TESTING•INSPECTION AND TESTING