PA INSPECTION AND TESTING QUESTIONS AND ANSWERS 100% CORRECT

PA INSPECTION AND TESTING QUESTIONS AND ANSWERS 100% CORRECT .Test probes and leads for safe isolation must comply with - ANSWER-Gs38 .To ensure all systems within a building work as they were intended is one deinition of the purpose of - ANSWER-Commissioning electrical systems .What is required before inspection can be carried out - ANSWER-Earthing system Maximum demand Supply characteristics .Most important to verify initial verification - ANSWER-Basic protection Equipment suitability Termination of conductors and cable selection .Most important in establishing safety - ANSWER-Fault protection Basic protection .First test on initial verifacation - ANSWER-Continuity of protective conductors .What voltage used when calculating resistance of supplementary bonding conductors - ANSWER-50 v .Testing 230v installation, insulation resistance tester must be set to a voltage of... - ANSWER-500v .Value of a satisfactory insulation resistance test on each final circuit of a 230v installation must be - ANSWER-No less than 1Mohm .Instrument calibration certifates valid.. - ANSWER-1 year .Correct order for requirements regarding dead test - ANSWER-CIP (alphabetical order) .To obtain R1 + R2 in a ring circuit the R1 + R2 measurements need to be - ANSWER-Divided by a factor of 4 .For pvc flat profile cables aside from 1mm2 the resistance value of the live conductors with the respect to cpc is equivalent to - ANSWER-Ratio of 1.67, readings MORE than line and neutral conductors .One objective of dead polarity test is to verify - ANSWER-Lamp holders centre contact is connected to line conductor .Connecting circuits in parallel will - ANSWER-Reduce total resistance .Increasing length of circuit will - ANSWER-Reduce its insulation resistance .What should be considered before insulation resistance test - ANSWER-All loads and capacitors removed Value of supply voltage .Definition of polarity - ANSWER-Functional switching takes place thought the line conductor .Total earth loop impedance can be obtained by - ANSWER-Measuring Zs Measuring Ze and R1 and R2 Inquiry of ze and measuring of R1 and R2 .Live polarity tests are carried out by connecting across which line conductors - ANSWER-Line and line .To ensure breaking capacity of a cb is met what human senses should be used - ANSWER-Touch and sight .Recommended maximum inspection and re test for a domestic electrical installation is - ANSWER-10 years .What should be issued after the completion of two small additions to and excising circuit - ANSWER-Minor works .Following completion of a new installation what must be issued - ANSWER-Electrical installation certificate .Following completion of an installation - ANSWER-Inspector keeps copy Customer given copy .To confirm isolation has been achieved tests must be carried out on - ANSWER-All live conductors and earth .When does inspection of a new installation begin - ANSWER-When construction starts .Information on requirements for testing can be found in bs7671 part - ANSWER-6 .BS7671 identifies requirements for initial verification in chapter - ANSWER-61 .Supplementary bonding conductors should be inspected to ensure they connect - ANSWER-Exposed and extraneous conductive parts .Maximum distance from any corner of a wall for prescribed zone is - ANSWER-150mm .Inspection of appropriate functional switching devices would include a - ANSWER-Light switch .Total number or tests when confirming safe isolation of a three phase and neutral isolator - ANSWER-10 .What appendices can the standard forms of certifications be found in - ANSWER-6 .Document on completion of periodic inspection - ANSWER-Electrical installation condition report .Correct colour of line conductors on a single phase circuit - ANSWER-Brown .Flat profile twin and circuit protective conductor cable without mechanical protection concealed within the walls of a dwelling should be inspected to ensure they are in prescibef zones and protected by - ANSWER-30 amp residual device .Inspection of appropriate devices for isolation and switching would include a - ANSWER-Main isolator .When testing continuity the resistance of the test leads should be nulled or - ANSWER-Subtracted from the results .Reg 13 - ANSWER-Precautions for work on equipment made dead .Reg 14 - ANSWER-Work on or near live conductors .Reg 15 - ANSWER-Working space access and lighting .Reg 16 - ANSWER-Persons to be competent to prevent danger .Initial verifacation - ANSWER-During erection/completion of an installation or an addition before it's put into service appropriate inspection and testing should be put into place To verify that a new electrical installation complies with the design and is sage to place into service .Safe isolation procedure - ANSWER-Permission Select approved lamp or testing device Locate and identify equipment being worked upon Identify means of isolation Subside isolation of circuit