Ewrb exam - Study guides, Class notes & Summaries
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EWRB Theory Prep – MCBs Exam Questions And Answers
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EWRB Theory Prep – MCBs Exam Questions And Answers 
types of MCB trips - ANS-thermal 
magnetic 
thermal tripping - ANS-bi-metal strip, used for overload currents protection 
magnetic tripping - ANS-magnetic inductor, used for short circuit protection 
reset procedure - ANS-reset to OFF 
reset to ON 
arc containment includes - ANS-horns carry current to chute, allow arc to jump out 
arc chute lengthens distance for arc to travel 
oil suppresses arc 
splitter plates split the arc 
arc...
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EWRB theory prep – MCBs exam questions with answers
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EWRB theory prep – MCBs exam questions with 
answers 
types of MCB trips - ANSWERS thermal 
magnetic 
thermal tripping - ANSWERS bi-metal strip, used for overload currents protection 
magnetic tripping - ANSWERS magnetic inductor, used for short circuit protection 
reset procedure - ANSWERS reset to OFF 
reset to ON 
arc containment includes - ANSWERS horns carry current to chute, allow arc to jump out 
arc chute lengthens distance for arc to travel 
oil suppresses arc 
splitter pla...
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EWRB Theory Exam Prep LATEST 2024 UPDATE Questions and 100% Correct Answers
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EWRB Theory Exam Prep LATEST 2024 UPDATE Questions and 100% Correct Answers 
What is the minimum value of the permitted test result for the insulation resistance test of a three-phase, 400V, mains cable? - ANSWER 1MΩ 
 
When carrying out testing on a low voltage electrical installation, which document details the tests and checks required to be carried out? - ANSWER AS/NZS 3000 
 
What is the minimum or maximum test result value you would consider acceptable for an Earth Continuity...
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EWRB Theory Exam Prep questions with complete solution updated 2024/25
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These topics encapsulate the fundamental aspects of the EWRB Theory Exam, making them important for candidates. 
Knowledge of types of MCB trips, including thermal and magnetic tripping mechanisms, is essential for effective circuit protection 2. 
Understanding the minimum permitted test results for insulation resistance tests is crucial for ensuring safety and compliance
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EWRB THEORY PREP - MCBS EXAM QUESTIONS WITH ANSWERS 100% GUARANTEED PASS LATEST UPDATE
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EWRB THEORY PREP - MCBS EXAM QUESTIONS WITH ANSWERS 100% GUARANTEED PASS LATEST UPDATE 
types of MCB trips 
thermal 
magnetic 
thermal tripping 
bi-metal strip, used for overload currents protection 
magnetic tripping 
magnetic inductor, used for short circuit protection 
reset procedure 
reset to OFF 
reset to ON 
arc containment includes 
horns carry current to chute, allow arc to jump out 
arc chute lengthens distance for arc to travel 
oil suppresses arc 
splitter plates split the arc 
arc c...
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EWRB THEORY PREP RCD SPECS EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++
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EWRB THEORY PREP RCD SPECS EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ 
RCD type AC 
detects and prevents imbalances in AC 
RCD personal protection (type ii) 
30mA, 300ms 
RCD property protection (PRCD) 
300mA
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EWRB THEORY PREP - LOTO EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
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EWRB THEORY PREP - LOTO EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED 
LOTO 
Lock Out Tag Out 
examples for protective /isolating device 
Disconnect Switch, MCB, Line valves 
LOTO tags must _____ the employee 
IDENTIFY employee 
LOTO devices shall be standard 1,2,3 
1, colour 
2, shape 
3, size 
LOTO procedures can only b performed by ______ 
authorized employees 
4 stored energy sources include 
1, springs 
2, hydraulics 
3, tension 
4, electricity 
purpose of LOTO 
To prevent the...
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EWRB Theory Exam exam with complete solutions 2024_2025
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EWRB Theory Exam exam with complete solutions 2024_2025
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EWRB THEORY EXAM PREP STUDY GUIDE 100% PASS QUESTIONS WITH DETAILED ANSWERS | A+ GRADE ASSURED // LATEST
- Exam (elaborations) • 7 pages • 2024
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What is the minimum value of the permitted test result for the insulation resistance test of a three-phase, 400V, mains cable? - ANS 1MΩ 
 
When carrying out testing on a low voltage electrical installation, which document details the tests and checks required to be carried out? - ANS AS/NZS 3000 
 
What is the minimum or maximum test result value you would consider acceptable for an Earth Continuity test? - ANS 1Ω or less 
 
State TWO types of electrical protection provided by a RCBO...
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EWRB Theory Exam Prep Questions with Complete Solutions
- Exam (elaborations) • 10 pages • 2024
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EWRB Theory Exam Prep Questions with 
Complete Solutions
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