Ewrb theory exam exam - Study guides, Class notes & Summaries
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EWRB theory prep – MCBs Exam Questions with Complete Solutions
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EWRB theory prep – MCBs Exam 
Questions with Complete Solutions
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EWRB theory prep – LOTO Exam Questions with Complete Solutions
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LOTO - ANSWER Lock Out Tag Out 
examples for protective /isolating device - ANSWER Disconnect Switch, MCB, Line 
valves 
LOTO tags must _____ the employee - ANSWER IDENTIFY employee
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EWRB Theory Exam Questions with Complete Solutions
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What does BJT stand for? - ANSWER Bipolar Junction Transistor 
What does the transducer do? - ANSWER converts energy from one form to another 
State one factor that determines voltage drop - ANSWER Length of cable 
State one reason why a class 1 electrical appliance is set at a maximum of 1 ohm - 
ANSWER It prevents the touch voltages rising to dangerous levels 
State the test voltage used for carrying out an insulation resistance test. - ANSWER 
500V DC
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EWRB theory prep – MCBs Exam Questions with Complete Solutions
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types of MCB trips - ANSWER thermal 
magnetic 
thermal tripping - ANSWER bi-metal strip, used for overload currents protection 
magnetic tripping - ANSWER magnetic inductor, used for short circuit protection 
reset procedure - ANSWER reset to OFF 
reset to ON
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EWRB THEORY PREP EXAM BRAND NEW EXAM(LATEST UPDATE 2024-2025)|VERIFIED EXAM QUESTIONS AND CORRECT ANSWERS ALL GRADED A+|GUARANTEED SUCCESS
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EWRB THEORY PREP EXAM BRAND NEW EXAM(LATEST UPDATE )|VERIFIED EXAM QUESTIONS AND CORRECT ANSWERS ALL GRADED A+|GUARANTEED SUCCESS 
 
 
 
 
 
 
 
 
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 ...
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EWRB THEORY EXAM PREP (2024) LATEST QUESTIONS & ANSWERS (GRADED A+)
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EWRB THEORY EXAM PREP (2024) LATEST QUESTIONS & ANSWERS (GRADED A+) 
types of MCB trips - correct answer>>>thermal 
magnetic 
 
thermal tripping - correct answer>>>bi-metal strip, used for overload currents protection 
 
magnetic tripping - correct answer>>>magnetic inductor, used for short circuit protection 
 
reset procedure - correct answer>>>reset to OFF 
reset to ON 
 
arc containment includes - correct answer>>>horns carry current to chute, all...
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EWRB THEORY EXAM PREP LATEST QUESTIONS & ANSWERS VERIFIED 100% CORRECT (2024)
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EWRB THEORY EXAM PREP LATEST QUESTIONS & ANSWERS VERIFIED 100% CORRECT (2024) 
 
 
 What is the minimum value of the permitted test result for the insulation resistance test of a three-phase, 400V, mains cable? - Correct Answer 1MΩ 
 
When carrying out testing on a low voltage electrical installation, which document details the tests and checks required to be carried out? - Correct Answer AS/NZS 3000 
 
What is the minimum or maximum test result value you would consider acceptable for an ...
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EWRB theory prep – MCBs EXAM well updated 2024 with questions and correct answers
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EWRB theory prep – MCBs EXAM well updated 2024 with questions and correct answers 
 
 
 
 
circuit breaker purpose - CORRECT ANSWERdetect SC/OL and break contact on fault detection 
 
at short circuit, PSCC fault occurs, what operating mechanism is used - CORRECT ANSWERmagnetic field 
 
two operating mech. of MCB is - CORRECT ANSWERmagnetic and thermal 
 
bedroom lighting MCB - CORRECT ANSWER16C for bedroom lighting 
 
powerpoints MCB - CORRECT ANSWER32/20C for powerpoints and appliances, e.g....
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