Question 1
Which instrument is most suitable for measuring the current flowing in a live feeder conductor without disconnecting it?
Question 2
During insulation resistance testing of a motor with a megohmmeter, one phase-to-ground reading is significantly lower than the others but still above the minimum recommended value. What should the electrician do?
Question 3
What does a continuity test primarily check for in an electrical conductor or circuit?
Question 4
You perform an insulation resistance test on a newly installed 600 V motor circuit using a megohmmeter. The reading between phase conductor and ground is very low. What should you do NEXT?
Question 5
Which instrument is most appropriate for verifying the insulation integrity of a 600V motor winding?
Question 6
Which instrument is predominantly used to test the insulation resistance of a motor winding?
Question 7
Which test instrument is most appropriate for verifying the integrity of conductor insulation in a 600V motor before commissioning?
Question 8
Which test instrument is most appropriate for measuring the insulation resistance of conductors in a 600V feeder system?
Question 9
Which instrument is most appropriate for verifying that a newly installed 600V feeder has no insulation breakdown before it is energized?
Question 10
Which instrument is used to measure the insulation resistance between conductors or between a conductor and ground?
Question 11
When performing an insulation resistance test (Megger) on a new 600V feeder, a reading of 'zero' ohms typically indicates which condition?
Question 12
Which test instrument is specifically designed to measure the integrity of conductor insulation by applying a high voltage?
Question 13
In residential construction, what is the main purpose of a vapour barrier around outlet and switch boxes on exterior walls?
Question 14
An ohmmeter is used on a de-energized circuit to perform which type of test?
Question 15
What effect does increasing the cross-sectional area of a conductor have on its resistance, assuming material and length stay the same?
Question 16
Which meter function should be used to safely verify the presence of voltage at a receptacle?
Question 17
Which test instrument is best suited to measure the insulation resistance of a feeder after installation?
Question 18
Which instrument is best for accurately measuring current flowing in a single conductor without disconnecting it?
Question 19
Which instrument is best suited for accurately measuring the resistance of a heating element when it is disconnected from power?
Question 20
Which instrument is BEST suited for measuring voltage in a live panelboard?
Question 21
Which instrument is BEST suited for measuring the current draw of a running motor without disconnecting conductors?
Question 22
A journeyperson is tracing circuits in an existing panel. Which tool is MOST appropriate to identify which breaker feeds a specific receptacle?
Question 23
A journeyperson is performing an insulation resistance test on a 480 V motor using a megohmmeter. Which procedure is MOST appropriate?
Question 24
Before performing an insulation resistance test on a motor using a megohmmeter, which action should the electrician take?
Question 25
What is the primary function of a megohmmeter (megger) when testing a motor winding?
Question 26
Which of the following is the standard method for determining if a motor's winding insulation has deteriorated due to moisture or age?
Question 27
When stripping insulation from a copper conductor, what is the best practice?
Question 28
When megger testing an existing feeder cable, the insulation resistance reading between phase and ground is much lower than expected. What is the most appropriate next step?
Question 29
Which test instrument is used to verify the insulation integrity of a motor winding?
Question 30
What is the primary purpose of a 'megger' (insulation resistance tester)?