Insulation resistance test set question

[mkennedyShermco]

This is the correct answer. The following answer to this question is being marked as "incorrect".

Basic Test Equipment
You examine a test instrument commonly used to measure insulation resistance on equipment rated 600V or lower. The output of the test instrument is 1000 volts and the lead connections are?

Your Answer: Positive, negative, guard
Help: Basic Test Equipment: Insulation Resistance Tester

[wrh9278]

Not necessarily. The phrase "commonly used to measure insulation resistance on equipment rated 600V or lower" makes me think the question is referring to a handheld megohmetter, which generally does not include a guard terminal.

[rofo42]

Not necessarily. The phrase "commonly used to measure insulation resistance on equipment rated 600V or lower" makes me think the question is referring to a handheld megohmetter, which generally does not include a guard terminal.

This sounds correct to me given the wording of the question.