| As shown in figure "A" of the illustration, under what conditions is the test proving unit used in conjunction with the high voltage probe? |
| A) before using the probe each time for detecting the presence of and verifying the absence of voltage only |
| B) after using the probe each time for detecting the presence of and verifying the absence of voltage only |
| C) before and after using the probe each time for detecting the presence of and verifying the absence of voltage only |
| D) whenever it is suspected that the probe is not accurately detecting the presence of voltage |
