Question 489Electricity & Electronics - QMED
70% to passIn order to definitively determine whether or not fuse "2", shown in the illustration is blown using an on-line testing technique, across what points would you connect the voltmeter leads? Illustration EL-0062
Athe bottom of fuse "2" to the top of either fuse "1 or 3"
Bthe bottom of fuse "2" to the bottom of either fuse "1 or 3"
Cthe top of fuse "2" to the bottom of either fuse "1 or 3"
Dthe top of fuse "2" to the top of either fuse "1 or 3"
AI Explanation
The correct answer is A) the bottom of fuse "2" to the top of either fuse "1 or 3". To definitively determine if fuse "2" is blown, you would need to measure the voltage drop across the fuse. By connecting the voltmeter leads from the bottom of fuse "2" to the top of either fuse "1 or 3", you can directly measure the voltage across fuse "2". If the voltage reading is zero, then fuse "2" is blown. The other options would not provide a direct measurement of the voltage drop across fuse "2" and would therefore not be the best way to determine if it is blown.
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