Coast Guard Exams
Question 157Electricity/Electronics - QMED70% to pass

As shown in figure "A" of the illustrated digital multimeter screen, what would be the significance of the symbol indicated by "2" being illuminated? Illustration EL-0047

Diagram for question 157
AI Explanation
The correct answer is C) the selector switch is in the continuity/diode test position and the secondary function push button is toggled for diode. The illumination of the "2" symbol on the digital multimeter screen indicates that the meter is in the diode test mode. In this mode, the multimeter applies a small voltage across the test leads and measures the voltage drop, which can be used to test the condition of a diode. This is the secondary function of the multimeter, which is accessed by toggling the secondary function push button. The other answer choices are incorrect because they do not accurately describe the conditions indicated by the "2" symbol. Option A is incorrect as the resistance measurement mode does not have a specific symbol like "2". Option B is incorrect as the continuity test mode would be indicated by a different symbol. Option D is incorrect as the resistance measurement mode does not have a specific diode testing function.