Question 77Electricity & Electronics - 1st Asst/Chief

70% to pass

When using an ohmmeter to test a semiconductor diode, you find a low resistance in both the forward and reverse bias directions. What condition does this indicate?

Aan open
Bgood resistive quality
Ca short
Dgood capacitive quality
AI Explanation

The correct answer is C) a short. When testing a semiconductor diode with an ohmmeter, a low resistance in both the forward and reverse bias directions indicates that the diode is shorted. This means the diode has a direct connection between its anode and cathode, bypassing the p-n junction that normally allows current to flow in only one direction. The other answer choices are incorrect because: A) an open would indicate no continuity or infinite resistance, B) good resistive quality would show high resistance in the reverse bias direction, and D) good capacitive quality is not the correct interpretation for a low resistance reading in both directions.

Related Questions
Q247:How is the main shaft rotation on an AC diesel-electric propulsion vessel normal... Q159:What is the maximum current allowed to be drawn from the secondary of a 2 kVA s... Q131:Which of the listed types of lighting fixtures does the diagram shown in figure ... Q65:A fuse is the most common type of protection against a short-circuit fault in LV... Q190:What damage may occur to the components of a winch master control switch, if the...

Ready to test your knowledge?

Take a Electricity & Electronics - 1st Asst/Chief Practice Exam
Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
← Previous All Questions Next →

Pass Your Coast Guard Licensing Exams!

Study offline, track your progress, and simulate real exams with the Coast Guard Exams app

Download on App Store Get it on Google Play Download for Mac