Question 167Electricity & Electronics - 1st Asst/Chief
70% to passPrior to using an analog multimeter set up as an ohmmeter, the leads are purposely shorted together. Which of the following actions should be taken if, when adjusting to 'zero' ohms, the indicating needle cannot be returned to 'zero' on the scale?
The correct answer is D) The batteries should be replaced. When using an analog multimeter set up as an ohmmeter, the leads are purposely shorted together to adjust the meter to read '0' ohms on the scale. If the indicating needle cannot be returned to '0' when the leads are shorted, it indicates that the battery in the multimeter is low and needs to be replaced. This is because the internal resistance of a weak battery can prevent the ohmmeter from accurately reading '0' ohms when the leads are shorted. The other answer choices are incorrect because they do not address the root cause of the issue, which is a low battery. Adjusting the readings or replacing the lead clips will not resolve the problem if the battery is the source of the issue.
Ready to test your knowledge?
Take a Electricity & Electronics - 1st Asst/Chief Practice ExamWant to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App