Question 741Deck Safety70% to pass
If the meter needle of the oxygen indicator cannot be set to zero, what should be done?
AI Explanation
The correct answer is C) Replace the batteries.
If the meter needle of the oxygen indicator cannot be set to zero, this typically indicates an issue with the power supply or batteries powering the device. The oxygen indicator relies on a stable power source to provide accurate readings. If the batteries are low or failing, it can cause the needle to be unable to properly calibrate to zero. Replacing the batteries is the appropriate step to resolve this issue and restore the oxygen indicator to proper working order. The other options, such as adjusting the reading or checking for blockages, do not address the root cause of the problem, which is the power supply.
Related Questions
#739 When using the oxygen indicator, which reaction from the needle should you expect as a sample is drawn into the instrument? #740 You are using an oxygen indicator. How long should you wait after the sample is drawn into the instrument before reading the meter? #742 What is used to test a tank for oxygen content? #743 Combustible gas indicators operate by drawing an air sample into the instrument _______________.#744 Before entering the chain locker, you should _______________.