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Question
If using air tanks with manually operated drains, how often should you drain the tanks?
Answers
A.  Every day
B.  Once a week
C.  Once a month
D.  Once every 3,000 miles
Explanation
To prevent the build up of oil and water in a vehicle's air tanks, manually operated air tank drains should be used at the end of each day of driving.
Answer Statistics
12.18 % of our users get this question wrong.
This question's difficulty is Medium

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