Question 1518 Deck General

The correct answer is A) They should be inspected and tested periodically to ensure that the insulation is clean and in good condition. This is correct because insulating flanges are used to prevent galvanic corrosion between dissimilar metals. Over time, the insulation on these flanges can become damaged or contaminated, reducing their effectiveness. Periodic inspection and testing is required to ensure the insulation is functioning properly and the flange is providing the necessary electrical isolation. The other options are incorrect because: B) Hot work should not be performed on deck without proper safety precautions, regardless of the presence of an insulating flange. C) Switching off a cathodic protection system is not an acceptable substitute for using an insulating flange. D) There is no specific resistance value requirement for insulating flanges, as long as the insulation is effective in providing the necessary electrical isolation.