Industrial Maintenance Technician Practice Test 2025 – Your All-in-One Guide to Exam Success!

A gas water heater requires a variety of maintenance tasks to ensure its efficiency and longevity, making "all of the above" a comprehensive choice.

Flushing the tank is important as it removes sediment buildup that can reduce the efficiency of the heater and potentially lead to damage over time. Sediment can also create hot spots on the tank lining, which can result in premature failure.

Replacing the anode rod is another critical maintenance task. The anode rod helps prevent corrosion inside the tank by attracting corrosive elements in the water. Over time, this rod wears down and needs to be replaced to prolong the life of the water heater.

Lastly, checking the venting system is essential for safety and efficiency. Gas water heaters require proper venting to ensure that combustion gases are expelled safely outside and to maintain optimal operating conditions. A blocked or malfunctioning vent can lead to dangerous situations, such as carbon monoxide buildup.

By addressing all these maintenance areas, you can help ensure that a gas water heater operates safely and effectively for its full lifespan.