Question 222Steam Plants - Assistant Engineer

The correct answer is D) High temperature castable refractory. High temperature castable refractory is the correct choice because it is a material that can be easily applied and set quickly to repair both burner openings and gas baffles when drying and baking are impractical or time is not available. Castable refractories are a type of heat-resistant material that can withstand high temperatures and are commonly used for repairing and maintaining various components in heating systems and appliances. The other options, such as baffle mix, plastic chrome ore, and plastic fire clay, may not have the same level of heat resistance or the ability to be quickly applied and set, making them less suitable for this type of repair work.