Arkansas Boiler Operator Practice Exam

What is one common cause of boiler failure?

1. Excessive steam production

2. Improper water treatment leading to scale and corrosion

3. Insufficient fuel supply

4. Overuse of ash pits

The correct answer is: Improper water treatment leading to scale and corrosion

One common cause of boiler failure is improper water treatment, which can lead to scale buildup and corrosion. Water used in boilers typically contains impurities, such as minerals and oxygen, that can cause significant damage if not managed properly. When water treatment is inadequate, minerals like calcium and magnesium can precipitate and form scale on the boiler's heat exchange surfaces. This scale acts as an insulator, reducing the efficiency of heat transfer and leading to overheating and potential failure of the boiler components. Additionally, corrosion can occur when oxygen or other corrosive substances are present in the water, compromising the structural integrity of the boiler and ultimately causing leaks or catastrophic failures. Effective water treatment programs are essential to maintain the quality of the water used in the boiler, which helps to prevent these issues and prolong the lifespan of the boiler.