Which of the following is a key requirement of a good boiler?

A key requirement of a good boiler is safety and efficiency in operation. Safety is crucial to prevent accidents such as explosions or leaks, which can pose significant risks to personnel and property. Various safety features, such as pressure relief valves and automatic shut-off mechanisms, are essential in ensuring safe operation.

Efficiency is equally important, as it directly impacts the boiler's performance and operational costs. An efficient boiler maximizes heat output while minimizing fuel consumption, which not only saves money but also reduces environmental impact. By operating within optimal efficiency parameters, a boiler can effectively transfer energy and maintain a stable and steady output of steam or hot water for various applications.

Focusing on safety and efficiency aligns with industry standards and regulations, which are designed to protect both individuals and the environment. Therefore, these factors are critical when assessing or designing a boiler, making them a defining characteristic of good boiler operation.