Which of the following can lead to improper boiler operation?

Excessive moisture in steam can significantly impact boiler operation. When steam contains a high level of moisture, it leads to a reduction in thermal efficiency and can cause issues such as corrosion, erosion, and water hammer in the system. These problems can result in improper heating, increased wear and tear on components, and even operational failures. The presence of moisture prevents the steam from delivering energy effectively, reducing the overall performance of the boiler and potentially leading to safety hazards. Proper steam should be dry to ensure efficient transfer of heat and maintain the integrity of the boiler system.

In contrast, correctly calibrated gauges, regular maintenance checks, and proper fuel quality contribute positively to boiler operation. Calibrated gauges ensure accurate readings of pressure and temperature, regular maintenance helps to keep the system running smoothly and prevent issues from becoming serious, and quality fuel is necessary for efficient combustion. Each of these elements supports proper boiler operation rather than leading to complications.