Question 88Steam Plants - Assistant Engineer70% to pass
If a boiler is brought on the line with its steam pressure much higher than that of the boiler already on the line, there is danger of _______________.
AI Explanation
The correct answer is D) priming and carryover.
When a boiler with higher steam pressure is brought online while another boiler with lower steam pressure is already operating, there is a risk of priming and carryover. Priming is the rapid entrainment of boiler water into the steam, which can lead to water droplets being carried over into the steam system. This can cause damage to equipment and pose a safety hazard. The pressure differential between the two boilers can drive this undesirable condition, which is why it is important to carefully manage boiler pressures when bringing additional units online.
The other answer choices are incorrect because:
A) Low water is not directly related to the pressure differential between boilers.
B) An overloaded superheater is not a concern in this scenario.
C) Thermal shock is not the primary issue when boilers with different pressures are brought online together.
Related Questions
#86 When raising steam on an idle boiler and the steam pressure has risen to about 5 pounds more than the pressure of the boiler already on the line, you can _______________.#87 After steam has been raised and a boiler is being placed on the line, the superheater vent can be closed when _______________.#89 When preparing to cut a boiler in on the line, you determine that the steam pressure of the incoming boiler is about 5 psig above line pressure. Which of the following steps should you take next? #90 The time taken to raise steam on a cold boiler should always be _______________.#91 When raising steam on a cold boiler under normal conditions, you should always _______________.