Question 173Steam Plants - Assistant Engineer70% to pass
Under otherwise normal steaming conditions, an abnormally high temperature at the superheater outlet of a single furnace boiler would indicate _______________.
AI Explanation
The correct answer is D) poor heat transfer in feed water heaters.
An abnormally high temperature at the superheater outlet of a single furnace boiler would indicate poor heat transfer in the feed water heaters. This is because the feed water heaters are responsible for transferring heat from the steam or exhaust gases to the feed water, increasing the temperature of the feed water before it enters the boiler. If the heat transfer in the feed water heaters is poor, less heat will be absorbed by the feed water, leading to a higher temperature at the superheater outlet.
The other options are incorrect because they do not directly explain the abnormally high temperature at the superheater outlet. High steam demand (A), insufficient combustion air (B), and excessive steam supply to fuel oil heaters (C) would not necessarily cause this specific issue.
Related Questions
#171 The automatic recirculating valve in the main condensate recirculating line is controlled by a temperature sensor which is located at the _______________.#172 Insufficient combustion air supply to the furnace would cause _______________.#174 Which of the listed conditions can cause high superheater outlet steam temperature in an automated boiler? #175 If a pressure drop does not exist across the superheater in a steaming boiler _______________.#176 A heavy accumulation of soot on the fireside of the superheater can cause a _______________.