Question 345Steam Plants - Assistant Engineer70% to pass
The net positive suction head of a boiler centrifugal feed pump should be calculated over and above the _______________.
AI Explanation
The correct answer is C) feed water vapor pressure.
The net positive suction head (NPSH) of a boiler centrifugal feed pump should be calculated over and above the feed water vapor pressure. This is because the NPSH represents the minimum pressure required at the pump inlet to prevent cavitation, which can occur when the pressure drops below the feed water vapor pressure. Calculating the NPSH in this manner ensures that the pump operates safely and efficiently, preventing damage and maintaining proper boiler operation.
The other answer choices are incorrect because they do not directly relate to the critical factor of feed water vapor pressure in determining the required NPSH for the pump.
Related Questions
#343 Which of the listed systems would be a potential source for the high-pressure drain system? #344 Clean low-pressure steam drains are collected in the _______________.#346 The boiler feed water control valve varies the unity relationship between steam and water flow during periods of _______________.#347 Deaeration of condensate primarily occurs in what section of the illustration shown? Illustration SG-0010 #348 Which of the following is the advantage of operating a typical closed feed water system for a marine boiler when compared to an open feed water system?