Question 179Steam Plants - 1st Asst/Chief70% to pass
The leakage of air into the pump casing by way of the packing gland of a condensate pump is prevented by _______________.
AI Explanation
The correct answer is D) a water seal line to the packing gland.
The leakage of air into the pump casing is prevented by a water seal line to the packing gland. The water seal creates a positive pressure that prevents air from being drawn into the pump suction, which would decrease the pump's efficiency. This water seal is a common feature in the design of condensate pumps to maintain the integrity of the pump's operation.
The other options are incorrect because: A) the vacuum in the pump suction alone is not sufficient to prevent air leakage, B) special packing in the stuffing box does not actively create a seal, and C) an air seal line from the compressed air line would introduce air into the system, which is the opposite of what is required.
Related Questions
#177 The flash point of a residual fuel oil should be used to determine the highest temperature to which the oil may be heated _______________.#178 Which of the significant combustible elements of fuel oil is a major source of boiler corrosion? #180 Condensate pumps have distinctly noticeable characteristics and can usually be recognized by their _______________.#181 In a main propulsion steam turbine installation, the condensate pump initially discharges to the _______________.#182 If it should become necessary to abandon a compartment because of the danger of a large steam leak on a boiler, which of the following actions represents the best avenue of escape?