Question 261General Subjects - QMED70% to pass
Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by _______________.
AI Explanation
The correct answer is C) a liquid seal.
A liquid seal is used to prevent air leakage between the shaft and stuffing box packing in a centrifugal pump. The liquid seal, typically water, is introduced into the stuffing box and creates a barrier that prevents air from being drawn into the pump casing. This helps maintain the pump's efficiency and prevents cavitation issues.
The other options are incorrect because: A) lantern rings are used to distribute the packing compression evenly, not to create a seal; B) a compressed packing gland alone does not prevent air leakage; and D) the stuffing box gland is responsible for compressing the packing, not creating a liquid seal.
Related Questions
#259 A centrifugal bilge pump requires priming _______________.#260 The basic function of the centrifugal pump impeller is to _______________.#262 To prevent overheating and scoring of the shaft after repacking the stuffing box, which of the following procedures should be carried out? #263 A pump shaft that is bent or distorted should normally be _______________.#264 Why should the use of metallic or semi-metallic packing hooks or pullers be avoided on bronze or brass shafts, rods, plungers, or sleeves?