Question 262General Subjects - QMED70% to pass
To prevent overheating and scoring of the shaft after repacking the stuffing box, which of the following procedures should be carried out?
AI Explanation
The correct answer is D) Tighten the packing in small increments while the pump is operating.
This is the correct procedure to prevent overheating and scoring of the shaft after repacking the stuffing box. Tightening the packing gradually while the pump is running allows the packing to properly seat and seal around the shaft, preventing excessive friction and heat buildup. The other options are incorrect because: A) Running the pump slowly with oil may not properly seat the packing, B) Fully tightening the gland can over-compress the packing, and C) Lubricating the lantern ring is not the primary step to prevent overheating.
Related Questions
#260 The basic function of the centrifugal pump impeller is to _______________.#261 Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by _______________.#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? #265 When renewing spiral packing in a centrifugal pump stuffing box, after the packing is firmly seated, the packing gland nuts should be _______________.