🔍 Key Concepts

• Proper procedure for tightening packing in a stuffing box on a pump shaft • Purpose of allowing a controlled leakage through new packing to provide cooling and lubrication • Effects of over-tightening packing on shaft wear, friction, and overheating

💭 Think About

• When new packing is installed, what has to happen to keep the shaft and packing cool while they "bed in"? • Which choice allows you to gradually control how tight the packing is while observing temperature and leakage? • Which options would likely cut off cooling flow or lubrication and cause rapid heating or scoring of the shaft?

✅ Before You Answer

• Identify which option allows gradual tightening with the pump running so you can monitor temperature and leakage. • Eliminate any choice that suggests fully tightening at once before operation, as this can cause overheating. • Look for the procedure that results in a slight, steady drip from the stuffing box, indicating proper lubrication and cooling.