While underway on a steam ship, the engineer on watch reports a loss of oil flow in the oil head tank bull's eye. Which of the following should be done?
• Purpose of the lube oil head tank in a steam ship propulsion system • What a loss of visible flow in the bull's eye (sight glass) usually indicates about oil circulation and pressure • Consequences of inadequate lubrication to main bearings and shafting while underway
• Ask yourself: If the oil no longer appears to flow in the head tank bull's eye, what might be happening to the lubrication of the main engine shaft and bearings? • Which option focuses on protecting the main engine and shaft from damage due to possible oil starvation, rather than dealing with unrelated systems like boiler feedwater? • Which action would be most urgent to prevent severe machinery damage, assuming the indication is correct and not a gauge failure?
• Verify which choice directly addresses potential loss of lube oil supply to the shaft/bearings. • Check which options involve systems not directly related to the lube oil head tank (for example, boiler feed systems vs. main engine lubrication). • Consider which action you would take immediately to prevent damage, even before full troubleshooting, if you suspected actual loss of lubrication.
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