Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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How are the piston rods of a duplex direct-acting feedwater pump typically lubricated?

Through continuous lubrication systems
By means of a bottle oiler
With grease applied manually
By external oil pumps

The correct answer is: By means of a bottle oiler

The correct method for lubricating the piston rods of a duplex direct-acting feedwater pump typically involves the use of a bottle oiler. This approach is effective because bottle oilers can provide a precise amount of lubricant directly to the areas that require it. In the context of pump operation, maintaining proper lubrication is essential to ensure smooth movement and to reduce wear on the piston rods. While continuous lubrication systems or external oil pumps can be suitable for some types of machinery, they may not be specifically designed for the localized lubrication needs of a duplex pump. Similarly, manual grease application can be inefficient and may not provide the consistent lubrication needed during pump operation. Using a bottle oiler allows for easy access and straightforward maintenance without the risk of over-lubricating, which is a common concern with other methods.