4. Is it necessary for measures used by pump mechanic to be assized? If so how often? ?

Yes, it is necessary for measures used by pump mechanics to be assized in order to ensure accuracy and reliability in their work. The frequency of assizing measures may vary depending on the specific requirements of the job and the industry standards, but it is generally recommended to have them assized at least once a year. This helps to maintain the quality and precision of the tools and equipment used by pump mechanics, ultimately leading to better performance and results in their work.