【Daily Question】Registered Safety Engineer 2021.10.26

Thread Content

Mechanical product design should take maintainability into account to ensure that once a failure occurs, it is easy to detect and repair. Among the following design requirements for mechanical products, which one does not relate to maintainability considerations? A. Sufficient space for maintenance activities; B. Standardization and interchangeability of components; C. The faulty parts being located outside hazardous areas; D. Diversified design of key components. Answer: D. Explanation: D relates to the reliability design of machinery. The maintainability design of mechanical equipment is a part of mechanical reliability design. The maintainability design should take the following requirements into account: ① Place the settings for maintenance, lubrication, and repair outside the hazardous area ； ②The accessibility for maintenance personnel to approach the faulty area in order to carry out inspections, repairs, part replacements, and other maintenance tasks; ③ the standardization and interchangeability of components and sub-assemblies; ④ meanwhile, the safety of the maintenance personnel must also be taken into consideration.