QUESTION THRE a) Define the term electrical maintenance. b) State any FOUR reasons for maintenance in an electrical equipment or machinery. (2Marks) c) Briefly explain the following types of maintenance: (4Marks) i) Preventive maintenance ii) Corrective maintenance iii) Predictive maintenance d) State any FIVE activities that may be carried out in an equipment during routine maintenance. (5Marks) (9Marks) OTechmical University of Mombasa

a) Electrical maintenance refers to the regular and systematic inspection, repair, and replacement of electrical equipment and machinery to ensure their proper functioning and to prevent any potential failures or malfunctions.<br /><br />b) Four reasons for maintenance in electrical equipment or machinery are:<br />1. To ensure safety and prevent accidents.<br />2. To prolong the lifespan of the equipment.<br />3. To maintain optimal performance and efficiency.<br />4. To minimize downtime and reduce costs associated with equipment failures.<br /><br />c) Brief explanations of the types of maintenance are as follows:<br /><br />i) Preventive maintenance: This type of maintenance involves performing routine checks and servicing of equipment to prevent any potential failures or breakdowns. It is carried out at regular intervals, such as daily, weekly, or monthly, to ensure the equipment continues to function properly.<br /><br />ii) Corrective maintenance: This type of maintenance is carried out when equipment fails or malfunctions. It involves diagnosing the problem, repairing or replacing the faulty components, and restoring the equipment to its normal operating condition.<br /><br />iii) Predictive maintenance: This type of maintenance uses advanced diagnostic tools and techniques, such as sensors and data analysis, to predict when equipment is likely to fail. By identifying potential issues before they occur, preventive measures can be taken to avoid costly repairs or downtime.<br /><br />d) Five activities that may be carried out in equipment during routine maintenance are:<br />1. Cleaning: Removing dirt, dust, and debris from the equipment to ensure smooth operation.<br />2. Lubrication: Applying lubricants to moving parts to reduce friction and wear.<br />3. Inspection: Checking for any visible signs of damage or wear and tear.<br />4. Tightening: Ensuring all bolts and screws are securely tightened to prevent loose connections.<br />5. Replacement: Replacing worn-out or damaged components to restore the equipment's functionality.