5. (a) Explain the following types of construction plant maintenance: (i) corrective maintenance; (ii) scheduled maintenance; (iii) preventive maintenance; (iv) predictive maintenance. (12 marks)Oct./Nov. 2021

(i) Corrective maintenance: Corrective maintenance is the type of maintenance that is performed on construction plant equipment after it has broken down or failed. The goal of corrective maintenance is to repair or replace the faulty part and restore the equipment to its normal working condition. This type of maintenance is typically performed on an as-needed basis and is reactive in nature, meaning it is only performed when a problem occurs.

(ii) Scheduled maintenance: Scheduled maintenance is the type of maintenance that is performed on construction plant equipment at regular intervals, regardless of whether the equipment is malfunctioning. The goal of scheduled maintenance is to prevent breakdowns and prolong the lifespan of the equipment. This type of maintenance is typically performed on a regular basis, such as weekly, monthly, or annually, and is proactive in nature, meaning it is performed to prevent problems from occurring.

(iii) Preventive maintenance: Preventive maintenance is the type of maintenance that is performed on construction plant equipment to prevent the occurrence of failure or to detect a failure in its early stages. The goal of preventive maintenance is to prevent breakdowns and prolong the lifespan of the equipment. This type of maintenance is typically performed on a regular basis, such as weekly, monthly, or annually, and is proactive in nature, meaning it is performed to prevent problems from occurring.

(iv) Predictive maintenance: Predictive maintenance is the type of maintenance that is performed on construction plant equipment by utilizing condition monitoring techniques and data analysis to predict when maintenance or replacement of components is needed. The goal of predictive maintenance is to predict equipment failures and perform maintenance or repairs before the equipment breaks down. This type of maintenance is typically performed on an as-needed basis and is proactive in nature, meaning it is performed to prevent problems from occurring.