II. Preventive Maintenance
1. What is preventive maintenance?=
2. Give at least 5 defects on each category.
Metal Parts                    Rubber, Fiber, Plastic, Glass fiber
1.                       1.
2.                       2.
3.                       3.
4.                       4.
5.                       5.
Control sys. Components              Electricalcomponents and actuators
1.                       1. Â
2.                       2.
3.                       3.
4.                       4.
5.                       5.
Liquid system
1.
2.
3.
4.
5.
