What is the effect of the questions?
1. Uses liquid spray and soft cloth to clean a keyboard.
2. Uses a glass cleaner and soft cloth to clean a monitor.
3. Splicing tools are well maintained and grasps objects properly.
4. Regularly checks the condition of power tools.
5. Uses a screwdriver with a magnetized tip.
6. Excessive dust in the system unit.
7. Failure to unplug the device from the power source.