Preventing the motherboard from touching the case are stand-offs.
Zif Sockets
Use standoffs to keep the motherboard above the metal base
Which action is recommended to prevent the motherboard from contacting the metal base of the case? Ensure that the non-conductive side of the case is beneath the motherboard. Use standoffs to keep the motherboard above the metal base. Place a non-conductive barrier between the motherboard and the metal base. Use a self-adhesive non-conductive membrane on the underside of the motherboard. Which action is recommended to prevent the motherboard from contacting the metal base of the case? Ensure that the non-conductive side of the case is beneath the motherboard. Use standoffs to keep the motherboard above the metal base. Place a non-conductive barrier between the motherboard and the metal base. Use a self-adhesive non-conductive membrane on the underside of the motherboard.
The metal grille on top a heater has a few purposes. One reason is safety, to prevent you from touching the heater directly. Another purpose is that the grille acts as a shield to prevent things from burning or melting around the heater.
why sometimes get a shock on a cold day touching a metal
Silicon
You can blow it with compressed air while it's in the motherboard. You can use a pencil eraser to clean the contacts if you take it out. Be careful, RAM is sensitive to static electricity. You can ground yourself by touching a part of the metal case of the computer before touching any component of the motherboard. You should never touch the contacts with your hands as the oil on them will contaminate it. You should ground yourself before putting the RAM back in.
Usually, when you buy a computer case it comes with standoffs which get screwed on to the case (there's usually at least 6 and as many as 10) and then the motherboard sits on those standoffs instead of on to the case itself. The motherboard standoffs serve the purpose of avoiding direct contact between the motherboard and the case itself so as to avoid a possible electrical discharge which would in turn damage the motherboard. There are holes on the case where the standoffs should be placed.
The motherboard in a computer connects all the components together. A computer case protects the motherboard it is the plastic or metal that surrounds the tower. The CPU is directly attached to the motherboard, a fan and heatsync tape keep heat from damaging the board. Motherboards are often damaged by static electricity or power surges using a surge protector or uninterruptible power supply will help prevent electrical damage.
A round plastic or metal peg that is used to separate the motherboard from the case, so that components on the back of the motherboard do not touch the case.
A metal doorknob
you would take out the spark plugs still attached to the spark wires. place the metal of the plugs onto a grounded metal spot. make sure they are not touching in order to prevent damaging them or blowing fuses.
splitters