Question

Which of the following materials is widely used for small, moulded parts such as lamp holder, terminal blocks and small panels?
1. Asbestos
2. Bakelite
3. Cotton and silk
4. Polyvinyl chloride

Answer 1

Correct Answer - Option 2 : Bakelite

Bakelite is widely used for small, moulded parts such as lamp holder, terminal blocks and small panels.

Explanation:

• Bakelite is an early plastic.
• It is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde.
• Bakelite monomer is phenol and formaldehyde.
• Due to its excellent insulating properties, it is used for making switches.
• High resistance to electricity and heat.
• PCB or Printed Circuit Board is complex electronic and electrical circuit assembly connecting wires printed on an insulating sturdy material sheet called bakelite sheet and components surface mounted.
• ​The standard thickness of bakelite sheet is 1.57 mm.