Question

Which of the following is a disadvantage of a Miniature Circuit Breaker?

• A.
  It automatically breaks the circuit if there is overheating.
• B.
  It needs to be replaced after every single operation.
• C.
  It can be manually or automatically reset.
• D.
  It protects the appliances from large amounts of current.

Answer 1

The correct option is B

It needs to be replaced after every single operation.
A Miniature Circuit Breaker (MCB) contains switches that automatically turn off whenever current exceeds safe limit. This protects all the home appliances from getting burnt due to high currents.
It can be reset automatically or manually to restore normal operation. It is a device that just needs one-time installation and works for a long period of time.