MOdule 3

What is the full form of MCB?

• Miniature contact breaker
  

• Mini circuit breaker

• Miniature circuit breaker

• Mini contact breaker

Which type of material is commonly used in the contact of mechanical relay

• copper

• aluminium

• silver

• Platinum

Which of the following fuses can be reset automatically after cooling down

• Glass fuse

• Poly Fuse

• MCB

• Ceramic Fuse

Main Function of relay in an electric circuit is

• To Open and Close circuit

• To amplify Voltage

• To store charge

• To convert AC to DC

Which of the following not characteristics of solid state relay

• No moving parts

• Long life span

• High switching speed

• Noise Immunity

MCB's are primarily used for protecting which type of electrical system?

• Low power electronic devices

• Residential and commercial wiring

• Small appliances only

• Automobiles

What triggers an MCB to trip?

• When the voltage is too low

• When the current is exceeds its rating

• When a mechanical fault occurs

• When the resistance is too high

How does a poly fuse differ from regular fuse?

• It does not reset

• It is cheeper

• It can reset multiple times

• It offer no overload protection

Which Material commonly used for making fuse elements?

• Copper

• Aluminium

• Tin-Lead alloy

• Silver

Which of the following is characteristics of fuse

• Reusable

• single use

• Self resetting

• High cost