A circuit breaker is a

A Switch
B Resistor
C Fuse
D Resettable protective device

Correct Answer: Resettable protective device

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload.

 

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Related Questions

Circuit breaker in a stock exchange works as -
A a medium to spilt stocks
B An obstacle to excessive change in share price
C A policy for broker houses
D A constraint to issue bonus shares
Circuit breaker in a stock exchange works as ----
A A medium to split stocks
B An obstacle to excessive change in share price
C A policy for broker houses
D A constrain to issue bonus shares
The use of high speed circuit breaker -
A reduces the short circuit current
B increase the short circuit current
C improves system stability
D decrease system stability
Circuit breaker is the team generally used in:
A Stock Exchange
B Commercial
C Insurance Company
D Leasing Company
Magnetic circuit breaker has ______ trip action.
A delayed
B instantaneous
C both of the above
D none of the above
In a circuit breaker the basic problem is to
A maintain the arc
B extinguish the arc
C transmit large power
D emit the ionizing electrons
The arcing contacts in a circuit breaker are made of
A copper tungsten alloy
B porcelain
C electrolytic copper
D aluminium alloy
Air blast circuit breaker is used for
A over currents
B short duty
C intermittant duty
D repeated duty
Thermal circuit breaker has
A delayed trip action
B instantaneous trip action
C both of the above
D none of the above
In Railway applications ______ circuit breaker is used.
A SFe
B bulk oil
C minimum oil
D air break

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