Related Questions

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.
A 20
B 40
C 60
D 80
Which of the following medium is employed for extinction of arc in air circuit breaker ?
A Water
B Oil
C Air
D SF6
In the blast furnace, incorporation of water vapour in the blast gives the following effect.
A Increases the reducing potential of the gas
B Increases the flame temperature
C No significant change occurs
D Increases the hydrogen content in the metal
Circuit breaker is the team generally used in:
A Stock Exchange
B Commercial
C Insurance Company
D Leasing Company
In Railway applications ______ circuit breaker is used.
A SFe
B bulk oil
C minimum oil
D air break
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
A circuit breaker is a
A Switch
B Resistor
C Fuse
D Resettable protective device
Magnetic circuit breaker has ______ trip action.
A delayed
B instantaneous
C both of the above
D none of the above

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