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WorksheetsMCCB Quiz
Total questions: 10
Worksheet time: 50mins
Which item in below is not a part of MCCB ?
Operating Mechanism
Contacts
Vacuum Extinguisher
Trip Unit
To provide an insulated housing to mount all of the circuit breaker components called ?
MCCB Fire damper.
MCCB Molded case.
MCCB Trip unit
MCCB Contacts
The MCCB handle position indicates the ....?
Fire Extinguisher position.
Status of the contacts
Status of frame
Location of MCCB
How many position is there for MCCB handle?
Three
One
Two
No positions
To indicate the faulted circuit you must check ?
MCCB internal parts
MCCB handle position
MCCB location
MCCB terminals.
Which parts in below is the brain of MCCB?
The Arc Extinguisher unit.
The Molded case unit.
The MCCB terminals.
The MCCB trip unit.
Thermal magnetic unit working in principles of ……….?
Current and heat
Voltage and heat.
Voltage and frequency.
Voltage drop.
Breakers using the combination of magnetic elements and thermal elements are often called……………..?
Thermal magnetic breakers
Electronic breakers
Magnetic breakers.
Thermal breakers.
At ambient temperatures below 40°C, the breaker may carries …………than its continuous current rating.
Less current.
Same current.
More current
More voltage
choose how to restore the MCCB handle after tripping in case of short circuit occurred?
Repairing the fault area only.
Push the handle up to ON position.
Push the handlr to OFF then Push it up to ON position.
Change the MCCB with new unit
