Electrical Switch Gear Quiz

What is the purpose of switch gear in electrical equipment?

• To generate electricity

• To store electrical energy

• To control, protect, and isolate electrical equipment

• To cool down electrical components

Which type of gas is commonly used in Gas Insulated Switch Gear (GIS)?

• Sulfur hexafluoride (SF6)

• Oxygen

• Nitrogen

• Carbon dioxide

What is the function of a Residual Current Circuit Breaker (RCCB)?

• To store electrical energy

• To regulate voltage

• To increase current flow

• To provide protection against earth faults

What is the main difference between a Molded Case Circuit Breaker (MCCB) and an Air Circuit Breaker (ACB)?

• ACB has a higher short circuit current rating than MCCB

• ACB is stronger and more durable than MCCB

• MCCB is used for low voltage while ACB is used for high voltage

• MCCB has shunt trip coil for earth fault trip while ACB does not

What should be included on the nameplate of low voltage switch gear?

• Manufacturer's name, gear type, serial number

• Voltage rating, current flow, power factor

• Operating temperature, color coding, installation date

• Material composition, weight, dimensions

What is the purpose of the isolated position in the ACB?

• For emergency shutdown

• For normal operation

• For maintenance work

• For testing purposes

What should be done before inserting the ACB into the main switchboard?

• Perform a stamping test

• Clean the ACB

• Turn on the ACB

• Perform insulation testing

What is the recommended voltage variation limit for the ACB?

• +10 and -5 volts

• +5 and -10 volts

• +15 and -5 volts

• +5 and -15 volts

What should be done after completing maintenance work on the ACB?

• Increase the voltage variation limit

• Turn off all fuses

• Reset the EFR

• Reset the OCR

What is the purpose of the 'Post Fault' maintenance operation?

• To reset the EFR

• To inspect the ACB after a circuit fault

• To perform stamping tests

• To clean the ACB