Substation Design MCQs (Part-10)

What is the primary purpose of a transmission substation?

A To distribute power to homes
B To step up voltage for long-distance transmission
C To store electrical energy
D To regulate frequency

What is the function of a distribution substation?

A To step up voltage levels
B To step down voltage for local distribution
C To provide reactive power
D To isolate faulty sections

What is the main feature of a compact substation?

A It operates at very high voltage levels
B It is fully enclosed and suitable for limited spaces
C It only integrates renewable energy sources
D It requires no maintenance

What is a load dispatch center responsible for?

A Regulating voltage levels in substations
B Monitoring and controlling power generation and distribution
C Detecting insulation failures
D Testing substation equipment

Which device in a substation is used to isolate a faulty section?

A Circuit breaker
B Isolator
C Relay
D Transformer

What is the purpose of fault isolation in substations?

A To increase power factor
B To separate faulted sections from the healthy system
C To step up voltage levels
D To improve communication systems

What is the purpose of an emergency shutdown system in a substation?

A To step down voltage levels during faults
B To safely disconnect the substation during critical emergencies
C To increase reactive power flow
D To reduce energy losses

What is the function of a relay in substation protection systems?

A To monitor reactive power
B To detect faults and signal circuit breakers
C To store electrical energy
D To regulate voltage levels

What is the primary purpose of substation testing?

A To increase the power factor
B To ensure the reliability and safety of equipment
C To step down voltage levels
D To detect insulation resistance

Which substation component is critical for voltage stability?

A Capacitor bank
B Relay
C Lightning arrester
D Isolator

What is the purpose of a sectionalized busbar system?

A To divide the substation into separate voltage levels
B To enhance reliability by allowing sections to operate independently
C To reduce insulation requirements
D To eliminate the need for circuit breakers

What is the typical voltage range for a transmission substation?

A Below 33 kV
B 110 kV to 765 kV
C 11 kV to 33 kV
D Above 1000 kV

Which component protects substations from lightning surges?

A Lightning arrester
B Circuit breaker
C Capacitor bank
D Isolator

What is the role of tap changers in transformers?

A To regulate voltage levels
B To store electrical energy
C To step up current flow
D To detect faults

What does “substation reliability” ensure?

A That all faults are ignored
B That the system operates continuously with minimal outages
C That all equipment is replaced regularly
D That voltage levels are always stepped up

What is the primary purpose of a high-voltage circuit breaker?

A To step up voltage levels
B To interrupt large fault currents
C To measure current flow
D To store electrical energy

What is the typical voltage range for a transmission substation?

A Below 33 kV
B 110 kV to 765 kV
C 11 kV to 33 kV
D Above 1000 kV

Which component protects substations from lightning surges?

A Lightning arrester
B Circuit breaker
C Capacitor bank
D Isolator

What is the role of tap changers in transformers?

A To regulate voltage levels
B To store electrical energy
C To step up current flow
D To detect faults

What does “substation reliability” ensure?

A That all faults are ignored
B That the system operates continuously with minimal outages
C That all equipment is replaced regularly
D That voltage levels are always stepped up