Power System MCQs (Part-7)

What is renewable energy?

A Energy from non-replenishable sources
B Energy from natural, replenishable sources
C Energy stored in batteries
D Energy generated by fossil fuels

What is the main purpose of a smart grid?

A Reduce the number of power plants
B Enable efficient and reliable power delivery through automation and monitoring
C Increase dependency on manual operation
D Minimize renewable energy integration

What is a microgrid?

A A large-scale power generation system
B A localized grid that can operate independently
C A network of renewable energy systems only
D A system used exclusively for urban areas

What is the significance of power quality?

A Reducing transmission losses
B Ensuring consistent voltage, frequency, and waveform for reliable power delivery
C Increasing the load on the grid
D Reducing the number of transformers

What is voltage regulation?

A Adjusting current flow in a power system
B Maintaining stable voltage levels under varying load conditions
C Reducing power factor in the grid
D Enhancing system frequency

What is the purpose of frequency control in a power system?

A Synchronize power generation and load demand
B Balance power generation and load demand
C Increase voltage levels
D Improve power quality

What does SCADA stand for in power systems?

A Supervisory Control and Device Allocation
B Supervisory Control and Data Acquisition
C Smart Circuit and Device Automation
D Substation Control and Data Analysis

What is grid resilience?

A The grid’s ability to operate only during peak loads
B The grid’s ability to adapt and recover from disturbances
C The grid’s dependence on renewable energy
D The grid’s efficiency in reducing energy losses

What is economic load dispatch in power systems?

A Allocating loads equally across all transmission lines
B Distributing power to maximize costs
C Allocating generation to minimize costs while meeting demand
D Reducing power quality to save resources

What is demand-side management?

A Optimizing power consumption on the consumer side
B Increasing system frequency
C Generating power on the consumer side
D Reducing renewable energy integration

What is the purpose of energy storage systems in a power grid?

A Improve the grid’s voltage regulation
B Store excess energy for use during peak demand or emergencies
C Reduce transmission line efficiency
D Replace renewable energy sources

What is islanding in power systems?

A Synchronizing power systems for resource sharing
B A part of the grid operating independently during a fault or disturbance
C Disabling renewable energy sources during faults
D Connecting all regions of a power grid

What is the role of a protective relay in a power system?

A Generate electricity from renewable sources
B Detect and isolate faults in the system
C Increase voltage levels
D Reduce line losses

What is a black start in power systems?

A Starting a system after a complete blackout without external power
B Shutting down the grid during peak demand
C Switching off renewable energy sources
D Reducing system frequency

What is the primary purpose of reactive power in a power system?

A To perform useful work in devices
B To maintain voltage levels in the grid
C To reduce power losses
D To increase grid frequency

What is the main advantage of integrating renewable energy into power systems?

A Increasing dependence on fossil fuels
B Reducing greenhouse gas emissions and promoting sustainability
C Decreasing grid stability
D Increasing transmission losses

What is voltage sag?

A A temporary decrease in voltage
B A sudden increase in voltage
C A complete power outage
D A fluctuation in frequency

What is the purpose of load flow analysis?

A Design of renewable energy systems
B Calculation of voltage, current, and power flow in the grid under steady-state conditions
C Detection of faults in the system
D Monitoring power outages

What is the main goal of grid interconnection?

A Improve system reliability and resource sharing between grids
B Increase dependency on a single power plant
C Reduce the number of substations
D Decrease grid stability

What does power factor represent in a power system?

A The ratio of real power to apparent power
B The ratio of voltage to current
C The efficiency of transformers
D The frequency of the system