Electrical Grid Situational-Based MCQs-Basic to Intermediate

If the frequency in the electrical grid drops significantly, what should be done?

• Increase reactive power

• Increase generation to match demand

• Disconnect all consumers

• Increase transformer tap

During peak hours, the load on the grid increases. What is the typical operator response?

• Disconnect a power plant

• Start peaker plants or load shedding

• Lower voltage

• Shut down grid

What does a grid-connected solar plant do when the grid fails?

• Keeps operating

• Switches to battery

• Trips off for safety (anti-islanding)

• Increases power

Why is 50 Hz commonly used in power systems?

• To match electronic devices

• Historical and engineering compromise between size and efficiency

• Because of lightning

• To avoid voltage drop

What is a consequence of high reactive power in the grid?

• Increased power factor

• Overvoltage

• Reduced efficiency and heating in lines

• Reduced current

What is the function of SCADA in electrical grid monitoring?

• Cooling transformers

• Real-time data acquisition and remote control

• Wireless charging

• Phase synchronization

The grid frequency in India is:

• 60 Hz

• 50 Hz

• 45 Hz

• 55 Hz

What is the role of substations in the grid?

• Lighting

• Voltage transformation and switching

• Energy storage

• Noise removal

A fault in one transmission line leads to increased load on adjacent lines. This is known as:

• Load shedding

• Islanding

• Cascading failure

• Frequency trip

What device protects the grid from overcurrents?

• Reactor

• Circuit breaker

• Voltage regulator

• Capacitor