Power Systems – Multiple Choice Questions (MCQs)

1. 73. What is the primary function of a control center in a power system?

   • A. To generate electricity
   • B. To monitor and control the entire power system
   • C. To repair faulty equipment
   • D. To forecast weather conditions

2. 74. Which type of load is typically considered a 'base load'?

   • A. Lighting
   • B. Industrial motors
   • C. Electric heating
   • D. Residential

3. 75. The concept of 'load shedding' is implemented to:

   • A. Increase power generation
   • B. Reduce system frequency
   • C. Maintain system stability during peak demand
   • D. Improve power factor

4. 76. What is the main advantage of using HVDC for long-distance power transmission?

   • A. Reduced losses
   • B. Lower cost of conversion equipment
   • C. Easier fault interruption
   • D. Ability to feed reactive power

5. 77. The main purpose of a capacitor bank in a power system is to:

   • A. Increase active power
   • B. Supply reactive power
   • C. Reduce voltage
   • D. Limit fault current

6. 78. Which of the following is an example of a smart grid technology?

   • A. Manual meter reading
   • B. Distributed generation
   • C. Analog relays
   • D. Fixed transformer taps

7. 79. The term 'fault MVA' refers to:

   • A. Maximum reactive power
   • B. Maximum apparent power during a fault
   • C. Minimum active power
   • D. Minimum reactive power

8. 80. The insulation level of a power system is determined by:

   • A. Operating voltage
   • B. Lightning impulse voltage
   • C. Switching impulse voltage
   • D. All of the above

9. 81. Which type of relay responds to the magnitude of the fault current?

   • A. Directional relay
   • B. Differential relay
   • C. Overcurrent relay
   • D. Distance relay

10. 82. What is the purpose of an isolator (disconnector) in a substation?

    • A. To interrupt fault currents
    • B. To isolate equipment for maintenance
    • C. To regulate voltage
    • D. To provide continuous power

11. 83. The use of series capacitors in transmission lines helps to:

    • A. Reduce voltage drop
    • B. Increase line impedance
    • C. Increase power losses
    • D. Reduce transient stability

12. 84. Which of the following is a renewable energy source that is intermittent?

    • A. Hydroelectric
    • B. Geothermal
    • C. Solar
    • D. Biomass