1. The main function of a power plant is to:
(A) Generate electrical energy
(B) Store electricity
(C) Convert electricity to mechanical energy
(D) Transmit electricity
2. Thermal power plants mainly use:
(A) Wind
(B) Water
(C) Coal, oil, or gas
(D) Solar energy
3. In a hydroelectric power plant, the energy conversion is:
(A) Potential energy → Kinetic energy → Electrical energy
(B) Chemical energy → Electrical energy
(C) Thermal energy → Mechanical energy
(D) Solar energy → Electrical energy
4. The efficiency of a thermal power plant is generally:
(A) 90–95%
(B) 70–80%
(C) 10–20%
(D) 35–45%
5. The main equipment in a thermal power plant is:
(A) Boiler, turbine, generator
(B) Dam, penstock, turbine
(C) Solar panels
(D) Wind turbine
6. The efficiency of a hydroelectric power plant is:
(A) 50%
(B) 35–45%
(C) 80–90%
(D) 25–30%
7. A nuclear power plant uses:
(A) Nuclear fission of uranium or plutonium
(B) Combustion of coal
(C) Solar energy
(D) Wind energy
8. The main disadvantage of nuclear power is:
(A) Radioactive waste
(B) Low efficiency
(C) Fuel cost is high
(D) Takes long to start
9. The boiler in a thermal power plant produces:
(A) Steam
(B) Electricity directly
(C) Fuel gas
(D) Compressed air
10. The main role of the turbine is to:
(A) Convert electrical energy into mechanical energy
(B) Convert steam energy into mechanical energy
(C) Convert fuel into heat
(D) Store energy
11. The generator converts:
(A) Mechanical energy → Electrical energy
(B) Electrical energy → Mechanical energy
(C) Heat → Chemical energy
(D) Solar energy → Mechanical energy
12. Combined cycle power plants use:
(A) Solar and wind
(B) Only steam turbines
(C) Only hydro turbines
(D) Gas and steam turbines together
13. Cogeneration refers to:
(A) Simultaneous production of electricity and useful heat
(B) Using two fuels at once
(C) Parallel transmission
(D) Two turbines driving one generator
14. The major loss in thermal power plants is:
(A) Heat loss in exhaust
(B) Transmission loss
(C) Friction loss
(D) Mechanical loss in turbine
15. Energy conservation can be achieved by:
(A) Increasing power generation
(B) Using efficient motors and lighting
(C) Installing more transformers
(D) Reducing transmission lines
16. A major advantage of hydroelectric power is:
(A) Renewable energy source
(B) Fuel cost
(C) High pollution
(D) Complex operation
17. Peak load in power plants refers to:
(A) Minimum demand
(B) Average load
(C) Maximum demand of electricity
(D) Reserve capacity
18. Base load power plants are designed to:
(A) Supply continuous power at constant load
(B) Operate during peak demand only
(C) Start and stop frequently
(D) Supply emergency power
19. The main fuel for a nuclear plant is:
(A) Uranium
(B) Coal
(C) Diesel
(D) Gas
20. Energy conservation reduces:
(A) Power generation efficiency
(B) Operational cost and environmental impact
(C) Transmission efficiency
(D) Voltage drop
21. In solar power plants, energy is generated by:
(A) Photovoltaic effect
(B) Steam turbines
(C) Diesel engines
(D) Nuclear fission
22. Wind energy is converted into electricity using:
(A) Transformers
(B) Solar panels
(C) Boilers
(D) Wind turbines
23. The efficiency of a gas turbine power plant is generally:
(A) 30–40%
(B) 70%
(C) 90%
(D) 10–20%
24. Pumped-storage hydroelectric plants are used for:
(A) Base load supply
(B) Peak load management
(C) Nuclear power
(D) Solar power backup
25. Superconducting materials in energy systems help in:
(A) Reducing transmission losses
(B) Increasing fuel consumption
(C) Cooling water
(D) Combustion
26. The term “grid” refers to:
(A) Isolated power supply
(B) Single generator
(C) Transformer only
(D) Network of interconnected power lines and stations
27. The main source of fossil fuels is:
(A) Coal, oil, and natural gas
(B) Water
(C) Sun
(D) Wind
28. Energy conservation in industries is achieved by:
(A) Using more boilers
(B) Reducing staff
(C) Using variable speed drives and efficient lighting
(D) Ignoring power factor
29. Power factor improvement reduces:
(A) Frequency
(B) Active power
(C) Voltage
(D) Reactive power and losses
30. The main environmental concern of thermal power plants is:
(A) Air pollution
(B) Noise only
(C) Vibration
(D) Electrical faults
31. The role of a transformer in power plants is to:
(A) Store energy
(B) Generate electricity
(C) Step up voltage for transmission
(D) Cool turbines
32. In energy conservation, replacing incandescent bulbs with LED reduces:
(A) Electricity consumption
(B) Voltage
(C) Frequency
(D) Generator speed
33. The function of a condenser in a thermal power plant is:
(A) Generate electricity
(B) Heat water
(C) Condense exhaust steam to water
(D) Step up voltage
34. The heat rate of a power plant indicates:
(A) Fuel consumption per unit of electrical energy
(B) Efficiency of generators only
(C) Mechanical losses
(D) Transmission losses
35. In co-generation, the efficiency of energy utilization can reach:
(A) 10%
(B) 30%
(C) 50%
(D) 70–80%
36. Renewable energy sources include:
(A) Hydro, solar, wind, and biomass
(B) Coal and oil
(C) Diesel
(D) Natural gas only
37. Load factor is defined as:
(A) Voltage / Current
(B) Maximum load / Average load
(C) Active power / Reactive power
(D) Average load / Maximum load
38. The main advantage of nuclear power is:
(A) High energy density fuel
(B) Cheap fuel
(C) No radiation
(D) Low cost plant
39. Thermal power plants are generally located:
(A) Near wind
(B) Near load centers only
(C) Anywhere
(D) Near fuel supply and water source
40. In energy conservation, proper insulation reduces:
(A) Mechanical losses
(B) Heat losses
(C) Electrical losses
(D) Vibration
41. Peak shaving in power plants means:
(A) Reducing peak load by using storage or auxiliary plants
(B) Increasing base load
(C) Reducing voltage
(D) Switching off generators
42. The energy savings in industries are measured in:
(A) Amperes
(B) Volts
(C) kWh
(D) Ohms
43. The efficiency of an energy-efficient motor is usually:
(A) 90–95%
(B) 60%
(C) 70%
(D) 80%
44. Smart grids help in:
(A) Controlling turbines only
(B) Reducing voltage only
(C) Reducing frequency only
(D) Efficient energy distribution
45. Combined heat and power (CHP) systems increase overall efficiency by:
(A) Utilizing both electricity and waste heat
(B) Using only electricity
(C) Using only heat
(D) Reducing fuel consumption by half
46. The main factor in site selection for hydroelectric plants is:
(A) Solar radiation
(B) Load center
(C) Fuel availability
(D) Water availability and head
47. Fossil fuel power plants contribute to:
(A) Global warming and air pollution
(B) Water pollution only
(C) Noise only
(D) None
48. Energy conservation in buildings can be achieved by:
(A) Using incandescent bulbs
(B) Increasing number of motors
(C) Proper insulation and efficient lighting
(D) Ignoring power factor
49. The peak load demand occurs:
(A) During maximum consumer usage period
(B) At night
(C) During maintenance
(D) Randomly
50. The main objective of energy management is to:
(A) Reduce voltage
(B) Increase consumption
(C) Optimize energy usage and reduce cost
(D) Increase frequency