What is the primary function of a generating station?
B
To distribute electricity
C
To generate electrical power from various energy sources
Analysis & Theory
A generating station converts mechanical, chemical, or nuclear energy into electrical energy for supply to consumers.
Which of the following is the correct sequence of energy conversion in a thermal power plant?
A
Electrical → Chemical → Thermal
B
Chemical → Thermal → Mechanical → Electrical
C
Mechanical → Electrical → Thermal
D
Thermal → Chemical → Electrical
Analysis & Theory
In a thermal power plant, fuel is burned to produce heat (thermal), which converts water to steam (mechanical), and the turbine drives the generator to produce electricity.
What is the role of a turbine in a generating station?
B
To store mechanical energy
C
To convert thermal energy into mechanical energy
Analysis & Theory
The turbine converts thermal energy from steam, water, or gas into mechanical energy to rotate the generator.
Which component in a generating station converts mechanical energy into electrical energy?
Analysis & Theory
The alternator or generator converts the mechanical energy of the rotating turbine into electrical energy using electromagnetic induction.
In a hydroelectric power plant, what drives the turbine?
C
Flowing water under pressure
Analysis & Theory
Hydroelectric plants use falling or flowing water to drive turbines, converting potential energy into mechanical energy.
Which type of generating station has the fastest response to load demand changes?
B
Hydroelectric power plant
Analysis & Theory
Hydroelectric power plants can quickly adjust output to match load demand due to rapid control of water flow.
What is the function of the boiler in a thermal power plant?
A
To generate electricity directly
C
To convert water into steam using heat energy
Analysis & Theory
The boiler heats water using fuel (coal, oil, gas) to produce high-pressure steam for the turbine.
In nuclear power stations, what is the source of heat energy?
C
Nuclear fission of uranium or plutonium
Analysis & Theory
Nuclear power stations use the fission of radioactive materials like uranium to produce heat energy.
Why is a condenser used in a steam power plant?
B
To maintain turbine speed
C
To condense exhaust steam back into water
Analysis & Theory
The condenser cools the exhaust steam from the turbine and turns it back into water for reuse in the boiler.
Which of the following is NOT a component of a typical generating station?
Analysis & Theory
Inverters are used in solar or backup systems, not in conventional generating stations like thermal or hydroelectric plants.