Q. In a hydroelectric power plant, what is the role of the dam?
A.
To store water
B.
To generate steam
C.
To cool the generator
D.
To convert AC to DC
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Solution
The dam in a hydroelectric power plant stores water, creating a reservoir that can be released to generate electricity.
Correct Answer:
A
— To store water
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Q. In power distribution, what does the term 'feeder' refer to?
A.
A type of transformer
B.
A line that carries electricity from substations to consumers
C.
A protective device
D.
A method of load flow analysis
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Solution
In power distribution, a 'feeder' refers to a line that carries electricity from substations to consumers, distributing power to various loads.
Correct Answer:
B
— A line that carries electricity from substations to consumers
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Q. In power distribution, what is the purpose of a distribution transformer?
A.
To generate electricity
B.
To step down voltage for consumer use
C.
To store energy
D.
To convert AC to DC
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Solution
Distribution transformers step down high voltage electricity from the distribution network to a lower voltage suitable for consumer use.
Correct Answer:
B
— To step down voltage for consumer use
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Q. What is the function of a circuit breaker in a power system?
A.
To increase voltage
B.
To protect against overloads
C.
To convert energy types
D.
To regulate frequency
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Solution
Circuit breakers are designed to protect electrical circuits from overloads and short circuits by interrupting the flow of current.
Correct Answer:
B
— To protect against overloads
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Q. What is the function of circuit breakers in power systems?
A.
To increase voltage
B.
To protect electrical circuits from overload
C.
To convert AC to DC
D.
To store energy
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Solution
Circuit breakers are designed to protect electrical circuits from overload and short circuits by interrupting the flow of electricity.
Correct Answer:
B
— To protect electrical circuits from overload
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Q. What is the main disadvantage of using coal as a power generation method?
A.
High initial cost
B.
Limited availability
C.
High greenhouse gas emissions
D.
Low energy output
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Solution
Coal-fired power generation is associated with high greenhouse gas emissions, contributing to climate change.
Correct Answer:
C
— High greenhouse gas emissions
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Q. What is the main purpose of a transformer in a power system?
A.
To generate electricity
B.
To convert AC to DC
C.
To step up or step down voltage
D.
To store energy
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Solution
Transformers are used to step up or step down voltage levels in power systems for efficient transmission and distribution.
Correct Answer:
C
— To step up or step down voltage
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Q. What is the main purpose of a transformer in power systems?
A.
To generate electricity
B.
To convert AC to DC
C.
To step up or step down voltage
D.
To store energy
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Solution
Transformers are used in power systems to step up or step down voltage levels for efficient transmission and distribution of electricity.
Correct Answer:
C
— To step up or step down voltage
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Q. What is the primary advantage of using gas turbines for power generation?
A.
High efficiency at low loads
B.
Low emissions
C.
Ability to start quickly
D.
All of the above
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Solution
Gas turbines offer several advantages including high efficiency at low loads, low emissions, and the ability to start quickly, making them suitable for peaking power.
Correct Answer:
D
— All of the above
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Q. Which of the following is a renewable energy source used for power generation?
A.
Natural gas
B.
Coal
C.
Wind
D.
Nuclear
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Solution
Wind energy is a renewable source that is harnessed using wind turbines to generate electricity.
Correct Answer:
C
— Wind
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Q. Which of the following is NOT a method of load flow analysis?
A.
Gauss-Seidel method
B.
Newton-Raphson method
C.
Power factor correction
D.
Fast Decoupled method
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Solution
Power factor correction is not a method of load flow analysis; it is a technique used to improve the power factor in electrical systems.
Correct Answer:
C
— Power factor correction
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Q. Which of the following methods is commonly used for load flow analysis?
A.
Newton-Raphson method
B.
Fourier transform
C.
Laplace transform
D.
Monte Carlo simulation
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Solution
The Newton-Raphson method is a widely used technique for performing load flow analysis in power systems.
Correct Answer:
A
— Newton-Raphson method
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Q. Which type of power generation uses the kinetic energy of moving water?
A.
Geothermal
B.
Wind
C.
Hydroelectric
D.
Solar
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Solution
Hydroelectric power generation utilizes the kinetic energy of moving water to turn turbines and generate electricity.
Correct Answer:
C
— Hydroelectric
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