Q. In which application would you typically find a distribution transformer?
-
A.
At power generation stations
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B.
In substations
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C.
In industrial plants
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D.
In residential areas
Solution
Distribution transformers are commonly found in residential areas to step down voltage for consumer use.
Correct Answer:
D
— In residential areas
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Q. What is the function of a transformer in a renewable energy system?
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A.
To store energy
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B.
To convert AC to DC
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C.
To match voltage levels for grid connection
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D.
To regulate frequency
Solution
Transformers in renewable energy systems are used to match the voltage levels of generated power to those of the grid for effective integration.
Correct Answer:
C
— To match voltage levels for grid connection
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Q. What is the main purpose of an isolation transformer?
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A.
To increase voltage
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B.
To decrease voltage
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C.
To provide electrical isolation
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D.
To improve power factor
Solution
Isolation transformers are used to provide electrical isolation between circuits, enhancing safety and reducing noise.
Correct Answer:
C
— To provide electrical isolation
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Q. What is the primary application of a step-up transformer in power systems?
-
A.
To increase voltage for transmission
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B.
To decrease voltage for distribution
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C.
To isolate circuits
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D.
To convert AC to DC
Solution
Step-up transformers are used to increase voltage levels for efficient long-distance transmission of electrical power.
Correct Answer:
A
— To increase voltage for transmission
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Q. What is the role of a transformer in a power factor correction system?
-
A.
To increase load current
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B.
To decrease load current
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C.
To adjust voltage levels
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D.
To provide reactive power
Solution
Transformers can be part of power factor correction systems by providing reactive power to improve the overall power factor of the system.
Correct Answer:
D
— To provide reactive power
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Q. What type of transformer is used to connect two different voltage levels in a substation?
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A.
Step-up transformer
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B.
Step-down transformer
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C.
Isolation transformer
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D.
Three-phase transformer
Solution
Three-phase transformers are commonly used in substations to connect and transform between different voltage levels in three-phase systems.
Correct Answer:
D
— Three-phase transformer
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Q. What type of transformer is used to connect two systems operating at different frequencies?
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A.
Step-up transformer
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B.
Step-down transformer
-
C.
Frequency converter transformer
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D.
Isolation transformer
Solution
Frequency converter transformers are specifically designed to connect systems that operate at different frequencies.
Correct Answer:
C
— Frequency converter transformer
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Q. Which application requires a transformer to handle high-frequency signals?
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A.
Power transmission
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B.
Audio equipment
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C.
Lighting systems
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D.
Heating systems
Solution
Transformers used in audio equipment are designed to handle high-frequency signals for effective sound transmission.
Correct Answer:
B
— Audio equipment
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Q. Which application requires a transformer with a high turns ratio?
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A.
Power generation
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B.
Long-distance transmission
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C.
Local distribution
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D.
Residential use
Solution
High turns ratio transformers are essential for long-distance transmission to step up voltage and minimize losses.
Correct Answer:
B
— Long-distance transmission
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Q. Which transformer type is used for voltage regulation in industrial applications?
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A.
Step-up transformer
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B.
Step-down transformer
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C.
Variable transformer
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D.
Phase-shifting transformer
Solution
Variable transformers are used in industrial applications for voltage regulation to adapt to varying load conditions.
Correct Answer:
C
— Variable transformer
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Q. Which type of transformer is commonly used in power distribution systems?
-
A.
Step-up transformer
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B.
Step-down transformer
-
C.
Isolation transformer
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D.
Auto transformer
Solution
Step-down transformers are used in distribution systems to reduce high transmission voltages to lower levels suitable for consumer use.
Correct Answer:
B
— Step-down transformer
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