Power System Components: Transmission, Transformation, and Protection

Question 1

Which of the following are primary functions of transformers in power systems?

Accepted Answer

Voltage conversion

Accepted Answer

Isolation

Answer

Current conversion

Answer

Power factor correction

Question 2

Which of the following is NOT a type of transmission line used in electrical power systems?

Accepted Answer

Optical fiber cable

Answer

Overhead conductor

Answer

Underground cable

Answer

Submarine cable

Question 3

Which type of transformer is specifically designed to increase voltage levels in a power system?

Accepted Answer

Power transformer

Answer

Distribution transformer

Answer

Instrument transformer

Question 4

For long-distance transmission of electrical power, which type of transmission line is predominantly employed?

Accepted Answer

Overhead lines

Answer

Underground cables

Answer

Submarine cables

Question 5

What is the primary role of a distribution transformer in a power system?

Accepted Answer

Decreasing voltage for distribution

Answer

Increasing voltage for transmission

Answer

Regulating power flow

Answer

Protecting equipment

Question 6

What is the fundamental function of a transformer in a power system?

Accepted Answer

To alter voltage levels

Answer

To isolate circuits

Answer

To shield against overloads

Answer

To manage power distribution

Question 7

Which type of transmission line construction is most effective in minimizing energy loss during power transmission?

Accepted Answer

High-voltage DC lines

Answer

Overhead lines

Answer

Underground cables

Answer

Submarine cables

Question 8

What is the primary role of a relay in power system protection?

Accepted Answer

To detect the presence of electrical faults

Answer

To isolate faulty sections of the system

Answer

To restore power after a fault occurs

Answer

To limit fault current

Question 9

What is the main purpose of a surge arrester in an electrical power system?

Accepted Answer

To safeguard against lightning strikes and voltage surges

Answer

To limit overcurrent

Answer

To isolate faulty equipment

Answer

To regulate voltage levels

Question 10

Rewritten: Which of the following is the primary function of a transmission line?

Accepted Answer

To transmit electrical power over long distances

Answer

To increase voltage

Answer

To decrease voltage

Answer

To protect against overcurrents

Question 11

Rewritten: What is the main purpose of a transformer?

Accepted Answer

To change the voltage level of electrical power

Answer

To protect the power system from overloads

Answer

To isolate sections of the power system

Answer

To regulate the flow of power

Question 12

Rewritten: Which type of substation connects transmission lines to distribution lines?

Accepted Answer

Distribution substation

Answer

Generating substation

Answer

Bulk power substation

Answer

Switching substation

Question 13

Rewritten: What is the primary function of a circuit breaker?

Accepted Answer

To detect and interrupt excessive current flow

Answer

To increase voltage

Answer

To regulate power flow

Answer

To isolate sections of the power system

Question 14

Rewritten: Which of the following is NOT a component of a power system?

Accepted Answer

Solar panels

Answer

Generators

Answer

Transmission lines

Answer

Substations

Question 15

Rewritten: What is the primary function of a surge arrester?

Accepted Answer

To protect equipment from voltage spikes

Answer

To isolate faults on the power system

Answer

To regulate power flow

Answer

To decrease voltage

Question 16

Rewritten: Which of the following is a characteristic of a radial power distribution system?

Accepted Answer

Power flows from a single source to multiple loads

Answer

Power flows from multiple sources to a single load

Answer

Power can flow in both directions

Answer

Power is distributed at extremely high voltage

Question 17

Rewritten: What is the role of a power factor capacitor in a power system?

Accepted Answer

To improve power factor

Answer

To decrease voltage

Answer

To isolate faults

Answer

To protect equipment from surges

Question 18

Rewritten: What is the purpose of a ground fault neutralizer?

Accepted Answer

To provide a path for ground faults to flow

Answer

To isolate sections of the power system

Answer

To protect equipment from overloads

Answer

To regulate voltage

Question 19

Which of the following is NOT a key component of a traditional power system?

Accepted Answer

Solar panel

Answer

Transmission line

Answer

Transformer

Answer

Substation

Question 20

What is the primary purpose of a transformer in an electrical power system?

Accepted Answer

To change voltage levels while maintaining power

Answer

To regulate current flow

Answer

To isolate faulty equipment

Answer

To store electrical energy

Question 21

Which type of circuit breaker is most commonly used in high-voltage power systems and provides excellent insulation properties?

Accepted Answer

Sulfur hexafluoride (SF6) circuit breaker

Answer

Oil circuit breaker

Answer

Vacuum circuit breaker

Answer

Air circuit breaker

Question 22

What is the main function of a busbar in an electrical substation?

Accepted Answer

To serve as a common connection point for multiple circuits, facilitating power distribution

Answer

To protect against lightning strikes

Answer

To step up voltage levels

Question 23

What is the primary purpose of a surge arrester in a power system?

Accepted Answer

To protect electrical equipment from damage caused by voltage spikes

Answer

To isolate faulty equipment

Answer

To store electrical energy

Answer

To regulate current flow

Question 24

Which type of substation is primarily designed for interconnecting transmission lines and switching operations?

Accepted Answer

Switching substation

Answer

Bulk power substation

Answer

Distribution substation

Answer

Converter substation

Question 25

What is the primary function of a ground wire on a transmission tower?

Accepted Answer

To provide a low-resistance path to ground, diverting lightning strikes safely

Answer

To carry electricity

Answer

To prevent lightning strikes

Answer

To support the tower structure

Question 26

What is the main purpose of a power system protection relay?

Accepted Answer

To detect and respond to abnormal conditions by isolating faulty equipment and maintaining system stability

Answer

To amplify signals

Answer

To regulate voltage levels

Answer

To store energy

Question 27

Which component in a power system is used to increase or decrease voltage levels?

Accepted Answer

Transformer

Answer

Relay

Answer

Substation

Answer

Circuit breaker

Question 28

What is the primary function of a transmission line in a power grid?

Accepted Answer

To transfer electrical power over long distances.

Answer

To isolate sections of the power system.

Answer

To protect equipment from overcurrents.

Answer

To regulate voltage levels.

Question 29

Which type of substation is used to connect high-voltage transmission lines to lower-voltage distribution lines?

Accepted Answer

Step-down substation

Answer

Step-up substation

Answer

Interconnection substation

Answer

Bulk power substation

Question 30

What is the central function of a circuit breaker in a power system?

Accepted Answer

To interrupt current flow in the event of a fault.

Answer

To protect transformers from overloads.

Answer

To isolate sections of the power system for maintenance.

Answer

To regulate the flow of power.

Question 31

What is the primary role of a lightning arrester in a power system?

Accepted Answer

To divert lightning strikes to the ground.

Answer

To break electrical circuits in case of a fault.

Answer

To step up or step down voltage levels.

Answer

To regulate the power factor.

Question 32

Which component is used to measure and monitor electrical parameters in a power system?

Accepted Answer

Instrument transformer

Answer

Circuit breaker

Answer

Lightning arrester

Answer

Relay

Question 33

What is the intended purpose of utilizing a busbar in a substation?

Accepted Answer

To connect multiple circuits or equipment at the same voltage level.

Answer

To protect equipment from overcurrents.

Answer

To isolate sections of the power system.

Answer

To measure electrical parameters.

Question 34

What is a key benefit of employing underground transmission lines?

Accepted Answer

Enhanced reliability and reduced visual impact.

Answer

Easier maintenance

Answer

Higher efficiency

Answer

Lower cost

Question 35

Which of the following components is primarily used to regulate voltage levels in a power system?

Accepted Answer

Transformer

Answer

Circuit breaker

Answer

Transmission line

Answer

Generator

Question 36

What is the primary function of a transmission line within a power system?

Accepted Answer

Transmit electrical power over extensive distances

Answer

Convert electrical energy to mechanical energy

Answer

Store electrical energy

Answer

Protect the system from electrical faults

Question 37

What is the main purpose of a substation in an electrical power system?

Accepted Answer

Transform voltage levels to facilitate efficient power distribution

Answer

Store electrical energy

Answer

Generate electricity

Answer

Transmit electricity over long distances

Question 38

Which type of transformer is utilized to increase the voltage of an electrical system?

Accepted Answer

Step-up transformer

Answer

Isolation transformer

Answer

Autotransformer

Answer

Step-down transformer

Question 39

Which property of a material influences its ability to conduct electricity?

Accepted Answer

Resistance

Answer

Thickness

Answer

Length

Answer

Color

Question 40

What is the primary reason for using capacitors in a power system?

Accepted Answer

To store electrical energy and enhance power factor

Answer

To generate electricity

Answer

To transmit electricity

Question 41

What is the main function of a synchronous condenser within a power system?

Accepted Answer

Provide voltage support and reactive power compensation

Answer

Transmit electricity

Answer

Generate electricity

Question 42

Which power system component is responsible for changing the voltage level?

Accepted Answer

Transformer

Answer

Busbar

Answer

Capacitor

Answer

Transmission line

Question 43

What is the primary purpose of a substation in a power system?

Accepted Answer

To control and protect the flow of power

Answer

To generate electricity

Answer

To store energy

Answer

To transmit electricity over long distances

Question 44

Which type of transmission line offers the lowest resistance to current flow?

Accepted Answer

Overhead transmission line

Answer

Submarine transmission line

Answer

Underground transmission line

Answer

Coaxial cable

Question 45

What is the main function of a circuit breaker in a power system?

Accepted Answer

To interrupt the flow of current during faults

Answer

To store energy

Answer

To provide isolation between circuits

Answer

To regulate voltage

Question 46

Which power system component is primarily used to regulate the flow of reactive power?

Accepted Answer

Capacitor

Answer

Diode

Answer

Inductor

Answer

Resistor

Question 47

What is the purpose of insulators in power systems?

Accepted Answer

To prevent unintended current flow and maintain electrical safety

Answer

To store energy

Answer

To increase the conductivity of the system

Question 48

Which type of transformer is used to provide electrical isolation between different voltage levels?

Accepted Answer

Isolation transformer

Answer

Distribution transformer

Answer

Autotransformer

Answer

Power transformer

Question 49

What is the function of a busbar in an electrical power system?

Accepted Answer

To provide a common connection point for multiple circuits

Answer

To regulate voltage

Answer

To isolate different voltage levels

Answer

To store energy

Question 50

Which type of transmission line is most vulnerable to power outages caused by environmental factors?

Accepted Answer

Overhead transmission line

Answer

Coaxial cable

Answer

Submarine transmission line

Answer

Underground transmission line

Question 51

What is the main purpose of protective relays in power systems?

Accepted Answer

To detect and isolate faults in the system

Answer

To transform voltage

Answer

To store energy

Answer

To regulate voltage